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化学学报
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化学学报 ›› 1952, Vol. 18 ›› Issue (1): 21-28. 上一篇    下一篇

论文

钼及钨之测定VII：4, 4’二胺聯苯及其数种衍生物作为编的沉淀剂

梁樹權, 张赣南   

  1. 中国科学院物理化学研究所
  • 投稿日期:1951-09-07 发布日期:2013-06-04

The Determination of Molybdenum and Tungsten VII. Benzidine and Some of Its Derivatives as Precipitants for Tungstate Ions

Shu-Chuan Liang, Kan-Nan Chang   

  1. Institute of Physical Chemistry, Academia Sinica, Shanghai
  • Received:1951-09-07 Published:2013-06-04

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1.用二胺聯苯及其數種衍生物沉澱鎢酸根時,其適宜的pH範圍如下:[4,4']二胺聯苯pH:2.0-5.5[3,3']二甲基[4,4']二胺聯苯2.9-4.7[3,3']二甲氧基[4,4']二胺聯苯2.0-4.1[4]對胺聯苯氮甲烯[2]甲苯酚1.7-3.9[3,4,3',4']四胺聯苯1.7-4.82.用[4,4']二胺聯苯作沉澱劑時,二胺聯苯和鎢酸根在沉澱前的濃度之乘積與後者沉澱完全與否的關係,曾加研究.3.用[3,3']二甲基[4,4']二胺聯苯作沉澱劑時,能测定低至10毫克的三氧化鎢.

Von Knorte first suggested the use of benzidine and o-tolidine for the determination of tungsten, With the latter reagent, he succeeded also in separating tungstate from phosphate(5). Later on, o-dianisidine (1,2) and vanillylidene benzidine(4) have been proposed as precipitants for tungstate.