| Titre : |
Determination of formaldehyde content in leather : standard EN ISO 17226 (parts 1 and 2), revision and possible improvements |
| Type de document : |
texte imprimé |
| Auteurs : |
Sara Cuadros, Auteur ; Joaquim Font, Auteur ; Francina Izquierdo, Auteur ; Rosa M. Cuadros, Auteur ; Lluis Ollé, Auteur ; Agusti Marsal, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 167-174 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuir -- Teneur en formaldéhyde
Cuirs et peaux -- Analyse
Extraction (chimie)
Normalisation
Surfactants
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The retanning process is the main application of formaldehyde in the tanning industry since formaldehyde participates in two groups of synthetic organic tanning agents: syntans and resins. Resins can be hydrolysed with the result that formaldehyde is released. Thus, formaldehyde in leather can be free or from hydrolysis of resins. Due to the carcinogenic character of formaldehyde, its presence in leather should be avoided or should be below allowable limits. The EN ISO 17226 Standard is the Official Standard for the determination of formaldehyde content in leather, which, in the authors' opinion, presents certain ambiguities in the wording of some operations included in their analysis methods and, some of these operations, are susceptible of improvement. Therefore, a revision of the EN ISO 17226 Standard (Parts 1 and 2) is carried out in this work and, in particular, of the extraction phase of formaldehyde present in leather (possible use of alternative surfactant and shaking method) ; reaction time between the extracted formaldehyde with the dinitrophenyihydrazine solution (Part 1 of the Standard) and stability of the acetylacetone solution (Part 2 of the Standard). |
| Note de contenu : |
- AIM OF THE WORK
- MATERIALS AND METHODS : Starting material. Formulation applied - Methods. Determination of formaldehyde in leather
- EXPERIMENTAL PROCEDURES : Revision of the EN ISO 17226 standard
- TABLES : 1. Current limits for formaldehyde in differents countries - 2. Current limits for formaldehyde in accordance with the "Restricted Substances Lists" (RSL) of major brands - 3. General formulations for different treatments carried out - 4. Formaldehyde content in samples extracted with sodium dodecyl sulphate or sodium dodecyl sulphonate for different retanning treatments. Quantification of formaldehyde by HPLC - 5. Formaldehyde content iin samples extracted with sodium dodecyl sulphate or sodium dodecyl sulphonate for different retanning treatments. Quantification of formaldehyde by colourimetry - 6. Formaldehyde content in samples using magnetic agitation or reciprocal linear agitation in the extraction phase for different retanning treatments (ISO 17226:2) - 7. Formaldehyde content in samples using fresh or aged acetylacetone solution for different retanning treatments. Quantification by colourimetry |
| En ligne : |
https://drive.google.com/file/d/1kN8neLZ3EgiEoFOJj3irrOLrLrHhCFiD/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26793 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 100, N° 4 (07-08/2016) . - p. 167-174
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Determination of formaldehyde content in leather : standard EN ISO 17226 (parts 1 and 2), revision and possible improvements in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 100, N° 4 (07-08/2016)
