Development of a Portable near Infrared Sugar-Measuring Instrument
- 1 January 2002
- journal article
- Published by SAGE Publications in Journal of Near Infrared Spectroscopy
- Vol. 10 (1), 77-83
- https://doi.org/10.1255/jnirs.324
Abstract
Industries from agriculture to petrochemistry have found near infrared (NIR) spectroscopic analysis useful for quality control and quantitative analysis of materials and products. The general chemical, polymer chemistry, petrochemistry, agriculture, food and textile industries are currently using NIR spectroscopic methods for analysis. In this study, we developed a portable NIR instrument for the non-destructive testing of products in the field, which has resulted in an instrument for commercial sale and use. The instrument consists of a light source, a polychromator, a wave-guide (optical fibre bundle) and a data processing unit. We tested the performance of the portable NIR instrument in determining the sugar content of apples. The performance was also examined at full width at half maximum ( FWHM) of the spectrum. The difference in the absorption of quartz and plastic fibres in the NIR was also compared. The sugar content measurements were confirmed by a high correlation to the Brix value of the apples, and the calibration showed the accuracy of the instrument in practice. Application of this instrument to fruits and vegetables other than apples was explored.Keywords
This publication has 5 references indexed in Scilit:
- Classification of High Acid Fruits by Partial Least Squares Using the near Infrared Transmittance Spectra of Intact Satsuma MandarinsJournal of Near Infrared Spectroscopy, 1998
- Nondestructive Determination of Soluble Solids in Tomatoes using Near Infrared SpectroscopyJournal of Food Science, 1996
- Multichannel Fourier-transform infrared spectrometerApplied Optics, 1992
- Determination of Sugar Content in Intact Peaches by Near Infrared Spectroscopy with Fiber Optics in Interactance Mode.Journal of the Japanese Society for Horticultural Science, 1992
- Mechanically ruled aberration-corrected concave gratings for a flat-field grazing-incidence spectrographApplied Optics, 1983