催化极谱法连续测定岩石中钨和钼

本文提出了在二苯基乙醇酸-二苯胍-氯酸钠催化极谱体系测钨后,加入少许钛铁试剂,使钼产生一个极灵敏的导数波。谊波形尖锐、对称,便于测量钼。建立的连测体系简便灵敏,用于岩石样品中钨和钼的测定,取得了满意的效果。

Consecutive Catalytic Polarographic Determination of Tungsten and Molybdenum in Rocks

A catalytic polarographic procedure has been developed for the consecutive determination of W and Mo. Tungsten is first determined in a supporting electrolyte of benzilic acid- diphenyl guanidine- sodium chlorate with a high sensitivity. Then a small amount of tiferron is added to the supporting electrolyte. This addition results in a very sensitive derivative wave of Molybdenum at-0.3 (vs. SCE). The wave is sharp, symmetrical and easy to measure. The detection limit is 0. 02 ppm for W and 0. 01 ppm for Mo. The procedure has been used in rock analysis with satisfactory results.