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Measurement of the diffusion coefficient of free fatty acid in groundnut oil by the capillary‐cell method
Author(s) -
Smits G.
Publication year - 1976
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02586347
Subject(s) - stearic acid , oleic acid , capillary action , diffusion , chemistry , mathematics , solvent , chromatography , analytical chemistry (journal) , materials science , thermodynamics , organic chemistry , biochemistry , physics , composite material
A capillary‐cell method has been used for measuring the diffusion coefficients of oleic and stearic acids in groundnut oil at 130 C. The method demands careful fulfillment of the boundary conditions and, therefore, special attention has been paid to the establishment of the appropriate experimental conditions. Despite the suggestions of previous workers, a lot of effort is required to approximate the ideal conditions adequately. The experimental conditions proved to be optimal when capillaries with an inner diameter of 0.8 mm and a length of 20 mm were placed in a stationary solvent bath. The diffusion coefficients of oleic and stearic acid are (4.2±0.16)10 −10 and (3.7±0.23)10 −10 m 2 /s, respectively, at a confidence interval of 95%.