A fast method to determine trace chromium(III) ion in chrome tanning and chrome tanning waste / Zhaoli Wang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 88, N° 3 (05-06/2004)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 88, N° 3 (05-06/2004) . - p. 113-115 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 [article]

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