水环境中两种氨氮检测方法的比较与分析

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中图分类号：X832 文献标志码：A 文章编号：1004—6755（2025）08-0055—03

Abstract：Ammonia nitrogen is one of the critical parameters in fishery water quality monitoring. This study employs the Chinese national standard method （Nessler's reagent spectrophotometry） and the HACH rapid detection method （salicylate spectrophotometry） to compare the accuracy of both detection approaches . By testing 5 standard ammonia nitrogen solutions with known concentrations，analyze the advantages，limitations，and applicable scopes of these two methodologies. The results showed that the overall stability of Nessler's reagent spectrophotometry was higher than that of salicyltae spectrophotometry. Salicylate spectrophotometry can be used as a reference method for general testing or emergency outdoor testing. The Nesser's reagent spectrophotometric method is stillpreferred for laboratory testing.

Key words：ammonia nitrogen;detection method;accuracy

氨氮是无机营养盐的一种1，在水中以游离氨（ NH3 ）和铵离子（ NH4+ ）形式存在，一般以NH4-N 表示[2-3]，两种形式的组成比决定于水的pH 值和温度，一般情况， pH 值及水温愈高，游离氨的比例愈高，对水生生物的毒性愈强。（剩余2221字）