Constant-current enhanced potentiometric stripping analysis

✍ Scribed by Youqin Zie; Calvin O. Huber

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 569 KB
• Volume: 263
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85426-7

✦ Synopsis

Constant-current enhanced potentlometnc stnppmg analysis (CCEPSA) IS slmdar to potentlometnc stnppmg analysis (PSA) except that durmg the stnppmg step m CCEPSA a cathodic current IS Imposed on the electrode system The freshly oxldlzed metal ions m the vuzunty of the electrode surface are partially redeposlted so that the stnppmg tune IS extended The stnppmg time and potential-time equations for CCEPSA were denved and verified usmg the stnppmg of cadmmm(II) Under the most favorable condltlons, the sensltlvlty of cadmmm(I1) determmatlon was enhanced by a factor of 15 Keyword.s Potentlometry, Cadmmm, Constant-current enhanced potenhometnc stnppmg analysis ' Present address Dwlslon of Chemistry and Chemical Englneermg, Mall Code 127-72,