| Titre : |
Determination of Cr(VI) content in leather with anodic stripping voltammetric polarography |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhu Zhengxin, Auteur ; An Xun, Auteur ; Zhang Zongcai, Auteur ; Dai Hong, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 255-258 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuir -- Teneur en chrome hexavalent
Cuirs et peaux -- Analyse
Micro-ondes
Peroxyde d'hydrogèneLe peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales.
Voltampérométrie
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
An anodic stripping voltammetric method has been developed for determination of Cr(VI) content in leather treated with nitric acid-hydrogen peroxide microwave digestion. Microwave digestion was used in sample preparation for its fast digestion, lower reagent consumption and safe operation. The sample solution was mixed with DTPA (diethylenetriaminepentaacetic acid)-sodium acetate-sodium nitrate buffer solution, and then it was purged with oxigen free nitrogen for 300 seconds before deposition of the metals was carried out by applying a constant potential versus Ag/AgCl to the hanging mercury drop electrode (HMDE) for 60 seconds. A standard addition procedure was used for quantification. The repeatability and recovery percentage were tested to evaluate the determination methods. The results showed that Cr(VI) content in leather sample determined was 0.68mG/kG. Relative standard deviations for 8 replicate determinations of µg/L Cr(VI) standard solution and leather samples were carried out and the precision test results were 1.338 and 7.47 % respectively. recovery percentage was in the range from 97.22 % to 106.58 %. The proposed method is simple, convenient, sensitive and reliable. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURE : Apparatus - Chemical reagents and materials - Ready-to-use solutions - Sample preparation - Voltammetric analytical procedure
- RESULTS AND DISCUSSION : Effect of operational parameters - Tests of Cr(VI) leather samples |
| En ligne : |
https://drive.google.com/file/d/1rDu2ynaD5pxZdS-c5sDwWDOAx0nfDpwd/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12880 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 6 (11-12/2011) . - p. 255-258
Aller sur edunet
Accueil
Determination of Cr(VI) content in leather with anodic stripping voltammetric polarography in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 6 (11-12/2011)
