GB/T 7493-1987
ActiveWater quality--Determination of nitrogen(nitrite)--Spectrophotometric method
水质 亚硝酸盐氮的测定 分光光度法
Application Summary AI generated
This standard specifies a spectrophotometric method for determining nitrite nitrogen in water, based on the reaction with a diazotization-coupling reagent to form a colored azo dye. It is applied in environmental monitoring and water quality testing laboratories to assess pollution levels in surface water, groundwater, and wastewater. The method is used for compliance testing with water quality standards and for evaluating the efficiency of wastewater treatment processes.
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