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| Determination of chloropropanediol esters and glycidyl ester in edible oils by 13C isotope- alkaline hydrolysis- GC-MS coupled with a fully automatic pretreatment platform |
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Received:April 06, 2025 Revised:March 17, 2026 Accepted:May 21, 2025
Published：July 20, 2026
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| DOI：10.19902/j.cnki.zgyz.1003-7969.250172 |
| KeyWord:isotope method chloropropanediol esters glycidyl ester alkaline hydrolysis method |
| FundProject: |
| Author Name | Affiliation | | XU Aijun1, WANG Niannian2, CHEN Jiayi3, QIAN Meixia3, LIANG Wei1, ZHANG Hong1 | 1.Shanghai Esensing Analytical Technology Co. , Ltd. , Shanghai 200233, China
2.Jiangsu Goldland Grain,
Oil and Foodstuff Co. , Ltd. , Nantong 226602, Jiangsu, China
3.Bunge (Nanjing) Grain and
Oil Co. , Ltd. , Nanjing 210046, China |
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| Abstract: |
| To meet the practical demands of small and medium-sized edible oil processing plants, a method was established for the simultaneous determination of 3-monochloropropanediol ester (3-MCPDE), 2-monochloropropanediol ester (2-MCPDE), and glycidyl ester (GE) in edible oils using 13C isotope-alkaline hydrolysis-gas chromatography-mass spectrometry (GC-MS). A fully automatic pretreatment platform was used to prepare the samples according to the alkaline hydrolysis method described in Method 1 of Part 2 of GB 5009.191-2024, then was detected by GC-MS, and quantification was performed using the internal standard method. The results showed that for 3-MCPDE, 2-MCPDE, and GE, the method exhibited good linearity (R2 > 0.997) in the range of 0.2-2 mg/kg, with a limit of quantification of 0.2 mg/kg and a limit of detection of 0.06 mg/kg. At spiked levels of 02, 1.0 mg/kg, and 1.6 mg/kg, the average recovery rates for the three contaminants ranged from 900% to 1045%. In six replicate experiments, the coefficient of variation for the determination of the three contaminants using the established method ranged from 3.01% to 4.15%, indicating good reproducibility. The established method was accurate and reliable, with no significant difference in results compared to those obtained using Method 1 of Part 2 of GB 5009.191-2024. In conclusion, the established method is suitable for the simultaneous determination of 3-MCPDE, 2-MCPDE and GE in edible oils. |
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