Thursday, May 10, 2012

AOCS/JOCS Release First Validated Direct Method for Glycidyl Fatty Acid Esters

AOCS and the Japan Oil Chemists’ Society (JOCS) released the first validated direct method for glycidyl fatty acid esters in edible oils, AOCS/JOCS Official Method Cd 28-10. The method marks the first analytical collaboration between the two organizations.

AOCS/JOCS Official Method Cd 28-10 determines glycidyl fatty acid esters in edible oils using double solid-phase extraction and liquid chromatography-mass spectrometry. It is applicable for the determination of glycidyl fatty acid esters in commercial vegetable oils and fats.

AOCS/JOCS Official Method Cd 28-10 was developed through the Expert Panel on Process Contaminants that AOCS established in December 2009. Process contaminants are a group of unrelated compounds formed in the production of finished food products. The panel is initially focusing on the direct measurement of two process contaminants – 3-monochloropropane-1,2-diol (3-MCPD) esters and glycidyl (glycidol) esters. Glycidyl esters have been found in some oils, causing their temporary removal in certain markets. Of particular interest is the occurrence of variable levels of 3-MCPD esters in refined vegetable oils. Discrepancies among different measurement techniques for 3-MCPD esters are ascribed to the presence of the potential precursor, glycidyl (glycidol) esters. The exact relationship, if any, between these two groups of compounds is unclear.

The method was tested through two pre-studies and a full collaborative study that consisted of nine blind-duplicate samples and included participation from laboratories in Canada, China, France, Germany, Japan, Malaysia, United Kingdom, and the United States. The results were statistically analyzed according to the AOAC-IUPAC Harmonized Protocol (AOCS M 1-92 and M 4-86).

For more information on this method, please contact AOCS Technical Director Richard Cantrill at or +1 217-693-4830. AOCS Methods are world-renowned, used in hundreds of laboratories on six continents. The Official Methods and Recommended Practices of the AOCS, 6th Edition, 2nd Printing, contains over 400 fats, oils, and lipid-related methods critical for processing and trading.
About AOCS (American Oil Chemists’ Society)
AOCS is a global professional scientific society for all individuals and corporations with interest in the fats, oils, surfactants, detergents, and related materials fields. For more than 100 years, AOCS has promoted the science and technology of lipids in the fats and oils industries through analytical methods, proficiency testing, peer-reviewed technical publishing, and by providing venues for technical discussions and educational opportunities. Today, AOCS is a global partner in the science and technology industry with over 4,500 members throughout 90 countries.

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