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化学学报
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化学学报 ›› 1956, Vol. 22 ›› Issue (5): 367-370. 上一篇    下一篇

论文

苯胺二硫代甲酸铵与苯肼二硫代甲酸铵用作铜试剂

田冰式, 王夔   

  1. 北京医学院化学教研组
  • 投稿日期:1956-06-14 发布日期:2013-06-04

AMMONIUM PHENYLDITHIOCARBAMATE AND AMMONIUM PHENYLHYDRAZINE-DITHIOCARBAMATE AS REAGENTS FOR CUPRIC IONS

TIEN PING-SHIH, WANG KUEI   

  1. Department of Chemistry, Peking Medical College
  • Received:1956-06-14 Published:2013-06-04

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1.苯胺二硫代甲酸铵与苯肼二硫代甲酸铵可用作铜离子的定性试剂,灵敏度皆为0.3γ(1:166,000),只有 Bi+++、Co++、Ni++、Hg2++、Ag+干扰。并可利用生成物在有机溶剂溶解度的不同将铜与钴、镍分离。2.此二试剂与铜离子的生成物的颜色强度符合 Beer 定律,生成物的悬浮体稳定,可用作铜的比色试剂。

Ammonitun phenyldithiocarbamate and ammonium phenylhydrazine-dithiocarbamate have been found to be suitable reagents for cupric ions.Their 0.05% aqueous solutions give with cupric ions dark brown precipitate or coloration.Limit of identification of both reagents is 0.3 γ (concentration limit,1:166,000),when tests are performed on spot plate.Bismuth,cobaltous,nickelous,mercurous and silver ions interfere.Among them,Co++ and Ni++ heavily mask the reaction of Cu++.But the chelates of Ni++and Co++can be separated by extraction with CCI;or CHCl3,in which they are soluble,while the Cu++ chelate is insoluble.