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  <url>
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  <url>
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      <image:title>Methylene Blue Reagent, for Surfactant Analysis - 4900-32</image:title>
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      <image:caption>Methylene Blue Solution I, 0.05 mL (1 drop) = 1 mg/L Sulfide - 4905-4</image:caption>
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      <image:caption>Nitric Acid, 1.00 Normal - 5430-32</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-100-normal-5430-5pt</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_5c747a3f-9aee-406b-b56c-c7d877fef1ee.png?v=1737679117</image:loc>
      <image:title>Nitric Acid, 1.00 Normal - 5430-5PT</image:title>
      <image:caption>Nitric Acid, 1.00 Normal - 5430-5PT</image:caption>
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  <url>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_20f_e66f56fc-39f9-4a92-a790-b0d64b440190.png?v=1737679118</image:loc>
      <image:title>Nitric Acid, 1.00 Normal - 5430-5</image:title>
      <image:caption>Nitric Acid, 1.00 Normal - 5430-5</image:caption>
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  <url>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_4a_420bba76-8387-4050-b431-ae0cba5450c6.png?v=1737679119</image:loc>
      <image:title>Nitric Acid, 1.00 Normal - 5430-1</image:title>
      <image:caption>Nitric Acid, 1.00 Normal - 5430-1</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-100-normal-5430-16</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_500a_5c6deee7-3480-44d7-a1ff-22e5a6c48cb4.png?v=1737679119</image:loc>
      <image:title>Nitric Acid, 1.00 Normal - 5430-16</image:title>
      <image:caption>Nitric Acid, 1.00 Normal - 5430-16</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-200-normal-5432-32</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_1a_b08e2123-d400-4f19-ab59-b3d687f172a6.png?v=1737679120</image:loc>
      <image:title>Nitric Acid, 2.00 Normal - 5432-32</image:title>
      <image:caption>Nitric Acid, 2.00 Normal - 5432-32</image:caption>
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  <url>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_dabaf86a-1ca9-410f-9b65-51cc85d61bc1.png?v=1737679121</image:loc>
      <image:title>Nitric Acid, 2.00 Normal - 5432-5PT</image:title>
      <image:caption>Nitric Acid, 2.00 Normal - 5432-5PT</image:caption>
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  <url>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_20f_b65fe0e3-f70b-4c75-ae6e-77d60e906fb9.png?v=1737679121</image:loc>
      <image:title>Nitric Acid, 2.00 Normal - 5432-5</image:title>
      <image:caption>Nitric Acid, 2.00 Normal - 5432-5</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-200-normal-5432-1</loc>
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    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_4a_84fb832d-fb0d-49e6-b430-6a72af956bd9.png?v=1737679122</image:loc>
      <image:title>Nitric Acid, 2.00 Normal - 5432-1</image:title>
      <image:caption>Nitric Acid, 2.00 Normal - 5432-1</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-200-normal-5432-16</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_500a_971221a6-e2a8-4207-9fef-c3310acf4e5d.png?v=1737679123</image:loc>
      <image:title>Nitric Acid, 2.00 Normal - 5432-16</image:title>
      <image:caption>Nitric Acid, 2.00 Normal - 5432-16</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-250-normal-5434-5</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_20f_281eac11-6dbd-488a-a536-8f4e7b0df429.png?v=1737679124</image:loc>
      <image:title>Nitric Acid, 2.50 Normal - 5434-5</image:title>
      <image:caption>Nitric Acid, 2.50 Normal - 5434-5</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-310-normal-r5436100-25d</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_01a23188-e55c-47b8-bd13-93739e25a79d.png?v=1737679124</image:loc>
      <image:title>Nitric Acid, 3.10 Normal - R5436100-2.5D</image:title>
      <image:caption>Nitric Acid, 3.10 Normal - R5436100-2.5D</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-4725-molar-r5438000-25d</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_8e9fba84-78c8-4476-aa65-1b0a289fe600.png?v=1737679125</image:loc>
      <image:title>Nitric Acid, 4.725 Molar - R5438000-2.5D</image:title>
      <image:caption>Nitric Acid, 4.725 Molar - R5438000-2.5D</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-500-normal-5439-16</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_8365949f-52a2-427d-b32f-a0ddb554e9fa.png?v=1737679126</image:loc>
      <image:title>Nitric Acid, 5.00 Normal - 5439-16</image:title>
      <image:caption>Nitric Acid, 5.00 Normal - 5439-16</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-600-normal-5440-32</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_849b1e64-6c53-40e1-ae49-45e4e8afa459.png?v=1737679127</image:loc>
      <image:title>Nitric Acid, 6.00 Normal - 5440-32</image:title>
      <image:caption>Nitric Acid, 6.00 Normal - 5440-32</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-600-normal-5440-5pt</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_5380e736-576a-4b50-a360-c8c885c8d60e.png?v=1737679127</image:loc>
      <image:title>Nitric Acid, 6.00 Normal - 5440-5PT</image:title>
      <image:caption>Nitric Acid, 6.00 Normal - 5440-5PT</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-600-normal-5440-16</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_948ccb8a-7b02-4197-9d62-7ce097118aca.png?v=1737679128</image:loc>
      <image:title>Nitric Acid, 6.00 Normal - 5440-16</image:title>
      <image:caption>Nitric Acid, 6.00 Normal - 5440-16</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-100-molar-r5440063-20f</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_20f_4b4241bc-4095-4af0-85d4-1ac41c1b006d.png?v=1737679129</image:loc>
      <image:title>Nitric Acid, 1.00 Molar - R5440063-20F</image:title>
      <image:caption>Nitric Acid, 1.00 Molar - R5440063-20F</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-800-normal-800-molar-r5440800-500c</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_500c_4c005646-b106-4586-b3ca-e701b2b276ae.png?v=1737679130</image:loc>
      <image:title>Nitric Acid 8.00 Normal (8.00 Molar) - R5440800-500C</image:title>
      <image:caption>Nitric Acid 8.00 Normal (8.00 Molar) - R5440800-500C</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitric-acid-hydrofluoric-acid-blend-11-r5443700-1a</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-corrosive_1a_8c4f26d2-7fbb-48c4-a56a-1075db9a2c1d.png?v=1704968166</image:loc>
      <image:title>Nitric Acid - Hydrofluoric Acid Blend, 1:1 - R5443700-1A</image:title>
      <image:caption>Nitric Acid - Hydrofluoric Acid Blend, 1:1 - R5443700-1A</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrification-inhibitor-r5443990-125d2</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_cbb9739d-272a-46b8-9f1e-24e2a595cd1f.png?v=1737679130</image:loc>
      <image:title>Nitrification Inhibitor - R5443990-125D2</image:title>
      <image:caption>Nitrification Inhibitor - R5443990-125D2</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrification-inhibitor-r5443990-500c2</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_931735a4-d3ce-4356-8137-8245c066e4f4.png?v=1737679131</image:loc>
      <image:title>Nitrification Inhibitor - R5443990-500C2</image:title>
      <image:caption>Nitrification Inhibitor - R5443990-500C2</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrification-inhibitor-r5443990-50b1</loc>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_62bfea5a-93d6-43c1-80d3-68f8e5c25b9b.png?v=1737679132</image:loc>
      <image:title>Nitrification Inhibitor - R5443990-50B1</image:title>
      <image:caption>Nitrification Inhibitor - R5443990-50B1</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-100-ppm-no-5444-8</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_e4597038-636d-46eb-9de2-61163ddad488.png?v=1737679133</image:loc>
      <image:title>Nitrite Standard, 100 ppm NO?? - 5444-8</image:title>
      <image:caption>Nitrite Standard, 100 ppm NO?? - 5444-8</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-100-ppm-no-5444-16</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_500c_0fcc5b15-740c-4b5f-96fb-44fe815b6d74.png?v=1737679133</image:loc>
      <image:title>Nitrite Standard, 100 ppm NO?? - 5444-16</image:title>
      <image:caption>Nitrite Standard, 100 ppm NO?? - 5444-16</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-200-ppm-no-609-ppm-n-54442-4</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_120c_70edeb9a-014a-433f-8b00-c3d8f10fcf27.png?v=1737679134</image:loc>
      <image:title>Nitrite Standard, 200 ppm NO?? (60.9 ppm N) - 5444.2-4</image:title>
      <image:caption>Nitrite Standard, 200 ppm NO?? (60.9 ppm N) - 5444.2-4</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-500-ppm-no-15225-ppm-n-54445-4</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_120c_5b165351-2c98-443d-a532-716034813622.png?v=1737679135</image:loc>
      <image:title>Nitrite Standard, 500 ppm NO?? (152.25 ppm N) - 5444.5-4</image:title>
      <image:caption>Nitrite Standard, 500 ppm NO?? (152.25 ppm N) - 5444.5-4</image:caption>
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  <url>
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    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:title>Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO??) - R5444900-120C</image:title>
      <image:caption>Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO??) - R5444900-120C</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-nitrogen-standard-1000-ppm-n-3285-ppm-no-r5444900-500c</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_500c_60446487-b716-4400-96a3-f66f9fcb1d26.png?v=1737679136</image:loc>
      <image:title>Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO??) - R5444900-500C</image:title>
      <image:caption>Nitrite Nitrogen Standard, 1000 ppm N (3285 ppm NO??) - R5444900-500C</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-1000-ppm-no-3045-ppm-n-5445-4</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_120a_e3247dfb-b82e-4405-8ab4-fb75bfec0233.png?v=1737679137</image:loc>
      <image:title>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-4</image:title>
      <image:caption>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-4</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-1000-ppm-no-3045-ppm-n-5445-8</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-standards_d3de8bbf-a805-4e64-91e5-88238bf7da15.png?v=1737679138</image:loc>
      <image:title>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-8</image:title>
      <image:caption>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-8</image:caption>
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  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/nitrite-standard-1000-ppm-no-3045-ppm-n-5445-16</loc>
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    <changefreq>daily</changefreq>
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      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_500a_c39ebc95-f827-4813-8db0-b9f5cdc4018c.png?v=1737679138</image:loc>
      <image:title>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-16</image:title>
      <image:caption>Nitrite Standard, 1000 ppm NO?? (304.5 ppm N) - 5445-16</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/ammonia-nitrogen-standard-10-ppm-n-122-ppm-nh-5450-4</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
    <image:image>
      <image:loc>https://cdn.shopify.com/s/files/1/0401/5452/9953/products/ricca-general_120a_797553ed-8cbb-4cd0-83e1-31de220c56e9.png?v=1737679139</image:loc>
      <image:title>Ammonia Nitrogen Standard, 10 ppm N (12.2 ppm NH?) - 5450-4</image:title>
      <image:caption>Ammonia Nitrogen Standard, 10 ppm N (12.2 ppm NH?) - 5450-4</image:caption>
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  <url>
    <loc>https://labproinc.myshopify.com/products/ammonia-nitrogen-standard-10-ppm-n-122-ppm-nh-5450-1</loc>
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      <image:caption>Phenolphthalein Indicator, 1% (w/v) in 70% (v/v) Alcohol, Neutralized - 5618-16</image:caption>
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      <image:caption>Phenolphthalein Indicator, 1% (w/v) in 95% (v/v) Alcohol, Neutralized - 5620-32</image:caption>
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      <image:title>Phenolphthalein Indicator, 1% (w/v) in 95% (v/v) Alcohol, Neutralized - 5620-16</image:title>
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    </image:image>
  </url>
  <url>
    <loc>https://labproinc.myshopify.com/products/phenolphthalein-3-in-95-etoh-r5620300-1a</loc>
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    <changefreq>daily</changefreq>
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    <changefreq>daily</changefreq>
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    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
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    <changefreq>daily</changefreq>
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  <url>
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    <changefreq>daily</changefreq>
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    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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    <changefreq>daily</changefreq>
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  <url>
    <loc>https://labproinc.myshopify.com/products/phenylhydrazine-sulfuric-acid-ts-5772-16</loc>
    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
    <changefreq>daily</changefreq>
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  <url>
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  <url>
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    <lastmod>2026-07-27T13:47:03-07:00</lastmod>
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