| Titre : |
A fast method to determine trace chromium(III) ion in chrome tanning and chrome tanning waste |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhaoli Wang, Auteur ; Zhang Xinshen, Auteur ; Hong Dai, Auteur ; Yajun Luo, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 113-115 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chimie -- Essais et réactifs
Chimie analytique
Chrome trivalent -- Oxydation
Ions chrome
Tannage -- Déchets
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Large amounts of chromium (III) ion interfere with the determination of trace amounts of chromium (VI) ion in chrome tanning agents. Therefore, a new method was proposed for determination of trace chromium (III) in chrome tanning products and chrome tanning wastes by automatic reference flow injection. After chromium (III) is oxidised to chromium (VI) by potassium periodate, it can be determined by the flow injection function of an automatic metallic elements analyzer using diphenyl carbazide as the colour developing reagent and potassium periodate as the oxidant solution. The effect of the concentration of potassium periodate and the length of the reaction coil were investigated. Under the optimum conditions, the linear range and RSD of the method were 1.00-100ug/ml and 0.84% respectively. The method was applied to the analysis of chrome powder with recoveries ranging from 95.0% to 103.0%. The results satisfy the requirements of the determination. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Chemical reagents - Apparatus - Preparation of solutions - Analytical procedure - Preparation of the samples
- RESULTS AND DISCUSSION : Choice of the absorption wavelength - Choice of length of reaction coil - Choice of oxidant solution - Test of linearity and precision - Recovery tests and analysis of the samples - Analysis of coexisting Chromium (III) ion and Chromium (VI) ion
- Table 1 : Precision test
- Table 2 : Recovery percentage of Chromium (III) ion
- Table 3 : Analytical resuls of samples |
| En ligne : |
https://drive.google.com/file/d/169F8rw7HgmbKSDJz-yOYpO93MUp5fRjS/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39638 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 3 (05-06/2004) . - p. 113-115
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A fast method to determine trace chromium(III) ion in chrome tanning and chrome tanning waste in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)
