| Titre : |
Further studies on the official methods of analysis for determination of hexavalent chromium level in leather |
| Type de document : |
texte imprimé |
| Auteurs : |
Dipankar Chauduri, Auteur ; Ratna Chakraborti, Auteur ; Pinaki Bhattacharya, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 388-399 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
This study was carried out primarily to have a better understanding of some of the reported limitations of the official methods of analysis for determining the level of Cr(VI) in leather. In this investigation the stability of Cr(VI) and Cr(III) was tested in several potential extractants and leather extracts. But no redox reactions could be observed in any of the liquors tested. Experiments were also conducted to determine the optimum stirring time for complete extraction of Cr(VI) from leather. The results reveal that a stirring time of 3 hours is insufficient for full chrome leather. In order to determine the kind of change necessary in the extraction procedure to avoid the potential oxidation of Cr(III) during extraction, experiments were also conducted on extraction with phosphate buffer for different time intervals under various pH conditions. The results indicate that more reliable analytical results may be obtained by extracting the sample for 6 hours with phosphate buffer at pH 6.4-6.6. |
| En ligne : |
https://drive.google.com/file/d/1IcXFPvLBEkR71CdqEFFAAMV953RazfqC/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4153 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVIII, N° 10 (10/2003) . - p. 388-399
Aller sur edunet
Accueil
Ajouter le résultat dans votre panier Affiner la rechercheFurther studies on the official methods of analysis for determination of hexavalent chromium level in leather in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVIII, N° 10 (10/2003)
