Gallium analytical determination

Analytical Scheme for Gallium and Germanium Determination in Coal... 

Sahayam, A.C., Jiang, S, Wan, C. (2004) Determination of ultra-trace impurities in high purity gallium arsenide by inductively coupled plasma mass spectrometry after volatilization of matrix. Journal of Analytical Atomic Spectrometry, 19,407-409. 

Trace determinations in different metal bases (e.g., lead, gallium, and indium) can make use of pre-concentration based on a partial dissolution of the matrix (see Ref [367]). Refractory metals such as molybdenum, niobium, tungsten, and tantalum powders are definitely difficult to dissolve or to keep in solution and require trace matrix separations to achieve a reliable volatilization of the analytes, e.g. in graphite furnace AAS. Here, slurry sampling electrothermal AAS, as has been extensively investigated for these matrices by Krivan et al. (see, e.g.. Refs. [227, 343, 344]), is a worthwhile alternative, especially as contamination is prevented and calibration by addition of aqueous aliquots of the analytes is often possible. 

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