纳氏试剂分光光度法测定水中氨氮掩蔽剂研究  

The Masking Agent of Nessler's Reagent Spectrophotometric Determination of Ammonia Nitrogen in Water

作　　者：肖翔群 毛予捷 伍丽平 毛玉霞 闫海富 

机构地区：[1]黄河水资源保护科学研究院,郑州450004

出　　处：《河南科学》2014年第8期1415-1418,共4页Henan Science

基　　金：水利部公益性行业科研专项(201101006)

摘　　要：从生产工艺质量稳定性以及掩蔽能力对比研究了14个厂家包括酒石酸钾钠掩蔽剂在内的5种化合物,指出酒石酸钾钠生产工艺存在质量不稳定风险,不宜作为国标纳氏试剂分光光度法测定水中氨氮的掩蔽剂,EDTA四钠导致纳氏试剂不显色也不宜作为掩蔽剂使用,其余3种化合物综合掩蔽性能优于酒石酸钾钠,宜作为国标测定方法的掩蔽剂.A comparative study on the quality stability in produce process and the masking ability of five compounds including the masking agent sodium potassium tartrate from 14 manufacturers. There is the risk of the quality instability in sodium potassium tartrate production process itself ,accordingly sodium potassium tartrate is not appropriate to be used as masking agent in national standard of Nessler’s reagent spectrophotometric determination of ammonia nitrogen in water. Tetrasodium EDTA is not appropriate to be used as masking agent because it cause Nessler’s reagent without colour reaction. The comprehensive masking properties of the remaining three compounds are superior to sodium potassium tartrate and is appropriate to be used as masking agent in national standard determination.

关 键 词：国标 掩蔽剂 水质监测 氨氮 纳氏试剂 

分 类 号：X832[环境科学与工程—环境工程]