1,2-Naphthoquinone-2-thiosemicarbazone as a new acid-base indicator in isopropyl and tert-butyl alcohol media.
1,2-Naphthoquinone-2-thiosemicarbazone is proposed as an acid-base indicator for use in isopropyl and tert-butyl alcohol media. The dissociation constants have been determined in both media and the colour transition, sensitivity and sharpness of the indicator are described by means of chromatic parameters. The indicator has been used for determination of some organic acids, with errors of less than 1%.
Bosch
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Department of Analytical Chemistry, University of Barcelona, Avda. Diagonal 647, 08028 Barcelona, Spain.
Roses
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