用硫氰酸盐分光光度法测定钨

Spectrophotometric determination of tungsten with thiocyanate.

作者信息

Yatirajam V, Dhamija S

机构信息

Department of Chemistry, Kurukshetra University, Kurukshetra 132119, Haryana, India.

出版信息

Talanta. 1975 Sep;22(9):760-2. doi: 10.1016/0039-9140(75)80221-9.

DOI:10.1016/0039-9140(75)80221-9

PMID:18961726

Abstract

The yellow W(V) thiocyanate complex is formed by shaking sodium tungstate solution in 0.2-0.8M potassium thiocyanate and 4-5M hydrochloric acid, with mercury. It is extracted with 2% tribenzylamine solution in chloroform and measured at 410 nm. U, Ti, V, Cr, Fe, Co, Ni, Mn, Al, Pb, Sn, Bi, Pd, Sb and Cu do not interfere. Pt and Mo in amount equal to that of tungsten give errors of up to 0.4 and 2% respectively. The sensitivity is 0.013 mug ml and Beer's law is obeyed up to 24 mug ml .

摘要

通过在0.2 - 0.8M硫氰酸钾和4 - 5M盐酸中，用汞振荡钨酸钠溶液来形成黄色的W(V)硫氰酸盐络合物。用2%三苄胺的氯仿溶液萃取该络合物，并在410nm处进行测定。铀、钛、钒、铬、铁、钴、镍、锰、铝、铅、锡、铋、钯、锑和铜不产生干扰。与钨含量相等的铂和钼分别会产生高达0.4%和2%的误差。灵敏度为0.013μg/ml，在高达24μg/ml的范围内符合比尔定律。