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Proceedings Paper

Laser instrumentation for express diagnostics of impurities and toxins in liquid food
Author(s): Tatiana Yu. Moguilnaia; Elena A. Saguitova; Kiril A. Prokhorov; E. I. Grebenuk; N. A. Grebenuk
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Paper Abstract

We present a new device called <> for monitoring milk parameters and discuss some possibilities of its modification for express-diagnostics of man-caused contamination. At present, the developed laser device <> is capable of precisely measuring the concentration of fats, proteins, and water in milk. The operation of the device is based on comparing the intensities of elastic scauering radiation from three semiconductor lasers with different wavelengths in the near-infrared range. It takes only about 30 seconds to complete a single measurement. Now we are developing a method for express-diagnostics of man-caused toxins (antibiotics, metal salts, etc.) in milk by studying non-elastic scattering and luminescence induced by visible-range laser radiation. The non-elastic scattering radiation in milk contaminated with a salt of lead is studied. It is observed that the radiation intensity decreases with an increase in the impurity concentration. We suppose that this is due to luminescence quenching caused by the impurity presence We have found out that the scattered light intensity exponentially changes with the concentration of the metal. The sensitivity in changing light intensity especially high at low concentrations of impurities. We suppose that these results can be used for express-diagnostics of toxins in milk by the proposed laser device <>.

Paper Details

Date Published: 13 March 2001
PDF: 10 pages
Proc. SPIE 4206, Photonic Detection and Intervention Technologies for Safe Food, (13 March 2001); doi: 10.1117/12.418736
Show Author Affiliations
Tatiana Yu. Moguilnaia, Russian State Technological Univ. (Russia)
Elena A. Saguitova, Institute of General Physics (Russia)
Kiril A. Prokhorov, Institute of General Physics (Russia)
E. I. Grebenuk, Russian State Technological Univ. (Russia)
N. A. Grebenuk, Russian State Technological Univ. (Russia)

Published in SPIE Proceedings Vol. 4206:
Photonic Detection and Intervention Technologies for Safe Food
Yud-Ren Chen; Shu-I Tu, Editor(s)

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