萃取分光光度法测定钼与硫氰酸盐和氨基吡啶形成的混合配体配合物。

Extractive-spectrophotometric determination of molybdenum as mixed-ligand complexes with thiocyanate and amidopyridines.

作者信息

Patel K S, Mishra R K

机构信息

Department of Chemistry, Ravishankar University, Raipur-492010, M.P., India.

出版信息

Talanta. 1982 Sep;29(9):791-3. doi: 10.1016/0039-9140(82)80060-x.

DOI:10.1016/0039-9140(82)80060-x

PMID:18963237

Abstract

A fairly selective and sensitive method is described for the determination of microgram amounts of molybdenum(V) by means of its reaction with thiocyanate and the enolic form of various amidopyridines and extraction into benzene. The molar absorptivity of the complexes is in the range 1.5-1.9 x 10(4) l.mole(-1).cm(-1) at lambda(max) 470 nm. The method is applicable in 1.5-7M hydrochloric acid or 1.2-6(M) sulphuric acid media. Cu(+), Co(2+), Mn(2+), Zn(2+), Ni(2+), Cd(2+), Fe(3+), Al(3+), Cr(3+), Ti(4+), Zr(4+), V(V), Nb(5+), Ta(5+), W(VI) and U(VI) do not interfere.

摘要

本文描述了一种相当选择性和灵敏的方法，用于通过钼（V）与硫氰酸盐以及各种酰胺吡啶的烯醇形式反应并萃取到苯中来测定微克量的钼（V）。配合物的摩尔吸光系数在470nm最大波长处为1.5 - 1.9×10⁴ l·mol⁻¹·cm⁻¹。该方法适用于1.5 - 7M盐酸或1.2 - 6M硫酸介质。Cu⁺、Co²⁺、Mn²⁺、Zn²⁺、Ni²⁺、Cd²⁺、Fe³⁺、Al³⁺、Cr³⁺、Ti⁴⁺、Zr⁴⁺、V（V）、Nb⁵⁺、Ta⁵⁺、W（VI）和U（VI）不干扰测定。