| Titre : |
Elimination of chromium oxidation for effective chromic oxide detections |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Hooks, Auteur ; Michelle Hayes, Auteur ; Ralph Maendle, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 420-424 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux
Cuirs et peaux -- Analyse
Cuirs et peaux -- Teneur en oxyde de chrome
Oxydes de chrome
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Inductively Coupled Plasma Optical Emission Spectrophotometer (ICP-OES) was used to accurately determine the Chromic Oxide content in 90 total Wet Blue, Crust, and Finished Leather samples. Accuracy was verified on each sample by testing retained composite material using ASTM D2807 Perchloric Digestion / Sodium Thiosulfate Titration Method. The ICP-OES Method correlated to ASTM D2807 with less than 2% deviation from the averaged mean value and less than 3% deviation from the averaged standard deviation value. The Chromic Oxide mean values for ASTM D2807 and ICP-OES were 3.11 ± 0.70% and 3.17 ± 0.68% respectively. The new method maintains a highly consistent statistical capability with Cpk at 2.15 vs. 2.17. Oxidation of chromium in leather samples is not required for chromic oxide detection. Perchloric acid more than doubles the required consumables cost, test time and hazard required to validate chromic oxide levels in leather materials. The ICP-OES method eliminates the crystal formation explosion hazard and chlorinated waste environmental hazards associated with Perchloric acid. Replacing ASTM D2807 with the proposed method by tannery validation laboratories is cheaper, faster, safer and more environmentally sustainable than titration by our classic technique. |
| En ligne : |
https://drive.google.com/file/d/1ETa6HwTeBJR48nR46IX3fUftznpIO77j/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25052 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 12 (12/2015) . - p. 420-424
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