水样中氨氮测定时试剂空白值偏高的原因分析  

Analysis of Causes of High Blank Value for Determination of Ammonia Nitrogen in Water

作　　者：陈一清 常佳 于磊 

机构地区：[1]湖南省环境监测中心站

出　　处：《光谱实验室》2010年第4期1304-1308,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：用纳氏试剂测定水体中氨氮时常常出现试剂空白偏高的现象,本文对氨氮分析过程进行检查,发现氨氮空白偏高的主要原因是分析的精密度不够高和校准曲线的应用存在误区所致。When ammonia nitrogen in water was determined by the method of Nessler＇s reagent colorimetry,the blank values are often too high.According to the phenomenon,each step of the process was analyzed,discovering the main reasons are the no high analysis accuracy and the application of calibration curve exist mistake area.

关 键 词：氨氮 空白 校准曲线 

分 类 号：O657.32[理学—分析化学]