Acta Chimica Sinica ›› 1980, Vol. 38 ›› Issue (5): 441-449. Previous Articles     Next Articles

痕量砷在金膜电极上阳极溶出伏安法的研究

邓家祺, 陈晓明, 何佩鑫   

  1. 复旦大学化学系
  • 投稿日期:1978-11-15 发布日期:2013-06-03

A STUDY OF ANODIC STRIPPING VOLTAMMETRY OF TRACE ARSENIC ON GOLD FILM ELECTRODE

DENC JIA-QI, CHEN XIAO-MING, HE PEI-XIN   

  1. Department of Chemistry, Fudan University, Shanghai
  • Received:1978-11-15 Published:2013-06-03

This paper reports the anodio stripping voltammetry of traoe amount of arsenio on the gold film whioh is depositeal on a glassy graphite eleotrode.In 1 M sulfuric acid medium,it shows a peak of stripping ourrent of arsenic at +0.15V+0.25 V(vs.1N.Ag-AgCl).A linear relation between the peak height and the ooncentration of arsenic in the range of 1.0×10-9M to 6.0×10-6M was observed,the sensitivity of this method is about 200 times:Eligher than that of the oolorimetry of arsenic with silver diothyldithio-carbamate.On the other hand,we havo studied the eleotrode process with the triangle cyolic voltammetry.It shows that the electrode reaction is irreversible and tho deposition of arsanio on the gold film electrode is probably due to the formation of intarmetallic compound of arsenic with gold.