钼-硫氰酸盐-甲基紫高灵敏离子缔合体系的研究和应用

STUDY ON HIGH SENSITIVE ION-ASSOCIATION COMPLEX SYSTEM OF MOLYBDENUM ( VI ) -THIO-CYANATE-METHYL VIOLET

本文研究了在聚乙烯醇存在下,钼(Ⅵ)—SCN—甲基紫高灵敏离子缔合体系,在0·10—0·14M硫酸介质中,该体系λ_(max)=530nm,表观摩尔吸光系数_(530)=9·20×10~5l·mol^(-1)·cm^(-1),0～μgM_0/25ml符合比尔定律,选择性较好,并用于钢铁中钼的测定。对显色反应机理作了初步探讨。

A high sensitive ion-association complex of the molybdenum (VI) with thiocyate and methl violet in the presence of polyvingl alochol ( PVA ) wvere investigated. In an aqaeous solution, containing0.10-0.14M H2SO4 its apparent molar absorptivity is 9.2×105 1· mol-1· cm-1, at 530 nm, Beer law is Obeyed in the Jange of 0-5μg Mo/25ml. This system has a favourable selectivty and so Can be applied to direct determination of trace Mo in steel with satisfactory results.