摘要
提出了一种断续流动注射氢化物发生—原子荧光光谱法测定海水中砷的方法。优化了流动注射氢化物反应发生条件为:5.0%盐酸-0.1 mol.L-1柠檬酸为载流和样品介质,2%KBH4-0.5%KOH还原剂,用氩气将产生的砷化氢带入氢氩焰中原子化,原子荧光光谱法检测。有机砷在此实验条件下不形成干扰,As(Ⅴ)须经预还原后测定。分析了青岛栈桥海滨浴场等海域采集的实际海水样品,实验结果表明海水样品中有机砷含量低,在大批量样品测定时,测定海水中As(Ⅲ)和As(Ⅴ)的量可以近似反映近海海域中砷污染情况。
The present paper reports a method based on intermittent flow injection（FI） hydride generation（HG） combined with atomic fluorescence spectrometry（AFS） detection for the determination of As in sea water.Experimental conditions for FI-HG were optimized.5.0% hydrochloric acid-0.1 mol· L-1 citric acid solution was selected as the carrier flow as well as the sample medium,and 2% KBH4-0.5% KOH was used as the reductant.An argon gas flow was used for carrying the generated arsine to the Ar-H2 flame for atomization.Organic species of arsenic cannot be generated arsine under the selected conditions.The real sea water samples collected at Zhanqiao seashore in Qingdao and more than 30 other areas were analyzed under optimized working conditions,and experiments verified that the determination of As（Ⅲ） and As（Ⅴ） could approximately assess the As pollution for marine water while organic arsenic in natural sea water was so slight that could be neglected in case large amount of samples should be analyzed.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2010年第10期2834-2837,共4页
Spectroscopy and Spectral Analysis
基金
上海科学仪器创新行动计划子课题项目(08142200202)
国海环字(318)项目
上海交通大学交叉基金项目(YG2007MS16)资助
