Abstract
A new spectrophotometric method has been applied to the determination of zinc in bottled mineral water (with and without gas), refreshments, vinegar, and table salt. The method introduces the 1-[di-(2-pyridyl)-methylidene]-5-(salicylidene)-thiocarbo hydrazone (DPST) as chromogenic reagent. This procedure is simple, rapid, reproducible and does not demand costly outfit and chemicals.
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