Abstract
A simple, rapid, sensitive, and selective method for the simultaneous determination of gallium and zinc using derivative synchronous fluorescence spectrometry has been studied. This determination is based upon the formation of fluorescent complexes with salicylaldehyde thiocarbohydrazone (SATCH). The reaction is carried out at pH 4.7 in aqueous-ethanol medium (52% (v/v) ethanol). The use of second-derivative synchronous fluorescence spectrometry permits the simultaneous determination of gallium and zinc in the concentration intervals of 2-40 and 20-1500 ng/mL, respectively. The effect of interferences was studied. The method has been applied to the determination of gallium and zinc in biological samples (after destruction of the organic matter by using a HNO/sub 3/-H/sub 2/O/sub 2/ mixture), wine, drinking water, and wastewater.
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