IMPEDANCE SPECTROMETER FOR APPLICATION IN BIOLOGY AND FOOD QUALITY CONTROL

Ivan Krejci, Pavel Smetana, Marek Musil
Abstract:
The electrical impedance spectroscopy is widely used in material science, because this quantity and its frequency spectrum are important features of any material. This method became popular in measurement of biological and biochemical objects, including foods, especially in the specification of material ingredients and their concentration. This application requires quite different approach to the construction of impedance spectrometers, because they are usually designed for measurements in laboratory conditions, while many biological materials are investigated in situ or are processed under rough climatic conditions (low temperature, high air humidity, etc.). Besides, portability and measurement automation are the accented features of the instrument. To reach these requirements, the new impedance spectrometer has been built. Specific impedance measurement conditions of biological objects, the state of the art, the instrument construction, used measurement method and achieved results are discussed.
Keywords:
impedance spectrometer, signal processing, quadrature detection
Download:
IMEKO-WC-2015-TC23-450.pdf
DOI:
-
Event details
Event name:
XXI IMEKO World Congress
Title:

Measurement in Research and Industry

Place:
Prague, CZECH REPUBLIC
Time:
30 August 2015 - 04 September 2015
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