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United States Department of Agriculture

Agricultural Research Service

Title: New Sensors for Quality Analysis

Author
item Barton Ii, Franklin

Submitted to: US Japan Nutritional Research Panel
Publication Type: Abstract Only
Publication Acceptance Date: December 1, 2002
Publication Date: December 1, 2002
Citation: BARTON II, F.E. NEW SENSORS FOR QUALITY ANALYSIS. THE 31ST UNITED STATES JAPAN NUTRITIONAL RESEARCH PANEL. 2002. ABSTRACT P. 29-30.

Interpretive Summary: An interpretive summary is not required. This is an abstract only.

Technical Abstract: Historically, Near Infrared (NIR) spectroscopy of agricultural commodities and foods has been accomplished with filter instruments, dispersive monochrometers and diode array spectrometers. These instruments have been characterized as rugged, high signal-to-noise (S/N) and inexpensive, monochrometers excluded. In the past few years Fourier Transform Interferometers have become available from the traditional mid infrared (MIR) manufacturers, such Perkin-Elmer, Nicolet and Bruker. These instruments are characterized by high resolution, lower S/N, not particularly rugged and relatively high cost, comparable to monochrometers. Results will be shown which describe models developed by these new instruments and what advantages they provide to the agricultural analytical analysis community. The models of the non-FT instruments have been previously described at UJNR meetings and are comparable. For the vast majority of agricultural analyses resolution is not nearly as important as high S/N. The other advantages of the FT instruments are speed and "multi-plexing", i.e., acquiring data at more than one place with the same instrument. Finally, a new sensor named DASI, diode array scanning interferometer will be discussed for its potential as a rugged inexpensive analysis system.

Last Modified: 7/30/2014
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