The Identification of Some Acid Disazo Dyes by Paper Electrophoresis of their Reduction Products
- 1 January 1964
- journal article
- research article
- Published by Taylor & Francis in Stain Technology
- Vol. 39 (1) , 7-12
- https://doi.org/10.3109/10520296409061201
Abstract
Trypan blue, Niagara blue 2B, Niagara blue 4B, Afridol blue, Evans blue, Niagara sky blue 6B, Niagara blue 5B and Chlorazol blue G cannot be distinguished by their colour or their behaviour on paper chromatography. They may, however, be identified by paper electro-phoresis at pH 4 of the products obtained by reduction of the azo linkages with sodium dithionite (Na2S2O4).Keywords
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