"JOURNAL OF RADIO ELECTRONICS"  N 1, 2015

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HIGH PRECISE THZ SPECTROSCOPY FOR FOOD QUALITY ANALYSIS

 

V. A. Anfertev 1, A. F. Bashmakov 2, V. L. Vaks 1,2, E. G. Domracheva 1,2, E. A. Sobakinskaya 1,2, G. A. Soegova 1, M. B. Chernyaeva 1,2

1 Lobachevsky State University of Nizhny Novgorod

2 Institute for Physics of Microstructures of RAS

 

The paper is received on January 13, 2015

 

Abstract: Nowadays the problem of food quality control is of great importance. Thereby the development of fast non-invasive analytical methods, allowing the quantitative determination of volatile chemical compounds, that could be sign of food freshness or pathology, is needed. In this report the possibility of applying the high resolution THz spectroscopy for food quality control has been considered. The results reveal that odor of fresh meat contains ethil formate, diethyl ether, alanine and glycine, that disappear during natural decomposition process. The latter is characterized by uprise of sulfur compound such as hydrogen sulfide and sulfur dioxide. After that the decaying process is going on with ammonia and nitrogenous organic substances appearance (formamide, ethylamine).In the spoiled fish odor propylene glycol, urethane, hydrogen sulfide, sulfur dioxide and nitriles substances have been found. The high resolution THz spectroscopy as “electronic nose” has been demonstrated to be very promising for food quality analyzing.

Key words: terahertz frequency range, high precise non-stationary spectroscopy, analysis of food quality, "e-nose", gas-marker.