摘要
采用五步连续萃取和原子荧光光度法分析湖泊底泥中Hg和As的形态。结果表明:Hg主要以生物可利用性较强的三种形态(可交换态、碳结合态和铁锰氧化物结合态)存在,占总量的71.48%,而As则主要以残渣态存在,占总量的95.2%。采用原子荧光光谱法同时测定砷和汞,其检出限As为0.015 ng/mL、Hg为0.006 ng/mL;RSD为:0.33%～4.26%;回收率为:97.7%～100.6%。
An improved analytical procedure involving five steps sequential extraction and atomic fluorescence spectrometry was used for particulate heavy metal Hg and As. Experimental result showd that the main speciation（71.48 % in total）of Hg was propitious to biological using, but the main speciation of As was residue （95.2 % in total）. The detection limit of atomic fluorescence spectrometry was 0.015 ng/mL for As, 0.006 ng/mL for Hg, the RSD rang from 0.33 % to 4.26 %, the recoveries of these elements range from 97.7 % to 100.6 %.
出处
《广东化工》
CAS
2009年第5期160-162,共3页
Guangdong Chemical Industry
关键词
原子荧光
形态分析
重金属
底泥
atomic fluorescence spectrometry
speciationanalysis
heavy metal
sediment
