矿物岩石中微量锗的催化导数极谱测定

Catalytic Differential Polarographic Determination of Trace Germanium in Rocks and Minerals

锗是一种典型的分散元素,常伴生在铅锌矿及煤矿中,含量一般在0.001—0.000X%范围内。对于矿物岩石及烟道灰中的微量锗,一般在6mol/L盐酸中蒸馏出锗或用四氯化碳从9—10mol/L的盐酸萃取分离出锗后,分光光度法测定,不仅操作麻烦,且引起严重污染。多年来,为找寻一种不需分离富集而直接测定锗的快速灵敏的分析方法,是分析生产人员的愿望和要求。极谱法测定锗,虽有一些报导.

Ln the presence of vanadium(Ⅳ),there exists a seusitive derivative polaro-graphic catalytic wave of the complex formed by germanium-vanadium(Ⅳ)-alizarin red S in 0.5mol/L HC1O_(4)medium at-0.4 V.The wave height is directly proportioual to the concentration of germanium in the range of 2×10^(-3)-0.2μg/ml.More than 30 common ions do not interfere.The detection limit of germanium is 0.001ppm.