DETERMINATION OF MOISTURE-CONTENT OF MUSHROOMS BY VIS NIR SPECTROSCOPY

Citation
S. Roy et al., DETERMINATION OF MOISTURE-CONTENT OF MUSHROOMS BY VIS NIR SPECTROSCOPY, Journal of the Science of Food and Agriculture, 63(3), 1993, pp. 355-360
Citations number
22
Categorie Soggetti
Agriculture,"Food Science & Tenology
ISSN journal
00225142
Volume
63
Issue
3
Year of publication
1993
Pages
355 - 360
Database
ISI
SICI code
0022-5142(1993)63:3<355:DOMOMB>2.0.ZU;2-X
Abstract
Feasibility of the determination of the moisture content of intact ind ividual mushrooms (Agaricus bisporus) by visible and near infrared ref lectance spectroscopy (Vis-NIR) was studied. The convection drying met hod was found to be suitable to obtain reference values for the calibr ation equation. The standard error of the laboratory procedure ranged from 0.16 to 0.42%. Modified partial least square regression was used to develop the calibration equations. The importance of different segm ents of wavelength, the effect of light scattering and the use of data processing on the prediction of moisture content were evaluated. The equation obtained using the wavelength segment 600-2200 nm with first derivative and scatter correction had the best performance with a stan dard error of cross-validation of 0.64%. This equation performed very well when validated using a separate set of mushrooms of the same kind as those in calibration set. This equation, however, did not perform well when using mushrooms from a different treatment. Accuracy of pred iction was re-established by adding typical spectra from the second gr oup of mushrooms to the calibration set and performing recalibration.