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V. M. Ivanov, M. G. Tsepkov, V. N. Figurovskaya

Optical, tsvetometric and acid-basic characteristics of methyl orange

Abstract

Are investigated optical and tsvetometric characteristics of 4-dimethylaminoazobenzen-4¢-sulphoacid (methyl orange, MO) in water solutions at pH 2–9. The equations calibration of the diagrams of dependence tsvetometric of functions from concentration are received and are calculated molare factors tsvetometric of functions. Spectrophotometric the method determines constants dissociation MO at ionic to force 0.01–0.2, they are given to ionic force 0 and are compared to the literary data. The advantages tsvetometry before spectrophotometry are shown at determination of concentration MO.
Moscow University Chemistry Bulletin.
2010, Vol. 51, No. 6, P. 445
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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