Detection method of total phosphorus content in water

Abstract

The invention provides a detection method of total phosphorus content in water. The detection method comprises the following steps: (1) determining the absorbance of a phosphate standard solution by adopting a spectrophotometric method and drawing a working curve; (2) providing a water body test sample to be detected and adding a potassium persulfate solution into the water body test sample to be detected; carrying out microwave sealed digestion; oxidizing all total phosphorus in the water body test sample to be detected into orthophosphate, so as to obtain a digestion solution; (3) adding ascorbic acid into the digestion solution and uniformly mixing for 30s to 60s; adding a molybdate solution and carrying out color development reaction to obtain a reaction solution; (4) providing a blank water sample and referring to operation of steps (2) and (3) to obtain a blank reaction solution; (5) carrying out spectrophotometric absorbance determination on the reaction solution and the blank water sample to obtain test sample absorbance and blank absorbance respectively; referring to the working curve and calculating to obtain the total phosphorus content in the water body test sample to be detected.

Description

technical field [0001] The invention belongs to water body detection methods, in particular to a detection method for total phosphorus content in water quality. Background technique [0002] At present, in order to protect water quality and control hazards, sewage treatment has been put on the agenda as an important issue for national development both at home and abroad. Phosphorus is an important indicator to reflect the degree of water pollution and eutrophication, and it is also one of the main indicators for my country to implement the total amount of pollutant discharge control. In recent years, with the improvement and strengthening of national environmental protection laws and regulations, strict monitoring of pollutant indicators including total phosphorus in various types of wastewater and river water is required. Therefore, the research on the fast, accurate and simple method of total phosphorus in sewage and the formulation and monitoring of total phosphorus dete...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a detection method of total phosphorus content in water quality, aiming to solve the problem of cumbersome and complicated operation, large experimental error, poor reproducibility, high risk factor and difficult operation when detecting total phosphorus content in water quality in the prior art. Strict conditions; or high cost and poor accuracy

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