| Titre : |
A reliable detection method for Cr(VI) in dyed leathers by Ion chromatography |
| Type de document : |
texte imprimé |
| Auteurs : |
Rama Jeevan Ganesh Jeevan, Auteur ; Ganga Radhakrishnan, Auteur ; Raghavan Chandrasekar, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 344-350 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Cr(VI) detection without false positives in coloured (dyed) leather is an important issue. Several studies have highlighted the problems faced and the unreliability of the present official procedures viz. IUC-18, DIN 53314 and EN 420 especially when applied to coloured leathers. This is due to colourants soluble in the extractant interfering seriously when analysed by visible spectrophotometry. In the present study a method has been developed which targets cleaning of the matrix elements mainly dye in the first step, followed by ion chromatography with post column derivatization using DPC (1,5-diphenylcarbazide). The method is found to work with greater reliability, as ascertained from several Cr(VI) spiked studies on deliberated matrix preparations constituting Cr(III) and dyes. The study included analyses of several coloured leathers, and their spiked leather extracts and comparison of official procedures with IC (Ion chromatography) involving wet blue and light coloured leathers. |
| En ligne : |
https://drive.google.com/file/d/1f9HemdmW4h26JPj3zveWUkKvA8m8Qykm/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4150 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 9 (09/2003) . - p. 344-350
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