L. R. Schimleck, Y. Yazaki
Analysis of Black Wattle (Acacia mearnsii De Wild) Bark by Near Infrared Spectroscopy
Summary
The analysis of two sets of Acacia mearnsii De Wild (Black Wattle) samples by near infrared
(NIR) spectroscopy is reported. Set 1 samples were characterised in terms of hot water extractives,
Stiasny value and polyflavanoid content. Set 2 samples were characterised by nine different parameters,
including tannin content. NIR spectra were obtained from the milled bark of all samples
and calibrations developed for each parameter. Calibrations developed for hot water extractives
and polyflavanoid content (set 1) gave very good coefficients of determination (R2) and performed
well in prediction. Set 2 calibrations were generally good with total and soluble solids, tannin
content, Stiasny value-2 and UV-2, all having R2 greater than 0.8. Owing to the small number of
set 2 samples, no predictions were made using the calibrations. The strong relationships obtained
for many parameters in this study indicates that NIR spectroscopy has considerable potential for
the rapid assessment of the quality of extractives in A. mearnsii bark.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 57, 08/2003
Pages: 527 - 532
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