{"title":"Spectrophotometer Needed","description":"\u003cp\u003eColorimetric analysis kits for environmental labs, universities, and regulated monitoring programs. Compatible with standard spectrophotometers and colorimeters. Built for accuracy and reporting requirements.\u003c\/p\u003e","products":[{"product_id":"water-phosphate-test-kit","title":"Water Phosphate Test Kit","description":"\u003ch2\u003eEasy to Use, Quick Results, Non-Toxic\u003c\/h2\u003e\n\u003cp\u003eGet reliable phosphate testing results in the field — in just 20-25 minutes. This professional water phosphate test kit is designed for environmental monitoring, agriculture, and water quality assessment without the wait or cost of laboratory analysis.\u003c\/p\u003e\n\u003cp\u003ePerfect for on-site testing when you need immediate answers about your water quality. No laboratory experience required — just follow the simple instructions and get accurate, instrument-based measurements.\u003c\/p\u003e\n\u003ch2\u003eKit Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Range (0.5 - 5.0 ppm Phosphate)\u003c\/strong\u003e — For ambient, unimpaired environmental water sources\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Range (5.0 - 20.0 ppm Phosphate)\u003c\/strong\u003e — For drinking water, well water, agricultural runoff, and other water types\u003c\/li\u003e\n\u003cli\u003eResults in 20-25 minutes\u003c\/li\u003e\n\u003cli\u003eOn-site testing - no laboratory required\u003c\/li\u003e\n\u003cli\u003eEasy to use - no laboratory experience required\u003c\/li\u003e\n\u003cli\u003eEnvironmentally benign\u003c\/li\u003e\n\u003cli\u003eBased on green chemistry enzymatic method\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlease Note - this kit requires a photometer to read the results\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eChoose Your Range\u003c\/h2\u003e\n\u003cp\u003ePhosphate is reported in different units depending on your field of use and where you live.\u003c\/p\u003e\n\u003ctable border=\"1\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePTK Field Water Test Kits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eppm PO₄\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eppm PO₄-P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eµM PO₄\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLow Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e0.5 - 5.0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e0.16 - 1.6\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e5.26 - 52.65\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e5.0 - 20.0\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1.63 - 6.53\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e52.65 - 210.59\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollect Samples:\u003c\/strong\u003e Collect your water samples directly into the sample collection tubes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix \u0026amp; React:\u003c\/strong\u003e Add buffer and some of each sample to the prepared reaction cuvettes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDevelop Color:\u003c\/strong\u003e Enzyme reacts with phosphate to produce a UV-measurable color change.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRead Results:\u003c\/strong\u003e Measure the color with a photometer and compare to calibration standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Options\u003c\/h2\u003e\n\u003cp\u003eChoose from kits for phosphate analysis of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5 samples\u003c\/li\u003e\n\u003cli\u003e10 samples\u003c\/li\u003e\n\u003cli\u003e25 samples\u003c\/li\u003e\n\u003cli\u003e50 samples\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaterials You Will Need\u003c\/h2\u003e\n\u003cp\u003eYou will need a marker for labeling tubes and cuvette caps, and a \u003cstrong\u003ephotometer capable of reading at 360 nm which accepts standard square cuvettes.\u003c\/strong\u003e For digital precision and data tracking, the \u003ca href=\"\/products\/gaiaxus-handheld-photometer\"\u003eGaiaXus photometer\u003c\/a\u003e pairs seamlessly with our kits and connects to the \u003ca href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.gaiaxus\"\u003eGaiaXus Android app\u003c\/a\u003e or \u003ca href=\"https:\/\/apps.apple.com\/us\/app\/gaiaxus\/id6748620502\"\u003eGaiaXus iPhone app\u003c\/a\u003e for easy result logging and provides exact numerical readings at 360 nm.\u003c\/p\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSample Collection Tubes\u003c\/li\u003e\n\u003cli\u003eSnap Cap Tubes (contain buffer)\u003c\/li\u003e\n\u003cli\u003eReaction Cuvettes (contains enzyme + co-factor)\u003c\/li\u003e\n\u003cli\u003ePipettes\u003c\/li\u003e\n\u003cli\u003eCardboard Cuvette Holder\u003c\/li\u003e\n\u003cli\u003eSet of Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWell water, drinking water, agricultural water, pond water\u003c\/li\u003e\n\u003cli\u003eStreams, lakes, rivers, oceans, wetlands, and environmental watersheds\u003c\/li\u003e\n\u003cli\u003eWastewater and industrial effluent\u003c\/li\u003e\n\u003cli\u003eAquarium, hydroponic, aquaculture, and aquaponic water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Requirements\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis product must be stored refrigerated at 4°C upon receipt.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\" title=\"Contact Us\" rel=\"noopener\" target=\"_blank\"\u003eContact us\u003c\/a\u003e to inquire about bulk quantity discounts or wholesale orders, or to request a quote for international orders.\u003ca href=\"mailto:sales@nitrate.com\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eResources \u0026amp; Downloads\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-WSR_instructions.pdf\" target=\"_blank\" title=\"Standard Range Water Phosphate Test Kit Instructions\" rel=\"noopener\"\u003eStandard Range Water Phosphate Test Kit Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-WLR_instructions.pdf\" target=\"_blank\" title=\"Low Range Water Phosphate Test Kit Instructions\" rel=\"noopener\"\u003eLow Range Water Phosphate Test Kit Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK_Data_Sheet.pdf\" target=\"_blank\" title=\"Data Sheet for Water Phosphate Test Kits\" rel=\"noopener\"\u003eData Sheet for Water Phosphate Test Kits\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/Phosphate_Test_Kits_SDS.pdf\" target=\"_blank\" title=\"SDS (Safety Data Sheet) for Phosphate Test Kits\" rel=\"noopener\"\u003eSDS (Safety Data Sheet) for Phosphate Test Kits\u003c\/a\u003e\u003c\/p\u003e","brand":"NECi","offers":[{"title":"5 Pack \/ Low Range: 0.5 ppm – 5.0 ppm Phosphate","offer_id":53132915278188,"sku":"PTK-WLR-05","price":45.0,"currency_code":"USD","in_stock":true},{"title":"5 Pack \/ Standard Range: 5.0 ppm – 20.0 ppm Phosphate","offer_id":53205198307692,"sku":"PTK-WSR-05","price":45.0,"currency_code":"USD","in_stock":true},{"title":"10 Pack \/ Low Range: 0.5 ppm – 5.0 ppm Phosphate","offer_id":53132915310956,"sku":"PTK-WLR-10","price":80.0,"currency_code":"USD","in_stock":true},{"title":"10 Pack \/ Standard Range: 5.0 ppm – 20.0 ppm Phosphate","offer_id":53205198340460,"sku":"PTK-WSR-10","price":80.0,"currency_code":"USD","in_stock":true},{"title":"25 Pack \/ Low Range: 0.5 ppm – 5.0 ppm Phosphate","offer_id":53132915343724,"sku":"PTK-WLR-25","price":165.0,"currency_code":"USD","in_stock":true},{"title":"25 Pack \/ Standard Range: 5.0 ppm – 20.0 ppm Phosphate","offer_id":53205198373228,"sku":"PTK-WSR-25","price":165.0,"currency_code":"USD","in_stock":true},{"title":"50 Pack \/ Low Range: 0.5 ppm – 5.0 ppm Phosphate","offer_id":53132915376492,"sku":"PTK-WLR-50","price":305.0,"currency_code":"USD","in_stock":true},{"title":"50 Pack \/ Standard Range: 5.0 ppm – 20.0 ppm Phosphate","offer_id":53205198405996,"sku":"PTK-WSR-50","price":305.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-WSR-05.jpg?v=1773774168"},{"product_id":"soil-phosphate-test-kit","title":"Soil Phosphate Test Kit","description":"\u003ch2\u003eOptimize Fertilizer Application for Maximum Yield\u003c\/h2\u003e\n\u003cp\u003eNECi's Soil Phosphate Test Kit delivers quick, reliable on-site phosphate testing — no lab training required. Accurate soil phosphate data helps you apply the right amount of fertilizer for maximum crop yield, reduce input costs, meet nutrient management planning (NMP) requirements, and prevent phosphate runoff.\u003c\/p\u003e\n\u003ch2\u003eKit Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDetection Range: 0 - 20 ppm Phosphate\u003c\/li\u003e\n\u003cli\u003eResults in less than one hour\u003c\/li\u003e\n\u003cli\u003eOn-site testing - no laboratory required\u003c\/li\u003e\n\u003cli\u003eEasy to use - no lab training needed\u003c\/li\u003e\n\u003cli\u003eEnvironmentally benign\u003c\/li\u003e\n\u003cli\u003eBased on green chemistry enzymatic method\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePlease Note - this kit requires a photometer to read the results\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollect Samples:\u003c\/strong\u003e Collect soil samples and add to extraction tubes with buffer to extract phosphate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix \u0026amp; React:\u003c\/strong\u003e Add a drop of extraction mix to the enzymatic reaction cuvettes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDevelop Color:\u003c\/strong\u003e Enzyme reacts with phosphate to produce a UV-measurable color change.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRead Results:\u003c\/strong\u003e Measure the color with a photometer and compare to calibration standard.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKit Options\u003c\/h2\u003e\n\u003cp\u003eChoose from kits for phosphate analysis of:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5 samples\u003c\/li\u003e\n\u003cli\u003e10 samples\u003c\/li\u003e\n\u003cli\u003e25 samples\u003c\/li\u003e\n\u003cli\u003e50 samples\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaterials You Will Need\u003c\/h2\u003e\n\u003cp\u003eYou will need a pair of scissors, pen, marker, and a \u003cstrong\u003ephotometer capable of reading at 360 nm which accepts standard square cuvettes.\u003c\/strong\u003e For digital precision and data tracking, the \u003ca rel=\"noopener\" title=\"GaiaXus handheld photometer\" href=\"\/products\/gaiaxus-handheld-photometer\" target=\"_blank\"\u003eGaiaXus photometer\u003c\/a\u003e pairs seamlessly with our kits and connects to the \u003ca rel=\"noopener\" title=\"GaiaXus Android app\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.gaiaxus\" target=\"_blank\"\u003eGaiaXus Android app\u003c\/a\u003e or \u003ca rel=\"noopener\" title=\"GaiaXus iPhone app\" href=\"https:\/\/apps.apple.com\/us\/app\/gaiaxus\/id6748620502\" target=\"_blank\"\u003eGaiaXus iPhone app\u003c\/a\u003e for easy result logging and provides exact numerical readings at 360 nm.\u003c\/p\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSample Collection Tubes\u003c\/li\u003e\n\u003cli\u003eSnap Cap Tubes (contain buffer)\n\u003cul\u003e\n\u003cli\u003eWhite dot tube is for calibration blank\u003c\/li\u003e\n\u003cli\u003eGreen dot tube is for calibration standard (2.5 ppm PO\u003csub\u003e4\u003c\/sub\u003e)\u003c\/li\u003e\n\u003cli\u003eRemaining tubes are for samples\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eLarge Measuring Spoon\u003c\/li\u003e\n\u003cli\u003eReaction Cuvettes (contains enzyme + co-factor)\u003c\/li\u003e\n\u003cli\u003ePipettes\u003c\/li\u003e\n\u003cli\u003eCardboard Cuvette Holder\u003c\/li\u003e\n\u003cli\u003eSet of Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSoil phosphate testing\u003c\/li\u003e\n\u003cli\u003eNutrient management planning (NMP) compliance\u003c\/li\u003e\n\u003cli\u003eOptimizing fertilizer application\u003c\/li\u003e\n\u003cli\u003ePreventing phosphate runoff\u003c\/li\u003e\n\u003cli\u003eEnvironmental stewardship\u003c\/li\u003e\n\u003cli\u003eAgricultural research and education\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Requirements\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis product must be stored refrigerated at 4°C upon receipt.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\" title=\"Contact Us\" rel=\"noopener\" target=\"_blank\"\u003eContact us\u003c\/a\u003e to inquire about bulk quantity discounts or wholesale orders, or to request a quote for international orders.\u003c\/p\u003e\n\u003ch2\u003eResources \u0026amp; Downloads\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-SSR_instructions.pdf\" title=\"Soil Phosphate Standard Range Test Kit Instructions\" rel=\"noopener\" target=\"_blank\"\u003eSoil Phosphate Standard Range Test Kit Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SDS for On-Site Phosphate Test Kits\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/Phosphate_Test_Kits_SDS.pdf\" target=\"_blank\"\u003eSDS for On-Site Phosphate Test Kits\u003c\/a\u003e\u003c\/p\u003e","brand":"NECi","offers":[{"title":"5 Pack","offer_id":53132917539180,"sku":"PTK-SSR-05","price":45.0,"currency_code":"USD","in_stock":true},{"title":"10 Pack","offer_id":53132917571948,"sku":"PTK-SSR-10","price":80.0,"currency_code":"USD","in_stock":true},{"title":"25 Pack","offer_id":53132917604716,"sku":"PTK-SSR-25","price":165.0,"currency_code":"USD","in_stock":true},{"title":"50 Pack","offer_id":53132917637484,"sku":"PTK-SSR-50","price":305.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-SSR-05.jpg?v=1773946188"},{"product_id":"benchtop-phosphate-reagents","title":"Benchtop Phosphate Test Kit","description":"\u003ch2\u003eProfessional Phosphate Analysis Made Simple\u003c\/h2\u003e\n\u003cp\u003eGet accurate, quantitative phosphate measurements from any aqueous sample with this complete benchtop reagent kit. Perfect for laboratories analyzing wastewater, soil extracts, plant tissue, and environmental samples.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Testing:\u003c\/strong\u003e Analyze wastewater, soil extracts, plant samples, and more\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple Sample Prep:\u003c\/strong\u003e Extract solid samples with HPLC water before analysis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Results:\u003c\/strong\u003e Quantifies phosphate in complex mixtures using proven photometric method\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Tube Format:\u003c\/strong\u003e Easy-to-use benchtop protocol compatible with standard lab equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Options:\u003c\/strong\u003e Choose your concentration range and sample quantity to match your needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAvailable Ranges\u003c\/h2\u003e\n\u003cp\u003ePhosphate is reported in different units depending on your field of use and where you live.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003ePTK Test Tube Kits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eppm Phosphate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eppm Phosphate-P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eµM Phosphate\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eStandard Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e5.0 - 20.0\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e1.63 - 6.53\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e52.65 - 210.59\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eLow Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e0.5 - 5.0\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e0.16 - 1.6\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e5.26 - 52.65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eKit Options\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e25 Sample or 100 Sample Analysis\u003c\/li\u003e\n\u003cli\u003eChoose either Standard Range or Low Range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNeed a custom configuration? \u003ca title=\"Contact Us\" href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e to create a kit tailored to your specific application.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/nitrate.com\/store\/media\/wysiwyg\/Pictures\/PNP-ASSAY-SCHEMATIC.png\" alt=\"Phosphate Assay Schematic - PNP Method\"\u003e\u003c\/p\u003e\n\u003cp\u003eOur proven colorimetric method produces a purine product that increases absorbance at 360 nm in direct proportion to inorganic phosphate concentration. Simply measure your samples against the included phosphate standards and calculate concentrations using linear regression—it's that straightforward.\u003c\/p\u003e\n\u003ch2\u003eMaterials You Will Need\u003c\/h2\u003e\n\u003cp\u003eYou will need a graduated cylinder, variable pipetters, a test tube vortex-type mixer, spectrophotometer capable of measuring 360 nm with UV compatible cuvettes, clean and phosphate-free 13 x 100mm test tubes, a timer, HPLC water, and ice.\u003c\/p\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMESG in dry powder form\u003c\/li\u003e\n\u003cli\u003ePurine Nucleoside Phosphorylase (PNP) freeze-dried protein glass\u003c\/li\u003e\n\u003cli\u003eHEPES\/MgCl\u003csub\u003e2\u003c\/sub\u003e buffer\u003c\/li\u003e\n\u003cli\u003ePhosphate Standard (100 ppm Phosphate) in liquid form\u003c\/li\u003e\n\u003cli\u003eStandard tubes – 5 tubes (1.5 mL) for preparing Phosphate Standards\u003c\/li\u003e\n\u003cli\u003eDilution tube – (5 mL) for preparing stock standard\u003c\/li\u003e\n\u003cli\u003eSet of Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWastewater treatment monitoring\u003c\/li\u003e\n\u003cli\u003eSoil nutrient analysis\u003c\/li\u003e\n\u003cli\u003ePlant tissue testing\u003c\/li\u003e\n\u003cli\u003eEnvironmental water quality assessment\u003c\/li\u003e\n\u003cli\u003eResearch and quality control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Requirements\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis product must be stored refrigerated at 4°C upon receipt.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Contact Us\" href=\"\/pages\/contact\" target=\"_blank\"\u003eContact us\u003c\/a\u003e to inquire about bulk quantity discounts or wholesale orders, or to request a quote for international orders.\u003ca href=\"mailto:sales@nitrate.com\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eResources \u0026amp; Downloads\u003c\/h2\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-TTSR-25_instructions.pdf\" target=\"_blank\"\u003eStandard Range Test Tube Format Phosphate Test Kit Instructions: 25 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-TTLR-25_instructions.pdf\" target=\"_blank\"\u003eLow Range Test Tube Format Phosphate Test Kit Instructions: 25 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-TTSR-100_instructions.pdf\" target=\"_blank\"\u003eStandard Range Test Tube Format Phosphate Test Kit Instructions: 100 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-TTLR-100_instructions.pdf\" target=\"_blank\"\u003eLow Range Test Tube Format Phosphate Test Kit Instructions: 100 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PNP_Storage_and_Reconstitution.pdf\" target=\"_blank\"\u003ePNP Storage and Reconstitution\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/Phosphate_Test_Kits_SDS.pdf\" rel=\"noopener\" target=\"_blank\"\u003eSDS for Phosphate Test Kits\u003c\/a\u003e\u003c\/p\u003e","brand":"NECi","offers":[{"title":"25 Sample Analysis \/ Standard Range: 5 ppm - 20 ppm Phosphate","offer_id":53132936806764,"sku":"PTK-TTSR-25","price":50.0,"currency_code":"USD","in_stock":true},{"title":"25 Sample Analysis \/ Low Range: 0.5 - 5 ppm Phosphate","offer_id":53132936839532,"sku":"PTK-TTLR-25","price":50.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Standard Range: 5 ppm - 20 ppm Phosphate","offer_id":53132936872300,"sku":"PTK-TTSR-100","price":125.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Low Range: 0.5 - 5 ppm Phosphate","offer_id":53132936905068,"sku":"PTK-TTLR-100","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/PTK-TTSR-25.jpg?v=1773774414"},{"product_id":"benchtop-nitrate-reagent-kit","title":"Benchtop Nitrate Test Kit","description":"\u003ch2\u003eQuantitative Nitrate Analysis for Laboratory Use\u003c\/h2\u003e\n\u003cp\u003eNECi's Benchtop Nitrate Test Kit delivers precise, enzyme-based nitrate quantification for any aqueous sample — from wastewater to soil and plant extracts. The test tube format uses recombinant Nitrate Reductase (NaR) to reduce nitrate (NO₃⁻) to nitrite (NO₂⁻) via NADH, which is then quantified colorimetrically at 540 nm ± 20 nm using your colorimeter or spectrophotometer. No toxic cadmium reduction required.\u003c\/p\u003e\n\u003ch2\u003eAvailable Ranges\u003c\/h2\u003e\n\u003cp\u003eNitrate is reported in different units depending on your field of use and where you live.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eNTK Test Tube Kits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eppm Nitrate-N\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eppm Nitrate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e\u003cstrong\u003eµM Nitrate\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eStandard Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e0.5 - 10.0\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e2.0 - 44\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e36 - 714\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eLow Range Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e0.05 - 1.0\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e0.2 - 4.4\u003c\/td\u003e\n\u003ctd style=\"width: 20%; border: 1px solid #000; padding: 8px; text-align: center;\"\u003e3.6 - 71.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eKit Options\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e25 Sample or 100 Sample Analysis\u003c\/li\u003e\n\u003cli\u003eChoose either Freshwater or Saltwater Analysis\u003c\/li\u003e\n\u003cli\u003eChoose either Standard Range or Low Range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEnzyme Variants\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard Range Freshwater Kit:\u003c\/strong\u003e Contains YNaR (Yeast Nitrate Reductase)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll other variations\u003c\/strong\u003e (Standard Range Saltwater, Low Range Freshwater, Low Range Saltwater): Contain AtNaR (Arabidopsis thaliana Nitrate Reductase)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth enzymes provide the same high-quality, reliable results with the key features listed below.\u003c\/p\u003e\n\u003ch2\u003eMaterials You Will Need\u003c\/h2\u003e\n\u003cp\u003eYou will need a graduated cylinder, variable pipetters, a test tube vortex-type mixer, colorimeter or spectrophotometer with glass or plastic cuvettes, clean and nitrate-free 13 x 100mm test tubes, a timer, nitrate-free deionized water, concentrated HCl, and ice.\u003c\/p\u003e\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAssay Buffer\u003c\/li\u003e\n\u003cli\u003eColor Reagent No. 1 Powder (Sulfanilamide)\u003c\/li\u003e\n\u003cli\u003eColor Reagent No. 2 Powder (N-(1-Naphthyl)\u003cwbr\u003eethylenediamine)\u003c\/wbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFreeze Dried NADH\u003c\/li\u003e\n\u003cli\u003eFreeze Dried Nitrate Reductase\u003c\/li\u003e\n\u003cli\u003eEnzyme Diluent\u003c\/li\u003e\n\u003cli\u003e100 ppm Nitrate-N Standard\u003c\/li\u003e\n\u003cli\u003eMicrocentrifuge Tubes\u003c\/li\u003e\n\u003cli\u003eSet of Instructions\u003c\/li\u003e\n\u003cli\u003eNitrate-free Salt Water (only included in saltwater kits)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAnimal origin free\u003c\/li\u003e\n\u003cli\u003eRecombinant enzyme produced according to strict QA\/QC procedures, ensuring lot-to-lot consistency, reliability, and stability\u003c\/li\u003e\n\u003cli\u003ePurified by Immobilized Metal Affinity Chromatography (IMAC) guaranteeing greater than 95% purity\u003c\/li\u003e\n\u003cli\u003eSmall sample volume and enzyme reagents offer sustainability and no-hassle shipping, storage, and disposal for your laboratory\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWastewater and environmental water quality monitoring\u003c\/li\u003e\n\u003cli\u003eSoil and plant extract nitrate analysis\u003c\/li\u003e\n\u003cli\u003eAgricultural and food testing\u003c\/li\u003e\n\u003cli\u003eResearch and quality control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStorage Conditions \u0026amp; Shelf Life Information*\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e*Shelf life guaranteed if stored as directed below\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003e\u003cbr\u003e\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003e-80°C\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003e-20°C\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003e4°C\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003eRT: 20°C – 25°C\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #000; padding: 8px;\"\u003eAbove 40°C\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eFreeze-Dried\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e3+ Years\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e2+ Years\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e1+ Year\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e6 months\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003eUp to 1 week\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e\u003cstrong\u003eIn Solution*\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e1+ Year\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003e6+ months\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003eUp to 1 week\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003eNot recommended\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #000; padding: 8px;\"\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e* Enzyme provided with enzyme diluent working solution, contains 25% glycerol\u003c\/p\u003e\n\u003ch2\u003eOrdering Information\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/contact\" title=\"Contact Us\" rel=\"noopener\" target=\"_blank\"\u003eContact us\u003c\/a\u003e to inquire about bulk quantity discounts or wholesale orders, or to request a quote for international orders.\u003c\/p\u003e\n\u003ch2\u003eResources \u0026amp; Downloads\u003c\/h2\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Standard Range Test Tube Format Nitrate Test Kit Instructions: 25 Samples\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/NTK-TTSR-25_instructions.pdf\" target=\"_blank\"\u003eStandard Range Test Tube Format Nitrate Test Kit Instructions: 25 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Low Range Test Tube Format Nitrate Test Kit Instructions: 25 Samples\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/NTK-TTLR-25_instructions.pdf\" target=\"_blank\"\u003eLow Range Test Tube Format Nitrate Test Kit Instructions: 25 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Standard Range Test Tube Format Nitrate Test Kit Instructions: 100 Samples\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/NTK-TTSR-100_instructions.pdf\" target=\"_blank\"\u003eStandard Range Test Tube Format Nitrate Test Kit Instructions: 100 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Low Range Test Tube Format Nitrate Test Kit Instructions: 100 Samples\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/NTK-TTLR-100_instructions.pdf\" target=\"_blank\"\u003eLow Range Test Tube Format Nitrate Test Kit Instructions: 100 Samples\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"SDS for Test Tube Format and Microplate Format Nitrate Test Kits\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/SDS_Test_Tube_and_Microplate_kits.pdf\" target=\"_blank\"\u003eSDS for Test Tube Format and Microplate Format Nitrate Test Kits\u003c\/a\u003e\u003c\/p\u003e","brand":"NECi","offers":[{"title":"25 Sample Analysis \/ Standard Range:  0.5 ppm - 10.0 ppm Nitrate-N \/ Freshwater","offer_id":53132974883180,"sku":"NTK-TTSR-25","price":50.0,"currency_code":"USD","in_stock":true},{"title":"25 Sample Analysis \/ Standard Range:  0.5 ppm - 10.0 ppm Nitrate-N \/ Saltwater","offer_id":53132979536236,"sku":"NTK-TTSR-25S","price":50.0,"currency_code":"USD","in_stock":true},{"title":"25 Sample Analysis \/ Low Range:  0.05 ppm - 1.0 ppm Nitrate-N \/ Freshwater","offer_id":53132974915948,"sku":"NTK-TTLR-25","price":50.0,"currency_code":"USD","in_stock":true},{"title":"25 Sample Analysis \/ Low Range:  0.05 ppm - 1.0 ppm Nitrate-N \/ Saltwater","offer_id":53132979569004,"sku":"NTK-TTLR-25S","price":50.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Standard Range:  0.5 ppm - 10.0 ppm Nitrate-N \/ Freshwater","offer_id":53132975014252,"sku":"NTK-TTSR-100","price":125.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Standard Range:  0.5 ppm - 10.0 ppm Nitrate-N \/ Saltwater","offer_id":53132979667308,"sku":"NTK-TTSR-100S","price":125.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Low Range:  0.05 ppm - 1.0 ppm Nitrate-N \/ Freshwater","offer_id":53132975047020,"sku":"NTK-TTLR-100","price":125.0,"currency_code":"USD","in_stock":true},{"title":"100 Sample Analysis \/ Low Range:  0.05 ppm - 1.0 ppm Nitrate-N \/ Saltwater","offer_id":53132979700076,"sku":"NTK-TTLR-100S","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/files\/NTK-TTLR-25.jpg?v=1774021203"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/5830\/7948\/collections\/IMG_9830.jpg?v=1777906975","url":"https:\/\/nitrate.com\/collections\/spectrophotometer-needed.oembed","provider":"NECi","version":"1.0","type":"link"}