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化学学报
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化学学报 ›› 1959, Vol. 25 ›› Issue (2): 106-109. 上一篇    下一篇

论文

双铂极电流滴定法同时测定锑和砷

杨南生1, 田青娟2, 高小霞2   

  1. 1. 沈阳冶炼厂;
    2. 北京大学化学系
  • 投稿日期:1959-01-20 发布日期:2013-06-03

SIMULTANEOUS TITRATIONS OF ANTIMONY AND ARSENIC WITH THE“DEAD STOP END-POINT”

YOUNG NAN-SUN1, TIEN TSING-CHUAN2, KAO SHEAU SHYA2   

  1. Chemistry Department, Peking University
  • Received:1959-01-20 Published:2013-06-03

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兹将用硫酸铈分别滴定锑、砷的终点改用双铂极指示.在6M酸和0°下滴定锑, 在室温, 4M盐酸和氯化碘(催化剂)存在下滴定砷.并拟出阳极泥分析方法.分析结果与锑、砷分离后个别滴定所得数据相符合, 而时间只需三小时.

The "dead-stop end-point" method of Foulk and Bawdon has boon found very convenient for the simultaneous determination of antimony and arsenic without previous separation.Coric sulfate solution is used as titratant.Antimony is dotermined first in 6 M HCl solution at 0℃.At this temperature the Sb(Ⅲ)-sh(Ⅴ)system is reve}ible while Ae(Ⅲ)-As(V) not.Then the solution is adjasted to 4 M HCl and warmed to room tempratnre with the addition of ICl as catalyst to render the As(Ⅲ)-As(Ⅴ) system reversible and the titration Boos on until all anionic present is oxidized.