Differencing sea bass (Dicentrarchus labrax) fillets frozen in different conditions by impedance measurements (CROSBI ID 187171)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Vidaček, Sanja ; Janči, Tibor ; Brdek, Zdenka ; Udovičić, Doris ; Marušić, Nives ; Medić, Helga ; Petrak, Tomislav ; Lacković, Igor
engleski
Differencing sea bass (Dicentrarchus labrax) fillets frozen in different conditions by impedance measurements
The potential of electrical impedance was investigated to differentiate thawed sea bass fillets (Dicentrarchus labrax) previously subjected to different freezing conditions. The HP 4284A Precise LCR meter was used to measure impedance magnitude (|Z|) and phase (u) at 27 frequencies from 0.1 to 1000 kHz. A needle-type multi electrode array was tested as a probe for impedance measurements. The study showed that fast and non-invasive control method based on measurement of u on thawed fillets could assess the freezing conditions of white fish at higher frequencies of measurements (500–1000 kHz). The advantages of u when compared with |Z| include its independence on temperature, on puncture depth of the probe and on duration of storage prior to freezing. Usage of a needle-type multi electrode array reduced the effect of muscle tissue anisotropy ; however, even at 1 MHz, the differences in electrical measurements varied around 10–11% depending on muscle fibre direction
electrical impedance; frozen fish; phase; quality
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Podaci o izdanju
47 (8)
2012.
1757-1764
objavljeno
0950-5423
10.1111/j.1365-2621.2012.03031.x
Povezanost rada
Elektrotehnika, Prehrambena tehnologija