Abstract
Selective techniques have been developed for determination of nickel, cobalt, and zinc with 1-(2-pyridylazo)-2-napthol in waters with a lower boundary of determinable concentrations 0.01–0.02 mg/dm3. Reactions took place in micellar solutions of nonionic SAS. Selectivity of determination has been achieved thanks to the use of masking substances and a special procedure of mixing components. Iron does not hinder determination at the concentration < 5 mg/dm3.
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