Studies on the Extraction Rate of Oil from Fish Muscle

Part I. Estimation of diffusion coefficients and a general theory of extraction rate constants

Abstract

The extraction rate of oil from fish muscle was investigated. In order to generalize the extraction curves obtained from several sizes of fish muscle, the discussion was made by applying three dimentional Fick's law. D₁ is the diffusion coefficient at the direction parallel to fibre and D₂ and D₃ at the direction perpendicular to fibre. D₂ was assumed to be equal to D₃. The difference between D₁ and D₂ was found small. The generalized extraction curves obtained from experiments were agreed well with the theory except at 45°C and 60°C. The disagreement at higher temperature was probably caused by the changing points of extraction mechanism.