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Acta Chimica Sinica ›› 1959, Vol. 25 ›› Issue (2): 106-109. Previous Articles     Next Articles

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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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.