T/NMRJ 021-2024 Determination of cyanide in soil by flow injection spectrophotometric method using isonicotinic acid-sulfosalicylic acid
T/NMRJ 021-2024 Determination of cyanide in soil by flow injection spectrophotometric method using isonicotinic acid-sulfosalicylic acid
Basic Information
Scope
Scope: This document specifies the flow injection azide-barbituric acid spectrophotometric method for the determination of cyanides in soil. This document is applicable to the determination of cyanides in soil. When the sampling quantity is 20 g and the detection optical path is 10 mm, the detection limit is 0.01 mg/kg, and the determination limit is 0.04 mg/kg; Main technical content: This standard is applicable to the determination of cyanides in soil. The main technical content of this standard includes the preparation of soil extract solution and the determination of cyanide content by flow injection method, and the results of cyanide are obtained respectively. The detection limit of the method is 0.01 mg/kg, and the determination limit is 0.04 mg/kg. The method study is based on the "Water Quality - Determination of Cyanides - Flow Injection-Spectrophotometric Method" (HJ 823).