Simultaneous determination of 3-monochloropropane-1,2-diol and acrylamide in food by gas chromatography-triple quadrupole mass spectrometry with coupled column separation |
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Authors: | Xiao-min Xu Hua-li He Yan Zhu Liang Feng Ying Ying Bai-fen Huang Hai-tao Shen Jian-long Han Yi-ping Ren |
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Institution: | 1. Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China;2. Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, China;3. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China |
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Abstract: | Both 3-monochloropropane-1,2-diol (3-MCPD) and acrylamide are contaminants found in heat-processed foods and their related products. A quantitative method was developed for the simultaneous determination of both contaminants in food by gas chromatography-triple quadrupole mass spectrometry (GC–MS/MS). The analytes were purified and extracted by the matrix solid-phase dispersion extraction (MSPDE) technique with Extrelut NT. A coupled column (a 3 m Innowax combined with a 30 m DB-5 ms) was developed to separate both compounds efficiently without derivatization. Triple quadrupole mass spectrometry in multiple reaction monitoring mode (MRM) was applied to suppress matrix interference and obtain good sensitivity in the determination of both analytes. The limit of detection (LOD) in the sample matrix was 5 μg kg−1 for 3-MCPD or acrylamide. The average recoveries for 3-MCPD and acrylamide in different food matrices were 90.5–107% and 81.9–95.7%, respectively, with the intraday relative standard deviations (RSDs) of 5.6–13.5% and 5.3–13.4%, respectively. The interday RSDs were 6.1–12.6% for 3-MCPD and were 5.0–12.8% for acrylamide. Both contaminants were found in samples of bread, fried chips, fried instant noodles, soy sauce, and instant noodle flavoring. Neither 3-MCPD nor acrylamide was detected in the samples of dairy products (solid or liquid samples) and non-fried instant noodles. |
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Keywords: | 3-Monochloropropane-1 2-diol (3-MCPD) Acrylamide Heat-processed foods Flavoring Gas chromatography-triple quadrupole mass spectrometry (GC&ndash MS/MS) Coupled column |
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