首页 | 本学科首页   官方微博 | 高级检索  
     


Kinetic study of the reduction of hydroxylamine by Cu(I)
Authors:Renato Tomat  Adelio Rigo
Affiliation:Laboratorio di Polarografia ed Electrochimica Preparativa del Consiglio Nazionale delle Ricerche, Via Monte Cengio 33, 35100 Padua (Italy);Istituto di Chimica Fisica dell''Università di Venezia, Ca'' Foscari, 30100 Venice (Italy)
Abstract:We have studied the reduction of SeIV in acidic medium (1 M HCl and 1 M HClO4) by classical and alternating current polarography and single sweep linear voltammetry with dropping mercury electrode and hanging mercury drop (HMDE). Two steps are observed distinctly: (1) The reduction of SeIV→Seo leads to a deposit of adsorbed elementary selenium. A mathematical expression is shown for the variation of current which is related to the surface covered at the HMDE. (2) The second step is the reduction of Seo→Se2? which takes place at more negative potentials. The accumulation of Seo may be used for the determination of traces in trace analysis by cathodic stripping. It appears that the behavior of selenium in these two mineral acids is similar. But sometimes it behaves in a different manner, especially in a.c. polarography (in this connection the influence of frequency and demodulation angle are important).
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号