Abstract
Conditions for the spectrophotometric determination of copper with 2,9-dimethyl-l,10-phenan-throline (neocuproine) in the presence of ascorbic acid in a water-ethanol solution (9 : 1) at pH 4.5–5.0 have been found. The detection limit is 3 x 10-6 M. The concentration range is from 4.4 x 10-6 to 3 x 10-4 M. Conditions for the determination of copper(I) with neocuproine by thermal lens spectrometry have been proposed. The detection limit is 4 x 10-7 M. The concentration range is from 7 x 10-7 to 6 x 10-5 M. Iron(II) at concentrations as high asn x 10-4 M does not interfere with the determination of copper. Changes in the conditions for the photometric reaction associated with passing from spectrophotometric measurements to thermal lensing are discussed.
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Chernysh, V.V., Proskurnin, M.A., Dzyabchenko, A.A. et al. Determination of copper with neocuproine by thermal-lens spectrometry. J Anal Chem 55, 338–343 (2000). https://doi.org/10.1007/BF02757768
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DOI: https://doi.org/10.1007/BF02757768