Determination method for total sulfur in water quality

Abstract

The invention discloses a determination method for total sulfur in water quality. The method includes the following four steps: while sulfurous gas which can leak out is fixed by calcium oxide, potassium permanganate oxidation, nitric acid oxidation, hydrochloric acid regulation and barium chromate spectrophotometry are used for determining sulfate radical, which is converted into sulfur content. During total sulfur determination in water sample, calcium oxide and potassium permanganate are first added to oxidate sulfide ions under alkaline condition, sulfur in other valence states is then oxidated or decomposed into the sulfate radical under the joint oxidation of potassium permanganate and nitric acid, hydrochloric acid solution is then added to regulate the water sample and remove the color of the potassium permanganate, finally, the sulfate radical content in water quality is determined by barium chromate spectrophotometry, and total sulfur content is worked out. According to the characteristics of the sulfur in different valence states in water quality, by fixation, oxidation and decomposition, the method finally converts the sulfur in all valence states into the sulfate radical, and utilizes barium chromate spectrophotometry to determine the sulfate radical, and thereby the total sulfur in water quality is determined. Determination is simple, the result is accurate, and the method can be applied in fields such as environment protection and monitoring, food monitoring and sulfur balance analysis.

Description

technical field [0001] The invention relates to a method for measuring total sulfur in water quality in the fields of environmental assessment, environmental protection, analysis and monitoring, food, etc., and in particular to a method for measuring total sulfur in water quality for environmental protection monitoring. Background technique [0002] In the process of daily environmental monitoring, the detection methods of sulfur in water quality include thiosulfate, sulfide, sulfate, etc., but do not involve the detection of some other forms of sulfur, such as parapersulfate, sulfite and other sulfur The determination of the valence state is not easy. When doing material balance, the balance of sulfur is difficult to do; in environmental protection issues, it is difficult to determine the specific amount of sulfur in water quality converted into gaseous state and solid state. Therefore, inventing a method for determining total sulfur in water is of great significance to ma...

AI Technical Summary

Problems solved by technology

[0002] In the process of daily environmental monitoring, the detection methods of sulfur in water quality include thiosulfate, sulfide, sulfate, etc., but do not involve the detection of some other forms of sulfur, such as parapersulfate, sulfite and other sulfur It is