The determination of silicon, zinc and magnesium in gallium arsenide by neutron-activation analysis

Abstract

The use of short-lived isotopes in the determination of trace amounts of impurities in gallium arsenide is deslxibed. Methods are presented for determining silicon, zinc and magnesium. The effect of thermal neutron self -shielding in the determination of silicon and magnesium has been investigated and shown to be insignificant.

Ion Exchange Chromatography

“…Fritz and Abbink (71) used cation exchange in acetone-water-HC1 solutions to concentrate traces of nickel and copper in salts of Cd, Zn, and Fe(III) which were absorbed only weakly in this medium. Two papers (88,121) describe determination of impurities in gallium arsenide, removing the major constituents by ion exchange and solvent extraction. A new technique for separating trace impurities from certain chloride salts is precipitation ion exchange (289).…”