Journal of the American Oil Chemists' Society

, Volume 88, Issue 1, pp 15–21 | Cite as

Generalized Method to Quantify Glycidol Fatty Acid Esters in Edible Oils

  • Yoshinori Masukawa
  • Hiroki Shiro
  • Naoki Kondo
  • Naoto Kudo
Original Paper

Abstract

We previously reported a method to quantify five species of glycidol fatty acid esters (GEs) in edible oils which used a combination of a double solid-phase extraction (SPE) and liquid chromatography-mass spectrometry (LC-MS) using fast HPLC. To expand its application, we established a new method using conventional HPLC, which is applicable not only to liquid oils but also to solid ones. The optimized LC-MS conditions using conventional HPLC were useful for standard GEs but not for oil samples because of the insufficient accuracy during sequential runs. Thin-layer chromatographic studies revealed that co-existing diacylglycerols were not sufficiently removed by the original SPE procedure due to excessive amounts of oil applied to the normal-phase SPE, which disturbed the quantitative and stable detection only when conventional HPLC was employed. The amount of oil applied was decreased tenfold (100 mg → 10 mg), which resulted in stable LC-MS measurements. Furthermore, the use of chloroform/acetone, instead of acetonitrile, prior to the SPE treatment expanded its applicability to solid oils, with recovery values ranging from 102.7 to 109.5% for three oil samples (two liquid and one solid oils). This method can form the basis of a standardized method for the quality control of GEs in edible oils.

Keywords

Glycidol fatty acid ester Quantification LC-MS TLC Solid edible oil 

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Copyright information

© AOCS 2010

Authors and Affiliations

  • Yoshinori Masukawa
    • 1
  • Hiroki Shiro
    • 1
  • Naoki Kondo
    • 1
  • Naoto Kudo
    • 2
  1. 1.Tochigi Research Laboratories, Kao CorporationHaga-gunJapan
  2. 2.Tokyo Research Laboratories, Kao CorporationTokyoJapan

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