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0．015ng／mL、Hg为0．006ng／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 is used for particulate heavy metal Hg and As . Experimental result shows that the main speciation （71.48% in total） of Hg is propitious to biological using, but the main speciation of As is residue （95.2% in total）. The detection limit of atomic fluorescence spectrometry is 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
《江西化工》
2009年第2期73-75,共3页
Jiangxi Chemical Industry
关键词
原子荧光
形态分析
重金属
底泥
Atomic fluorescence spectrometry Speciation analysis Heavy metal Sediment
