Combining the Extraction with Galvanostatic Coulometry for Copper Determination in the Form of Mercaptoquinolinates
O. V. SHLYAMINA and G. K. BUDNIKOV
Butlerov Institute of Chemistry, Kazan' State University,
Ul. Kremlevskaya 18, Kazan' 420008 (Russia) E-mail: Shlyamina@mail.ru
Pages: 575-577
Abstract
Conditions for coulometric determination of copper (II) in an extract by titration with the electrogenerated bromine have been found. 8-Mercaptoquinoline has been suggested as a complexing agent, which forms complex of composition CuR2 with copper ions. Extraction was conducted in chloroform at ðÍ 6. The procedure is approved with synthetic mixtures and with samples of superficial waters. The lowest limit of detectable concentrations with the generating current intensity being 1.10-3 A and with time equal to 10 s comprises 5.10-7 M.
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