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Collaborative Study for the Analysis of Glycidyl Fatty Acid Esters in Edible Oils using LC–MS

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Journal of the American Oil Chemists' Society

Abstract

An interlaboratory study was conducted to evaluate a method for determining glycidyl fatty acid esters (GE) in edible oils. Samples were dissolved in tert-butyl methyl ether/ethyl acetate and subjected to two solid-phase extraction (SPE) steps. The first SPE step utilized methanol elution from a C18 cartridge, and the second SPE step utilized n-hexane/ethyl acetate elution from a silica cartridge. The final extract was analyzed using liquid chromatography with a single quadrupole mass spectrometer in selected ion monitoring (SIM) mode. Quantification was performed using external standardization. Eighteen samples (9 oils × 2 blind duplicates) were assayed for glycidyl palmitate, glycidyl stearate, glycidyl oleate, glycidyl linoleate and glycidyl linolenate by 17 collaborating laboratories from seven countries. Sample matrices included palm, olive, corn, soybean and rapeseed oils. Repeatability (RSDr) ranged from 6.85 to 19.88 % and reproducibility (RSDR) ranged from 16.58 to 35.52 % for samples containing greater than 0.5 mg/kg of individual GE. HORRATR values ranged from 0.62 to 14.70 for determination of total GE. The method provides acceptable results for quantification of GE in edible oils.

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Authors and Affiliations

  1. Research Division, Archer Daniels Midland Company, James R. Randall Research Center, 1001 N. Brush College Road, Decatur, IL, 62521, USA

    Michael R. Blumhorst & Mark W. Collison

  2. AOCS, PO Box 17190, Urbana, IL, 61803-7190, USA

    Richard Cantrill

  3. Tochigi Research Laboratories, Kao Corporation, 2606 Akabane, Ichikai-machi, Haga-gun, Tochigi, 321-3497, Japan

    Hiroki Shiro

  4. Tokyo Research Laboratories, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo, 131-8501, Japan

    Yoshinori Masukawa, Shigeru Kawai & Koichi Yasunaga

Authors
  1. Michael R. Blumhorst
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  2. Mark W. Collison
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  3. Richard Cantrill
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  4. Hiroki Shiro
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  5. Yoshinori Masukawa
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  6. Shigeru Kawai
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  7. Koichi Yasunaga
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Corresponding author

Correspondence to Koichi Yasunaga.

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Blumhorst, M.R., Collison, M.W., Cantrill, R. et al. Collaborative Study for the Analysis of Glycidyl Fatty Acid Esters in Edible Oils using LC–MS. J Am Oil Chem Soc 90, 493–500 (2013). https://doi.org/10.1007/s11746-012-2187-7

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  • DOI: https://doi.org/10.1007/s11746-012-2187-7

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