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A spectrophotometric method for the evaluation of vegetable oil colors
Author(s) -
Pohle W. D.,
Tierney S. E.
Publication year - 1957
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/bf02638071
Subject(s) - color measurement , optical density , edible oil , value (mathematics) , adaptation (eye) , biological system , mathematics , computer science , environmental science , remote sensing , optics , pulp and paper industry , artificial intelligence , materials science , computer vision , chemistry , statistics , engineering , physics , geology , food science , biology
Summary A means for evaluating oil color on the basis of an optical density measurement at 500 millimicrons has been proposed. The amount of chlorophyll would be taken into account by present methods or an adaptation of these methods. The advantages of the proposed means of evaluating oil color are that it expresses more exactly the amount of color in the oil, provides a more accurate estimate of color removal during bleaching, and makes possible more exact evaluation of bleaching earth. Data have been presented on the color value (Optical Density × 100) of refined and bleached oils, possible variation in value obtained from different laboratories, estimation of color removed during bleaching, evaluation of bleaching earth, and relationship between color of refined and bleached oils prepared in the laboratory by the Official Method.