Differencing sea bass fillets frozen in different conditions by impedance measurements. (CROSBI ID 570037)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Vidaček, Sanja ; Medić, Helga ; Marušić, Nives ; Udovičić, Doris ; Petrak, Tomislav ; Lacković, Igor
engleski
Differencing sea bass fillets frozen in different conditions by impedance measurements.
The work is addressing the problem of varying quality of frozen fish fillets on the market today. Recently, impedance measurements have shown a potential to differentiate between frozen-thawed and fresh fish and among thawed fish fillets previously frozen under different conditions. However, measurements sometimes pose problems due to the sample properties (muscle anisotropy) and as a result of the measurement setup. In this study, sea bass fillets were frozen at -20 ºC, stored for 1 or 4 months with constant or fluctuated temperature during storage, and thawed overnight at +6 ºC. The impedance properties (resistance and reactance), protein solubility, pH, water holding capacity and lipid oxidation of the fillets were measured. The electronic device HP LCR-Meter-4284A operated on 19 frequencies from 1 Hz to 1 MHz, measuring the resistance and reactance by the constant current method. A needle-type multi-electrode array was used to reduce the effect of the muscle anisotropy. Prior to the measurement ‘open’ and ‘short’ corrections were made to compensate for the parasitic capacitance, inductance and series resistance of the probe and the connecting wires. Impedance measurements and especially reactance showed the potential of detecting the differences among the fillets frozen under different conditions. The measured difference in reactance of the fillets was most likely caused by the protein denaturation. The study showed the possible use of the impedance measurements in a quality control of frozen fish
impedance; fish; sea bass; frozen storage
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Podaci o prilogu
22-22.
2010.
objavljeno
Podaci o matičnoj publikaciji
WEFTA 2010 Seafood: Getting most, serving best... Proceedings book
Cakli, Sukran ; Celik, Ufuk ; Altinelataman, Can
Izmir:
978-605-88386-1-1
Podaci o skupu
40th Wefta Annual Meeting
predavanje
04.10.2010-07.10.2010
İzmir, Turska