SPECTROPHOTOMETRIC ANALYSIS OF ANIONIC LEATHER DYES AS ION-PAIRS

Authors
MURALIDHARAN D RAO VSS
Citation
D. Muralidharan et Vss. Rao, SPECTROPHOTOMETRIC ANALYSIS OF ANIONIC LEATHER DYES AS ION-PAIRS, Journal of the Society of Leather Technologists and Chemists, 79(4), 1995, pp. 119-122
Citations number
22
Categorie Soggetti
Materiales Science, Textiles
Journal title
Journal of the Society of Leather Technologists and Chemists → ACNP
ISSN journal
01440322
Volume
79
Issue
4
Year of publication
1995
Pages
119 - 122
Database
ISI
SICI code
0144-0322(1995)79:4<119:SAOALD>2.0.ZU;2-N
Abstract
Extraction of dyes from leather followed by spectrophotometric analysi s is of technical and commercial importance. During the extraction pro cess, vegetable tannins are co-extracted with the dyes and interfere d uring the subsequent spectrophotometric estimation of dyes. The interf erences caused by vegetable tannins are eliminated by separating the a nionic leather dyes as ion-pairs with tetra n-butylammoniumchloride in chloroform from the dye-tannin mixtures in 50% aqueous dimethylformam ide prior to analysis.