Pulse Polarographic Determination of Ytterbium in Minerals

✍ Scribed by E. Steeman; E. Temmerman; F. Verbeek

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 182 KB
• Volume: 86
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19770860703

✦ Synopsis

Abstract

Differential pulse polarography was used for the quantitative determination of ytterbium(III) in minerals and oxides of other lanthanides. As the reduction occurs at fairly negative potentials and the reduction of hydrogen ions interferes at low pH the number of suitable supporting electrolytes is limited. At pH > 6 hydrolysis effects cause the reduction peak current to decrease as a function of time. Down to 5.10^−‐8^ M ytterbium(III) can be determined in the supporting electrolyte LiCl (0.1 – 1 M) at pH 5. The analysis of ytterbium(III) in commercial samples showed average relative standard deviations which do not exceed 7%.