| Titre : |
An analytical method for determining formates in chrome recycling liquors |
| Type de document : |
texte imprimé |
| Auteurs : |
Elton L. Hurlow, Auteur |
| Année de publication : |
1988 |
| Article en page(s) : |
p. 19-26 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Recycled chrome tanning liquors containing formate as masking agent have to be accurately fortified betweencycles to ensure consistent results. Up to now, residual formate concentrations have been guessed at because there has been no easy, quantitative assay for formate insuch recycle liquors.This work derives a suitable gas chromatographic method which measures formate directly using thermal conductivity detection.
Temperature and pH are shown to affect the elution profile and it was found best to separate formate on a poropak N column from a filtered (0.45 µm) solution at a pH>2 and oven temperature of 160°C. Unknown formate concentrations are read off directly from a linear, standardised graph. The measurements were shown to be quantitative and the method easy to perform. |
| En ligne : |
https://drive.google.com/file/d/1mdYr5eD-yXPqRlFiPXeptJK06OR0ww97/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9090 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 72 (Année 1988) . - p. 19-26
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An analytical method for determining formates in chrome recycling liquors in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
