水处理剂分析方法 第3部分：氨氮含量的测定（英文版）
Analysis of water treatment chemicals—Part 3: Determination of ammonia nitrogen
标准状态
基本信息
标准简介
This document describes methods for determining the ammonia nitrogen content of water treatment chemicals. This document is applicable to the determination of ammonia nitrogen in water treatment chemicals. With a sample mass of 5 g, the Nessler reagent spectrophotometric method (2 cm cell) has a detection limit of 2.5 mg/kg and is applicable to ammonia nitrogen contents of 10 mg/kg to 200 mg/kg; the salicylic acid spectrophotometric method (1 cm cell) has a detection limit of 1 mg/kg and is applicable to 4 mg/kg to 16 mg/kg; the distillation-neutralization titration method has a detection limit of 5 mg/kg and is applicable to contents not less than 20 mg/kg; the rapid salicylic acid spectrophotometric method (4 cm cell) has a detection limit of 1.5 mg/kg and is applicable to 10 mg/kg to 250 mg/kg.
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