✦ LIBER ✦

A critical study on the determination of selenium in gallium arsenide by polarographic techniques

✍ Scribed by P. Lanza; S. Zappoli

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 658 KB
Volume: 185
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(86)80049-6

No coin nor oath required. For personal study only.

✦ Synopsis

A simple voltammetric method is described for the determination of traces of selenium in gallium arsenide. Differential-pulse cathodic stripping voltammetry permits a direct determination of selenium without preliminary enrichment or separation processes. Selenium can be determined down to levels of l-2 fig g-l, with relative standard deviations of about lo%, in < lOO-mg samples of gallium arsenide. Results for gallium arsenide doped with 7-75 rg g-' selenium agree in most cases with those obtained by spectrophotometry based on 4-chloro-o-phenylenediamine.

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