Wuxi Dianchuang Technology Co., Ltd. Total Phosphorus and Nitrogen Online Analyzerbe based onMeasurement of total phosphorus and potassium persulfate by ammonium molybdate spectrophotometrySpectrophotometricMeasure total nitrogen using the method,Combining UV digestion at normal pressure and low temperature ensures thorough digestion of water samples and improves the reliability of the instrument.Total nitrogen adopts 220nm and 275nm dualWavelength detection technology,Fully compliant with HJ636-2012 standard,Effectively eliminate the influence of organic matter on measurementHigher accuracy.instrumenthaveLow detection limit, wide range of measurementThorough digestion, good repeatability, simple operationLow maintenance volumeWaiting for advantages.

DCT-TNP-122 Total Phosphorus and Nitrogen AnalyzerWidely applicable for monitoring surface water, municipal sewage, and agricultural sewage; Monitoring of industrial wastewater from petroleum, chemical, papermaking, printing and dyeing industries; Monitoring of water treatment processes such as waterworks and sewage treatment plants.

1、 Working principle of total phosphorus and total nitrogen automatic detector
Total phosphorus was measured using ammonium molybdate spectrophotometry,Add potassium persulfate and sulfuric acid to the water sample, and then95Conducted at ℃ temperatureUVDissolve to oxidize phosphorus containing compounds in the water sample into phosphate ions. After the water sample cools, add ascorbic acid and ammonium molybdate for molybdenum hydrogen reduction and color development to generateBlue phosphomolybdic acid, measurement880nmplaceThe absorbance ofAnd calculate based on thisConcentration of total phosphorus in water sample.

Total nitrogen measurement using potassium persulfate digestion UVSpectrophotometricThe law,Add to the water samplepotassium persulfateAnd with sodium hydroxide, and in70Conducted at ℃ temperatureUVDissolve to oxidize nitrogen-containing compounds in the water sample into nitrates. After the water sample cools, add hydrochloric acid to remove interference such as carbon dioxide and carbonate ions from the water sample, and measure at the same time220nmand275nmCalculate the absorbance at the position and use it to calculateTotal in water samplenitrogenThe concentration.