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An atomic absorption spectrophotometric method for the determination of trace copper after adsorption of its 1-nitroso-2-naphthol-3,6-disulfonic acid chelate on Ambersorb 572 has been developed. This chelate is adsorbed on the adsorbent in the pH range 1-8. The copper chelate is eluted with 5ml of 0.1moll -1 potassium cyanide and determined by flame atomic absorption spectrometry (FAAS)...
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