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KMID : 1024420190230010007
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Food Engineering Progress
2019 Volume.23 No. 1 p.7 ~ p.15
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Effect of Hypotonic and Hypertonic Solution on Brining Process for Pork Loin Cube: Mass Transfer Kinetics
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Park MIn
Lee Nak-Hun
In Ye-Won
Oh Sang-Yup
Cho Hyung-Yong
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Abstract
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The impregnation of solid foods into the surrounding hypotonic or hypertonic solution was explored as a method to infuse NaCl in pork loin cube without altering its matrix. Mass transfer kinetics using a diffusive model as the mathematical model for moisture gain/loss and salt gain and the resulting textural properties were studied for the surrounding solutions of NaCl 2.5, 5.0, 10.0 and 15% (w/w). It was possible to access the effects of brine concentration on the direction of the resulting water flow, quantify water and salt transfer, and confirm tenderization effect by salt infusion. For brine concentrations up to 10% it was verified that meat samples gained water, while for processes with 15% concentration, pork loin cubes lost water. The effective diffusion coefficients of salt ranged from 2.43×10-9 to 3.53×10-9 m2/s, while for the values of water ranged from 1.22×10-9 to 1.88×10-9 m2/s. The diffusive model was able to represent well salt gain rates using a single parameter, i.e. an effective diffusion coefficient of salt through the meat. However, it was not possible to find a characteristic effective diffusion coefficient for water transfer. Within the range of experimental conditions studied, salt-impregnated samples by 5% (w/w) brine were shown with minimum hardness, chewiness and shear force.
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KEYWORD
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pork meat, impregnation, mass transfer, tenderizing, hydration-dehydration
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