Abstract

This paper introduced an approach of using diphenylthiocarbazone-chloroform benzene mixed solvent to determine silver content in the ore by extraction colorimetric method. Ammonium chloride-sodium chloride was used for sample melting, and hydrochloric acidic water was adopted to digestion. Then, some parts of the interference elements were separated from it. Silver was dissolved quantitatively out of the ore, and formed complex negative ion of [AgCl-in the liquor. Chloroform-benzene mixed solvent as extraction solvent of diphenylthiocarbazone could improve the stability of diphenylthiocarbazone and silver complex, thus it could raise the accuracy and precision, simplify the operate procedure, and also avoid that phosgene pollute to the environment.

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