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Hash total phosphorus / total nitrogen online analyzer Return on a page
typical application
Total phosphorus total nitrogen automatic analyzer can be applied to automatic monitoring of total phosphorus, total nitrogen and COD of surface water and municipal sewage
Measuring principle
Total phosphorus: (in accordance with international GB11893-89): potassium persulfate as oxidant, digested at 120 ° C for 30 min, transferred phosphide into phosphate ion, molybdenum blue spectrophotometry (measuring wavelength: 700 nm)
Total nitrogen: potassium persulfate as oxidant (in accordance with international GB11893-89): potassium persulfate as oxidant, digested at 120 ° C for 30 min, the nitride is transferred to nitrate ion, the pH of the sample solution is adjusted to 2-3; UV Light absorption spectrophotometry (measurement wavelength: 220 nm, 275 nm turbidity correction: A = A220-A275 × 2) COD (UV): dual-wavelength spectrophotometry (UV 254 nm, visible light 546 nm)
Total phosphorus total nitrogen automatic analyzer can be applied to automatic monitoring of total phosphorus, total nitrogen and COD of surface water and municipal sewage
Measuring principle
Total phosphorus: (in accordance with international GB11893-89): potassium persulfate as oxidant, digested at 120 ° C for 30 min, transferred phosphide into phosphate ion, molybdenum blue spectrophotometry (measuring wavelength: 700 nm)
Total nitrogen: potassium persulfate as oxidant (in accordance with international GB11893-89): potassium persulfate as oxidant, digested at 120 ° C for 30 min, the nitride is transferred to nitrate ion, the pH of the sample solution is adjusted to 2-3; UV Light absorption spectrophotometry (measurement wavelength: 220 nm, 275 nm turbidity correction: A = A220-A275 × 2) COD (UV): dual-wavelength spectrophotometry (UV 254 nm, visible light 546 nm)
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