Occurrence of cyclic fatty acid monomers in frying oils used for fast foods

Cyclic fatty acid monomers were analyzed by gas chromatography in commercial frying oils, obtained in this country and in the Middle East. Samples were obtained from food outlets in California and Illinois after varying periods of usage. The samples from Egypt and Israel were collected from street vendors frying vegetable patties (known as “fallafel”) in open-air stands. The United States samples ranged from 0.1 to 0.5% cyclic monomers, and from 1 to 8% polar +noneluted thermal oxidation materials. The Middle Eastern samples showed significantly more heat abuse, with values for cyclic monomers from 0.2 to 0.7% and polar materials ranging from 2 to 22%.

[1]  E. G. Perkins,et al.  Analysis of thermally abused soybean oils for cyclic monomers , 1981 .

[2]  A. Sagredos.  Bestimmung von cyclischen Fettsäuren über eine Harnstoffsäule , 1967 .

[3]  G. Billek.  II. DGF‐Symposium über Brat‐ und Siedefette , 1979 .

[4]  O. C. Johnson,et al.  The relationship of pyridoxine and riboflavin to the nutritional value of polymerized fats , 1957 .

[5]  P. Swoboda,et al.  Deterioration of sunflower seed oil under simulated frying conditions and during small‐scale frying of potato chips , 1982 .

[6]  C. Fritsch,et al.  Changes in dielectric constant as a measure of frying oil deterioration , 1979 .

[7]  N. Artman.  The chemical and biological properties of heated and oxidized fats. , 1969, Advances in lipid research.

[8]  T. Kawada,et al.  Chemical reactions involved in the deep fat frying of foods. I. A laboratory apparatus for frying under simulated restaurant conditions , 1965, Journal of the American Oil Chemists' Society.

[9]  W. Nawar,et al.  Evaluation of New Methods for the Assessment of Used Frying Oils , 1981 .

[10]  M. Peled,et al.  Effect of water and bht on stability of cottonseed oil during frying , 1975 .

[11]  M. Sahasrabudhe,et al.  A method for the determination of the extent of polymerization in frying fats and in fats extracted from fried foods , 1963 .

[12]  R. Rohde.  Spectrophotometric Determination of Copper in Lead, Tin, Aluminum, Zinc, and Their Alloys with Biscyclohexanone Oxalyldihydrazone. , 1966 .

[13]  Y. Ishikawa,et al.  Tocopherol contents of nine vegetable frying oils, and their changes under simulated deep-fat frying conditions , 1976, Journal of the American Oil Chemists' Society.

[14]  E. E. Rice,et al.  The nutritional value of fats after use in commercial deepfat frying. , 1960, Journal of NutriLife.

[15]  E. G. Perkins,et al.  Heated fats. IV. Chemical changes in fats subjected to deep fat frying processes: Cottonseed oil , 1965, Journal of the American Oil Chemists' Society.

[16]  Stephen S. Chang,et al.  A limited survey of fats and oils commercially used for deep fat frying. , 1967 .

[17]  G. Billek,et al.  Quality assessment of used frying fats: A comparison of four methods , 1978 .

[18]  R. Taubold,et al.  Gel permeation chromatography of heated fats , 1973 .

[19]  L. D. Metcalfe,et al.  Rapid Preparation of Fatty Acid Esters from Lipids for Gas Chromatographic Analysis. , 1966 .

[20]  H. Pardun,et al.  Veränderungen der Fette unter Fritierbedingungen und deren analytische Erfassung Beurteilung des Gebrauchswertes und Analytik von Fritierfetten II , 1974 .

[21]  A. Waltking,et al.  Chemical analysis of polymerization products in abused fats and oils , 1975, Journal of the American Oil Chemists' Society.