Direct determination of beryllium, copper and zinc in AlU matrices by electrothermal atomization atomic-absorption spectrometry.
An atomic-absorption spectrometric method with electrothermal mode of atomization has been developed for the direct determination of Be, Cu and Zn in AlU (3:1) matrix samples without prior chemical separation of the major matrix. The studies carried out include the effect of the matrix on the analyte absorbance, optimization of sample aliquot and other experimental parameters, and analysis of a number of synthetic samples. Nanogram amounts of the analytes can be determined with a solution aliquot of 5 microlitres containing 25 micrograms of the sample with a precision of 6% or better. The analytical range obtained for these analytes is Be: 2-20 mug/l., Cu: 20-200mug/l. and Zn: 1-40mug/ml in the AlU matrix. The analysis of synthetic samples has shown good agreement with their added contents.
Goyal
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Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Bombay 400 085, India.
Purohit
P J
PJ
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Sastry
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