摘要
采用小型一级气液分离器的两级气液分离的方法,流动注射-氢化物发生-冷原子荧光光谱法测定了土壤中痕量汞。考察了反应管长度、石英炉原子化器高度、载液酸度、载气流量等实验参数及共存元素对汞测定的影响。研究发现反应管长度对汞荧光信号的峰型及测定的重复性影响较大。在优化的工作条件下测定,方法的检出限为0.7 ng/L,相对标准偏差(n=11)为2.7%。方法应用于土壤样品中痕量汞的分析,结果与认定值相符。
Trace mercury in soil was determined by flow injection-hydride generation-cold atomic fluorescence spectrometry. Experimental parameters such as the length of reaction coil, height of quartz furnace atomizer, acidity of the solution, flow rate of the carrier gas and coexisting elements were optimized. It has been found that the length of reaction coil has great influence on the repeatability and shape of the fluorescence signal peak of mercury. Under the optimum conditions, the detection limit was 0.7 ng/L for Hg based on processing of a 1.6 mL sample volume.The relative standard deviation （n=11） for 0.2μg/L Hg was 2.7 %. The method has been applied to the analysis of trace mercury in soil and the determination results accord with the certified values.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2006年第3期15-17,共3页
Metallurgical Analysis
关键词
汞
原子荧光光谱法
流动注射
氢化物发生
mercury
atomic fluorescence spectrometry
flow injection
hydride generation
