摘要
此法在有关资料介绍用萃取比色测定矿石中铊的基础上,取其优点,通过实践,稍有改进。为消除金、汞、锑、砷、强氧化剂、还原剂、高含量硅等对微量铊测定的干扰,样品宜在塑料坩埚中用硝酸,氢氟酸、硫酸溶解。金用二氯化锡还原成单体金,过滤除去。
(TlBr4)-forms a coJoured complex with malachite green in hydrochloride acid and extract with benzene,organic phase was determined directly at 640nm.The interfered elements were eliminated by digesting with HCl+HNO_(3)+H_(2)SO_(4).The recovery percent was 99.5-102.5%.This method permits to determined more than 0.1 ppm of thorium.
出处
《岩矿测试》
CAS
1986年第2期155-156,I0016,共3页
Rock and Mineral Analysis
