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      <image:caption>Xylem Inc.</image:caption>
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      <image:caption>Xylem Inc.</image:caption>
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    <loc>https://refractometershop.com/products/l-lactate-linearity-standard-30-mmol-l-125-ml</loc>
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      <image:title>YSI 1530 L-Lactate Linearity Standard</image:title>
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      <image:title>YSI 1531 Glucose Linearity Standard</image:title>
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      <image:title>Carbonate Buffer - Methanol</image:title>
      <image:caption>Xylem Inc.</image:caption>
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      <image:title>YSI 2327 L-Lactate Calibrator Standard</image:title>
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      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/buffer</loc>
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      <image:title>YSI 2357 Gluc/Lact/Dextr./Sucr./Gluta.Chol. Buffer</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
    <loc>https://refractometershop.com/products/potassium-ferrocyanide-125-ml</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2363PotassiumFerrocyanide.jpg?v=1699547340</image:loc>
      <image:title>YSI 2363 Potassium Ferrocyanide</image:title>
      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/glucose-dextrose-membranes-pack-of-4</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-glucose-membrane.jpg?v=1698937669</image:loc>
      <image:title>YSI 2365 Glucose Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/glucose-calibrator-standard-10-mmol-l-125-ml-1500</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2367GlucoseStandard.jpg?v=1699608266</image:loc>
      <image:title>YSI 2367 Glucose Calibrator Standard</image:title>
      <image:caption></image:caption>
    </image:image>
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  <url>
    <loc>https://refractometershop.com/products/glucose-linearity-standard-25-0-mmo-l-125ml</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2368GlucoseLinearityStandard.jpg?v=1699608696</image:loc>
      <image:title>YSI 2368 Glucose Linearity Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/nacl-solution-30-ml</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2392NaClSolution.jpg?v=1699608840</image:loc>
      <image:title>YSI 2392 NaCl Solution</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/blank-membranes-for-hydrogen-peroxide-pack-of-4</loc>
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    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-blank-membrane.jpg?v=1698937787</image:loc>
      <image:title>YSI 2701 Blank Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/lactose-membranes-pack-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Lactose Membranes (pack 4)</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/sucrose-membranes-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-sucrose-membrane.jpg?v=1698938127</image:loc>
      <image:title>YSI 2703 Sucrose Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-linearity-standard-100-mg-dl</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2714GlucoseLinearityStandard.jpg?v=1699609300</image:loc>
      <image:title>YSI 2714 Glucose Linearity Standard 100 mg/dL</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-linearity-standard-400-mg-dl</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2715GlucoseLinearityStandard.jpg?v=1699609443</image:loc>
      <image:title>YSI 2715 Glucose Linearity Standard 400 mg/dL</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-linearity-standard-700-mg-dl</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2716GlucoseStandard.jpg?v=1699610694</image:loc>
      <image:title>YSI 2716 Glucose Standard 700 mg/dL</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/methanol-membranes-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-Methanol-membrane.jpg?v=1698938320</image:loc>
      <image:title>YSI 2725 Methanol Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/methanol-standards-kit-1-0-g-l-2-5-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>YSI Methanol Standards Kit, 1.0 g/l 2.5 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamine-membrane-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-glutamine-membrane.jpg?v=1698938440</image:loc>
      <image:title>YSI 2735 Glutamine Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamine-calibrator-standard-5-00-mmol-l-125-ml</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2736GlutamineStandard.jpg?v=1699610865</image:loc>
      <image:title>YSI 2736 Glutamine Calibrator Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamine-linearity-standard-8-00-mmol-l-156-ml</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2737GlutamineLinearityStandard.jpg?v=1699610963</image:loc>
      <image:title>YSI 2737 Glutamine Linearity Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/dual-cal-standard-glucose-1-80-g-l-lactate-0-45-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2747Glucose_LactateCalibratorStandard.jpg?v=1699614045</image:loc>
      <image:title>YSI 2747 Glucose/Lactate Calibrator Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/dual-linearity-standard-glucose-18-0-g-l-lactate-1-78-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2748Dextrose_LactateStandard.jpg?v=1699611717</image:loc>
      <image:title>YSI 2748 Dextrose/Lactate Linearity Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/printer-paper-pack-of-5-rolls</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Printer Paper (pack of 5 rolls)</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamate-membranes-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-glutomate-membrane.jpg?v=1698938582</image:loc>
      <image:title>YSI 2754 Glutamate Membranes (pack of 4)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamate-calibrator-standard-5-0-mmol-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2755GlutamateCalibratorStandard.jpg?v=1699613243</image:loc>
      <image:title>YSI 2755 Glutamate Calibrator Standard, 5 mmol/L</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glutamate-linearity-standard-10-0-mmol-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI2756GlutamateLinearityStandard.jpg?v=1699613714</image:loc>
      <image:title>YSI 2756 Glutamate Linearity Standard</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/choline-membranes-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_71063856-c219-40d3-bc5a-3d5529a6255e.jpg?v=1523977176</image:loc>
      <image:title>Choline Membranes (pack of 4)</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/choline-calibrator-standard-175-mg-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_2ca5d4e0-aed0-466e-b9a6-57b1505bda17.jpg?v=1523977176</image:loc>
      <image:title>Choline Calibrator Standard, 175 mg/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/choline-linearity-standard-450-mg-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_be8c52f7-17a6-460d-97e2-33d47e6e4bf4.jpg?v=1523977177</image:loc>
      <image:title>Choline Linearity Standard, 450 mg/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/dual-cal-standard-glucose-2-5-g-l-lactate-0-5-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_5dc76ab0-482d-410c-aa0b-9e43b08421b9.jpg?v=1523977178</image:loc>
      <image:title>Dual Cal Standard - Glucose 2.5 g/l, Lactate 0.5 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/dual-standard-glucose-25-0g-l-lactate-2-50-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_62859aeb-47c4-4368-b4f6-993202f07869.jpg?v=1523977178</image:loc>
      <image:title>Dual Standard - Glucose 25.0g/l, Lactate 2.50 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/sucrose-standard-25-0-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Sucrose Standard, 25.0 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/sucrose-standard-5-0-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Sucrose Standard, 5.0 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/lactose-standard-5-00-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_1ec468a5-46dd-4c9d-8995-adc3e0185dc1.jpg?v=1523977180</image:loc>
      <image:title>Lactose Standard, 5.00 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/lactose-standard-25-0-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Lactose Standard, 25.0 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/ethanol-membranes-pack-of-4</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/files/YSI-Ethanol-membrane.jpg?v=1698938706</image:loc>
      <image:title>YSI 2786 Ethanol Membrane Kit (pack of 4)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/ethanol-standards-kit-2-0-g-l-and-3-2-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_c589ccd8-cbc7-4cac-90b7-6096a6418eb1.jpg?v=1523977183</image:loc>
      <image:title>YSI Ethanol Standards Kit - 2.0 g/l and 3.2 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/ethanol-standards-low-concentration-0-5g-l-and-1-0-g-l</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>YSI Ethanol Standards - Low Concentration - 0.5g/l and 1.0 g/l</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-standard-50-mg-dl</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_cbbfd389-c655-48fe-8037-59509b3e22bd.jpg?v=1523977184</image:loc>
      <image:title>Glucose Standard, 50 mg/dl</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_a9bc27c8-e90a-4960-8abe-b8536aa78c04.jpg?v=1523977188</image:loc>
      <image:title>YSI Glucose Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glycerol-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_64694fcf-dd01-4b78-9ae2-011fe85d3f03.jpg?v=1523977189</image:loc>
      <image:title>YSI Glycerol Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/lactate-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Xylem-Square_46a970b0-9ef6-4038-85f9-db68fb71dd3f.jpg?v=1523977190</image:loc>
      <image:title>Lactate Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/lactose-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
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    <image:image>
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      <image:title>Lactose Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
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    <image:image>
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      <image:title>Ammonium/Potassium Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-sucrose-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Glucose/Sucrose Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
    <loc>https://refractometershop.com/products/glutamine-glutamate-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Glutamine/Glutamate Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-lactate-ammonium-potassium-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Glucose/Lactate/Ammonium/Potassium Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/glucose-lactate-glutamate-glutamine-starter-kit</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>YSI Glucose/Lactate/Glutamate/Glutamine Starter Kit</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/printer-option-for-2900-2950</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Printer Option for 2900/2950</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/r24-24-place-capped-vial-tray-tubes-of-10-8-mm-diameter</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
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      <image:title>R24: 24 Place Capped Vial Tray   (tubes of 10.8 mm diameter)</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/p96-round-bottom-96-well-plates</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>P96: Round Bottom 96 Well Plates</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/x-pierce-films</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>X-Pierce Films</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>R24: 12mm Glass Vial Tray</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
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      <image:title>R8 : 12mm Test Tube Rack</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>R4: 16mm Test Tube Rack</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Potassium Calibration Standard, 1000 mg/L (250 ml) - 2950</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>YSI Ammonium Calibrator Standard, 500 mg/L (250 ml) - 2950</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>YSI Ammonium Electrode</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  </url>
  <url>
    <loc>https://refractometershop.com/products/potassium-ise-kit-2950</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Potassium ISE Kit - 2950</image:title>
      <image:caption>Xylem Inc.</image:caption>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Glycerol Membranes (pack of 4) - use with 2705 buffer</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Glycerol Calibration Standard, 25 g/l (250 ml)</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/sodium-chloride-check-solution-10-g-l-125-ml</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Sodium Chloride Check Solution, 10 g/l (125 ml)</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>YSI Ammonium/Potassium Check Solution:</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/special-delivery</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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  <url>
    <loc>https://refractometershop.com/products/ag-40-aqueous-solutions-for-refractometer-calibration</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/1-jar-of-brix-calibration-fluid_ILAC_8d3a9cbd-ac86-4981-9ba6-18a72d040f75.jpg?v=1657202949</image:loc>
      <image:title>AG 40 Aqueous solutions for refractometer calibration</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/polarimeter-tube-glass-bubble-length-200mm</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/BellStan-35-30-Polarimeter-Tube-Bubble.jpg?v=1625825489</image:loc>
      <image:title>Polarimeter tube, glass, bubble</image:title>
      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/si-analytics-a-162-electrode</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>SI Analytics A 162 Electrode</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/replacement-illuminator-flap-for-low-volume-eclispe-refractometers</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Replacement Illuminator Flap for Low Volume Eclipse refractometers</image:title>
      <image:caption>Eclipse spare illuminator falp - Low Volume type</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-re-certification</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
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      <image:title>Handheld Refractometer Calibration Certification Service</image:title>
      <image:caption>Xylem Inc.</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/upgrade-to-international-courier-south-central-and-north-america</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/Special_delivery.jpg?v=1570545626</image:loc>
      <image:title>Upgrade to International Courier - South, Central and North America</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/sentix-ph-electrode-82-and-81</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/PH-SenTix-82-BNC.jpg?v=1586265483</image:loc>
      <image:title>SenTix® pH Electrode 82 and 81</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/PH-SenTix-42-BNC.jpg?v=1586266415</image:loc>
      <image:title>SenTix® pH Electrode 42 and 41</image:title>
      <image:caption></image:caption>
    </image:image>
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  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-brix-brix-atc</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/2090/5535/products/OPTi_fruit_veg_530x_2x_381020cb-8725-49d0-99d5-c3ce1f76ded9.jpg?v=1604573773</image:loc>
      <image:title>OPTi Digital Handheld Refractometer - 0-95 Brix (ATC)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-kmw-babo-zeiss</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/KMW Babo/Zeiss)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-baume-zeiss</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/Baumé/Zeiss)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-alcohol-probable-zeiss</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/Alcohol Probable/Zeiss)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-oechsle-swiss-zeiss</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/Oechsle (Swiss)/Zeiss)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-oechsle-german-zeiss</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/Oechsle (German)/Zeiss)</image:title>
      <image:caption></image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-wine-mass-baume-alcohol-probable</loc>
    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>OPTi Digital Handheld Refractometer - Wine (%Mass/Baumé/Alcohol Probable)</image:title>
      <image:caption></image:caption>
    </image:image>
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  <url>
    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-butyro-butyro</loc>
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    <loc>https://refractometershop.com/products/opti-digital-handheld-refractometer-battery-sulphuric-acid</loc>
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  <url>
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    <lastmod>2026-04-17T22:45:49+01:00</lastmod>
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      <image:caption>Centre fill polarimeter tube, Bellingham + Stanley</image:caption>
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      <image:caption>Cup shaped polarimeter tube, Bellingham + Stanley</image:caption>
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  <url>
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  <url>
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      <image:caption></image:caption>
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      <image:caption>WTW FDO 925, by from RefractometerShop </image:caption>
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      <image:caption>TetraCon conductivity cell, buy form RefractometerShop</image:caption>
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      <image:caption></image:caption>
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    <loc>https://refractometershop.com/products/sentix-980-ph-electrode-with-1-5m-cable</loc>
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      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/ph-lab-k-armour-for-sentix-980</loc>
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      <image:title>pH Lab K Armour for Sentix 980</image:title>
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    <loc>https://refractometershop.com/products/tetracon-325-c-conductivity-probe</loc>
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    <loc>https://refractometershop.com/products/e-set-trace</loc>
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      <image:title>E-SET Trace</image:title>
      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/round-glass-cells-for-turbidity-meters-430-and-750</loc>
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      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/technical-buffer-solutions-for-ph-electrodes</loc>
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      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/sentix-orp-measurement-for-general-applications</loc>
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      <image:caption></image:caption>
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  <url>
    <loc>https://refractometershop.com/products/portable-ph-mv-meter-profiline-ph-3310</loc>
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      <image:caption>portable ph meter</image:caption>
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    <loc>https://refractometershop.com/products/portable-ph-mv-meter-profiline-ph-3110</loc>
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      <image:caption>Portable pH/mV Meter pH 3110</image:caption>
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  <url>
    <loc>https://refractometershop.com/products/oxitop-pm-calibration-tablets-for-b-o-d-auto-check-measurement-systems</loc>
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      <image:title>OxiTop® PM – Calibration Tablets for B.O.D. Auto-Check Measurement Systems</image:title>
      <image:caption>OxiTop calibration</image:caption>
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  <url>
    <loc>https://refractometershop.com/products/silica-test-kit-for-abbe-refractometers-67-1-brix</loc>
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      <image:title>Silica Test Kit for Abbe Refractometers (67.1% Brix)</image:title>
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  <url>
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      <image:title>XPC-200 adaptor ADP450 - used with 200mm tube 35-92</image:title>
      <image:caption></image:caption>
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      <image:title>OPTi Digital Handheld Refractometer - Salinity (NaCl)</image:title>
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