摘要
本文报告利用二硫基丙醇（ＢＡＬ）在ＨＣＩ（ｌｍｏｌ／Ｌ）中能与砷（Ⅲ）形成衍生物原理，经甲苯萃取后，用气相色谱法测定生物样品中的痕量砷。应用此法分别与用巯基棉（ＳＣＦ）分离和不经分离直接测定桃叶标准样品（８２３０１）中的痕量砷。结果表明，两种方法的测定值均与正书值相符，但本法简单易行，最小检出限为０．０ｌｎｇ。用本文方法测定了鄂西茶叶中的痕量砷，回收率在９６％～１２３％之间．
rsenic(Ⅲ)in HCl sloution (lmol/L)could combine with BAL
(2.3-dimercaptopropanol)forming a As-Bal derivative which could be deter-mined
gas-chromatographically without the separation procedure with SCF(sulfhydryl cotton
fiber),Using this method,the amount of arsenic in st-andard reference sample(peach
leaf)determined with or without SCF se-paration was in good agreement with the certificated
value It showed that there was no interference after As-BAL derivative formation 。The result of
trace arsenic in green tea determined by this method with-out SCF separation was
satisfactory,The minimum detectable value was 0.133pmol(0.0lng),and the recovery was
96%-123%.1(Wuhan Research Institute of Material Protection,Wuhan 430030)2(Department of
Chemistry,Huazhong University of Science and Technology Wuhan 430074)
出处
《营养学报》
CAS
CSCD
北大核心
1994年第4期412-415,共4页
Acta Nutrimenta Sinica
基金
自然科学基金
关键词
砷
气相色谱法
茶叶
trace
arsenic gas chromatography green tea
