Structure oil-absorption relationships during deep-fat frying

Bouchon, P., Aguilera, J.M. and Pyle, D.L. (2003) Structure oil-absorption relationships during deep-fat frying. Journal of Food Science, 68 (9). pp. 2711-2716. ISSN 0022-1147 doi: 10.1111/j.1365-2621.2003.tb05793.x

Abstract/Summary

Analysis of the oil-absorption process in deep-fat fried potato cylinders (frying temperatures of 155degreesC, 170degreesC, and 185degreesC) allowed to distinguish 3 oil fractions: structural oil (absorbed during frying), penetrated surface oil (suctioned during cooling), and surface oil. Results showed that a small amount of oil penetrates during frying because most of the oil was picked up at the end of the process, suggesting that oil uptake and water removal are not synchronous phenomena. After cooling, oil was located either on the surface of the chip or suctioned into the porous crust microstructure, with an inverse relationship between them for increasing frying times.