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Determination of Gallium by the Tantalum Foil-Lined Graphite Furnace Atomic Absorption Spectrometry With Matrix Modifier

Yao Jinyu Wu Zhouan Zhi Guorui (Changchun Institute of Applied Chemistry,Academia Sinica,Changchun,130022)  
A method for the determination of gallium by the tantalum foil-lined graphite furnace atomic absorption spectrometry with vanadium and copper as mixed matrix modifier has been investigated.The tantalum foil-lined graphite tube was found to improve the sen- sitivity with 6-fold for gallium.Mixed matrix modifier can not only enhance the sensiti- vity,but also decrease the atomization temperature,and increase the ashing temperature, and eliminate the interferences.This method has been applied to the determination of gallium in GSD sample.The result obtained was agreement with reference value.
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