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Evaluation of cold‐test methods for screening cloudy canola oils
Author(s) -
Botha Ingrid,
Mailer Rodney J.
Publication year - 2001
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/s11746-001-0274-3
Subject(s) - canola , acetone , environmental science , chemistry , pulp and paper industry , food science , engineering , organic chemistry
Cloudiness in canola ( Brassica napus ) oil is currently tested using methods that involve cooling the oil samples and observing them for the development of cloudiness. Alternative methods include the use of solvents to increase sensitivity or speed. We compared traditional temperature‐only cold tests and solvent cold tests for canola oils which sediment at room temperature, only while refrigerated, or not at all. All oils tested passed the American Oil Chemists’ Society cold test, and all but one heavily sedimenting oil passed a commercial refiner's cold test. The efficiency of the commercial refiner's test was improved by lowering the temperature from 15 to 7°C. Of the four solvents tested, acetone was the most effective in detecting cloudy oils. The most effective combination was a cold test using 70% cold acetone, observed after 6 h storage in an ice‐water bath.