引用本文:刘景龙,吴巧丽,罗守娟.原子荧光法测定水中汞的原子化条件研究[J].环境监控与预警,2018,10(4):39-41
LIU Jing long,WU Qiao li,LUO Shou juan.Research of the Atomization Condition for Determination of Mercury in Water[J].Environmental Monitoring and Forewarning,2018,10(4):39-41
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原子荧光法测定水中汞的原子化条件研究
刘景龙,吴巧丽,罗守娟
铜陵市环境监测中心站,安徽 铜陵 244000
摘要:
分别采用热原子化原子荧光法(热汞法)和冷原子化原子荧光法(冷汞法)测定水中汞,比较了两种方法的检出限、线性相关系数、准确度和精密度的差异。冷汞法和热汞法的检出限分别为0.003和0.01μg/L,标准曲线相关系数分别为0.999 9和0.999 7,加标回收率范围分别为102%~106%和106%~113%。结果表明,冷汞法比热汞法具有更低的检出限,灵敏度和准确度也略优于热汞法。对于冷汞法,提高负高压有利于提高方法的灵敏度、准确度,并具有更低的方法检出限。
关键词:    原子荧光法  
DOI:
分类号:X832;O657.31
文献标识码:B
基金项目:
Research of the Atomization Condition for Determination of Mercury in Water
LIU Jinglong,WU Qiaoli,LUO Shoujuan
Tongling Environmental Monitoring Central Station, Tongling, Anhui 244000, China
Abstract:
The hot mercury method and the cold mercury method were established through setting the working conditions of atomic fluorescence spectrometer. The detection limit, the linear correlation coefficients, the accuracy and the precision of two methods were compared. The detection limit of cold mercury method was 0.003 μg/L, and hot mercury method was 0.01 μg/L. The linear correlation coefficients of the two methods were 0.999 9 and 0.999 7, respectively. And the sample recovery rates of cold mercury method were 102%~106 %, and hot mercury method were 106%~113%. The study results revealed the cold mercury method had a lower detection limit, a better and the sensitivity and the accuracy were better than the hot mercury method. As for the cold mercury method, it can increase the sensitivity and the accuracy by increasing the negative pressure, and it has the lower detection limit.
Key words:  Mercury  Atomic fluorescence spectrometry  Water