Identification of 19 phthalic acid esters in dairy products by gas chromatography with mass spectrometry |
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| Authors: | Pinggu Wu Dajin Yang Liyuan Wang Yan Zhou Xianghong Shen Bingjie Ma Jun Tang |
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| Affiliation: | 1. Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China;2. The National Center for Food Safety Risk Assessment, Beijing, China |
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| Abstract: | A detection method for 19 kinds of phthalic acid ester compounds analyzed by n‐hexane/ether/acetonitrile 1:7:8 v/v/v mixed solvent extraction, quick, easy, cheap, effective, rugged, and safe purification and internal standard method of quantitative gas chromatography with mass spectrometry was established. This method can effectively remove interfering materials, such as lipids, fatty acids, and pigments, from dairy products. The 19 kinds of phthalic acid ester compounds were within a 0.025–0.2 mg/kg range, the recovery rate was 65.2–125.7%, relative standard deviation was 7.9–15.4% (n = 6), and the limit of detection was 0.005–0.02 mg/kg. Concentrations of the 19 kinds of phthalic acid ester compounds ranged between 0.01 and 0.12 mg/kg in ten dairy materials and 20 dairy products. The established method is simple, rapid, accurate, and highly sensitive. |
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| Keywords: | Dairy products Gas chromatography Mass spectrometry Phthalate esters |
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