| Titre : |
Tannin analysis by near infrared spectroscopy |
| Type de document : |
texte imprimé |
| Année de publication : |
1995 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Acacia et constituants
Ecorces
Spectroscopie infrarouge proche
Statistique
Tanins -- analyse
Tanins végétaux
|
| Index. décimale : |
675.2 Préparation du cuir naturel. Tannage |
| Résumé : |
The use of near infrared spectroscopy (NIRS) is demonstrated to be an important alternative to the empirical and laborious traditional methods for tannin analysis of the bark of black wattle (Acacia mearnsii De Wild.), particularly when large numbers of samples have to be processed rapidly.
A set of 98 ground wattle bark samples was used to calibrate the output from a NIRS instrument, taking absorption readings every 2 nm between 1100 nm and 2498 nm. The spectral data from this calibration set was then statistically manipulated using multivariate techniques to generate calibration models. These calibrations were then applied to a separate set of 79 bark samples which, for validation purposes, were also analysed by wet chemistry. The tannin analysis predictions compared favourably with the wet chemistry results on these samples, with standard errors of determination of 1.2%, 0.3% and 1.1% for tans, non-tans and total extractives respectively. |
| Note de contenu : |
- MATERIALS AND METHODS : Sample preparation - Analysis - Statistical analysis
- RESULTS AND DISCUSSION : Spectral characteristics of bark components
- Table 1 : Characteristics from classical wet chemistry
- Table 2 : Calibration and validation statistics obtained for tans, non-tans and total extractives using partial least squares regression on first derivative transformation of spectral data (PCs = principle components ; SED square error of determination)
- Table 3 : Spectral characteristics of bark components |
| En ligne : |
https://drive.google.com/file/d/1lj2fjUM8ieQnDb6Bvh-3mCGDFdPG1TZl/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40049 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 79, N° 1 (01-02/1995)
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Tannin analysis by near infrared spectroscopy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 1 (01-02/1995)
