| Titre : |
Inter-laboratory study on hexavalent chromium determination in dyed skins |
| Type de document : |
texte imprimé |
| Auteurs : |
T. Rius, Auteur ; Joaquim Font, Auteur ; Rosa M. Cuadros, Auteur ; Sara Cuadros, Auteur ; M. Santiago, Auteur ; E. Verdù, Auteur ; Agusti Marsal, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 277-283 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuir -- Teneur en chrome hexavalent
Cuir teint
Cuirs et peaux -- Analyse
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The aim of this work is to implement a new method for the determination of the chromium (VI) content in dyed leather. A collaborative study was carried out by four Spanish laboratories to test the method, which analyses the chromium (VI) content in the extracted solutions from leather under predetermined conditions.
The well-known IUC 18 method shows deficiencies when applied to coloured leather. Thus, the new method is a modification of that. The new procedure is described in the WI 00289055 European Draft Standard, and it was developed by the CEN/TC 289 Committee. In the new method, the leather extract is decoloured by solid phase extraction in order to eliminate all the coloured substances that may interfere in the spectrophotometric detection of chromium (VI). Two commercial C18 solid phase extraction cartridges were also compared in the present study. The method was validated by applying the part 2 of the ISO 5725 Standard ("Basic method for the determination of repeatability and reproducibility of a standard measurement method") to the results obtained.
The implementation of the new method was successful given that it obviated the need for expensive instruments and produced results that were more robust and reproducible than those achieved with the existing standard method. |
| Note de contenu : |
- INTRODUCTION : Aim of the work - New analytical method for the chromium (VI) content determination in dyed skins
- EXPERIMENTAL : Inter-laboratory study - Validation of the method. Application of the ISO 5725 standard - Comparison of two commercial cartridges
- RESULTS AND DISCUSSION : Chromium (VI) content determined in the inter-laboratory study - Data analysis. Application of the ISO 5725 standard for the validation of the method - Compariçson of two commercial cartridges
- Table 1 : Results from 5 analyses for Cr(VI) in each skin
- Table 2 : Averages and statistical characteristics of the results
- Table 3 : Form C : Absolute differences within cells
- Table 4 : Results of the anlaysis using DIONEX cartridges
- Table 5 : Results of the analysis using WATERS cartridges
- Table 6 : Comparison of absorbance values obtained on solutions decouloured with commercial cartridges |
| En ligne : |
https://drive.google.com/file/d/1aFoSEl0e2kMK37JT9XcfwLEKVC3-HuWy/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39789 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. XCVII, N° 7 (07/2002) . - p. 277-283
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Inter-laboratory study on hexavalent chromium determination in dyed skins in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XCVII, N° 7 (07/2002)
