Solid-Liquid Separation after Liquid-Liquid Extraction -Spectrophotometric Determination of Zinc and Nickel after Extraction of their Oxinate with Molten Naphthalene-

摘要

The method is presented for the spectrophotometric determination of traceamounts of metal after extraction with molten naphthalene. Zinc and nickelreact with 2-methyloxine to form a stable yellow complex，which is extractedinto mo1ten naphthalene at 90℃. The resu1ting mixture of complex and naphthaleneis dissolved in dimethylformamide and the absorbance of the solution ismeasured under the recommended conditions. Effects of pH，amounts of 2-methyloxine，naphthalene and diverse sa1ts are studied.