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TitleThe colorimetric determination of copper with 2,2-diquinolyl in minerals and ores
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorGuest, R J
SourceCanada Department of Mines and Technical Surveys, Mines Branch, Technical Paper no. 3, 1953, 18 pages, Open Access
logo Open Access
PublisherCanada Department of Mines and Technical Surveys
File formatpdf
Subjectsgeneral geology; geochemistry; Science and Technology; copper; copper geochemistry; minerals; ore mineral genesis; Experiments
Illustrationsfigures; tables
Released1953 01 01; 2020 12 08
AbstractA colorimetric procedure for the determination of copper with 2,2-diquinolyl (cuproine) is described. The method is based upon the fact that cuproine forms an intensely coloured purple complex with cuprous ions, the colour of the complex bearing a linear relationship to the copper present. The reagent is specific for monovalent copper. Ions which are themselves coloured do not interfere as the copper-cuproine complex is extracted with amyl alcohol from a weakly acid solution. The effect of pH and shaking time on the extraction was found to be important. Optimum conditions for complete extraction of the complex are indicated. The method, being very rapid and simple in execution, is especially suited for routine work.

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