Method for quantitatively detecting sulfur-containing amino acid in sludge

Abstract

The invention discloses a method for quantitatively detecting sulfur-containing amino acid in sludge. The method comprises the following steps: cold-drying, grinding and sieving the sludge, so as to prepare a sample; oxidizing sulfur-containing amino acid in the sludge into cysteic acid and methionine sulfone; hydrolyzing protein by virtue of concentrated hydrochloric acid, and carrying out ultrafiltration, edulcoration and purification on hydrolysate by virtue of 3kD filter membrane; processing by virtue of o-phthalaldehyde as a derivating agent, so as to enable a sulfur-containing amino acid derivative to have fluorescence characteristics; and finally, carrying out quantitative analysis on the derivative by virtue of a high performance liquid chromatography. Compared with a conventional method, the method has the advantages that the operation is simple and convenient, the toxicity is low, an expensive amino acid analysis meter does not need to be used, the detection accuracy and the sensitivity are high, the repeatability is good, and the like.

Description

Technical field: [0001] The invention belongs to the field of chemical analysis and detection, and is a method for quantitatively detecting sulfur-containing amino acids in sludge with relatively simple operation, low toxicity, low cost, high accuracy and high sensitivity. Background technique: [0002] In recent years, the odor problem caused by sewage treatment plants has attracted more and more attention. Among them, sulfur-containing substances play an important role in causing the generation of bad odor. In sewage treatment plants, volatile organic sulfur (VOSCs), such as methyl mercaptan (MM), dimethyl sulfide (DMS), etc., and inorganic sulfur, such as hydrogen sulfide (H 2 S) etc. have been identified as the most important substances causing bad odor. The odor threshold of this kind of substance is extremely low, and the stench it produces is very serious, even trace amounts of VOCS and H 2 S can also make a great contribution to odor pollution. Studies have shown...

AI Technical Summary

Problems solved by technology

However, due to the strong specificity and high detection cost of amino acid analyzers, the popularity of amino acid analyzers is low.

At present, the detection of sulfur-containing amino acids is mainly concentrated in the fields of food and medicine, and the detection of sulfur-containing amino acids in complex environmental samples, such as sewage and sludge, has not been reported yet.

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