[article]
| Titre : |
Study of the qualitative and semi-quantitative analysis of grape seed extract by HPLC |
| Type de document : |
texte imprimé |
| Auteurs : |
Silvia Sorolla, Auteur ; Antonia Flores, Auteur ; Trini Canals, Auteur ; Rosa Cantero, Auteur ; Joaquim Font, Auteur ; Lluis Ollé, Auteur ; Anna Bacardit, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 88-93 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse quantitative (chimie)
Chromatographie en phase liquide à hautes performances
Pépins de raisins
Raisin et constituants
Tanins -- analyse
Tanins végétaux
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The main aim of this study is to carry out a qualitative and semi-quantitative analysis of tannin extracts as an alternative to the official analysis method ISO 14088 – IUC 32, so that a correlation between the two methods is established.
From the point of view of the chemical composition, tannins are classified into two major groups :
i) condensed tannins, also called flavanols or catechins, and ii) hydrolysable tannins, also called pyrogallic tannins.
Today, the most widely used conventional extracts are quebracho, mimosa, chestnut, and tara. Quebracho and mimosa are condensed tannins, whereas chestnut and tara are hydrolysable tannins.
The following extracts were used in this study: tara powder, commercial mimosa and quebracho extracts and extracts derived from grape seed, containing both condensed and hydrolysable extracts.
The development of this new method will allow a faster and less expensive estimate of the amount of tannins present in a tannin extract. |
| Note de contenu : |
- MATERIALS AND METHODS : Introduction - Obtaining grape seed extract - HPLC method for determination of tannins
- RESULTS AND DISCUSSION : Analysis of patterns - Analysis of tannin extracts
- FIGURES : 1. Typical UV-Vis spectrum of catechin compounds - 2. Typical UV-Vis spectrum of gallotannins - 3. Correlation between standard filter method ISO 14088-IUC 32 and total of peak areas by HPLC - 4. Grapetan chromatogram, PP2 sample |
| En ligne : |
https://drive.google.com/file/d/1MyW25Rv0f6NbpHMtTDEDf9s4PAp5Wx1c/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30275 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 3 (03/2018) . - p. 88-93
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