| Titre : |
Quantifying uncertainty for the determination of formaldehyde in leather by colorimetric method |
| Type de document : |
texte imprimé |
| Auteurs : |
Rajkumar Dewani, Auteur ; Farman Ahmed, Auteur ; Muhammad Saleemuddin, Auteur ; Munawwer Rasheed, Auteur ; Muhammad Kashif Pervez, Auteur ; Sarwat Jahan Mahboob, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 384-393 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Colorimétrie
Cuir -- Teneur en formaldéhyde
Cuirs et peaux -- Analyse
Dichromate de potassium
Etalonnage
Incertitude de mesure
Volumétrie (chimie analytique)
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The uncertainty in the analysis of formaldehyde in leather by colorimetric method was investigated and estimated according to ISO 17025 requirements. A total of sixteen various components contributing to the uncertainty of analysis result were identified and quantified, with separate uncertainty budgets. Among them, seven were related to volumetric measurements whereas the other nine were non volumetric. The study suggests that repeatability holds the largest uncertainty followed by formaldehyde recovery and standard calibration curve, while molecular weight and purity of potassium dichromate held the lowest uncertainty. Under carefully controlled experimental conditions the expanded uncertainty of the result is found to be plus or minus 0.676 mg/kg for a mass fraction of 30.73 mg/kg of formaldehyde in leather. Furthermore, the affect of uncertainty contribution from standard calibration curve and extraction temperature on the expanded uncertainty is explored to formulate valid suggestions for regulating the combined standard uncertainty. |
| Note de contenu : |
- ANALYTICAL PROCEDURE : Definitionof the measurand - Identification of uncertainty sources - Non-volumetric sources - Volumetric sources
- EXPERIMENTAL : Standards and reagents - Calibration - Application example - Bias study - Additional aspects |
| En ligne : |
https://drive.google.com/file/d/15iGpLQCQ9w7qg3bDE8W7K_JS1y4V6IsK/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16522 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 11 (11/2012) . - p. 384-393
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Quantifying uncertainty for the determination of formaldehyde in leather by colorimetric method in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 11 (11/2012)
