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Evaluation of Phthalic Acid Esters in Fish Samples Using Gas Chromatography Tandem Mass Spectrometry with Simplified QuEChERS Technique

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Abstract

Phthalic acid esters (PAEs) have become an important food safety concern due to their lipophilic properties and propensity to accumulate in adipose tissue in edible fish. In this study, a simple, sensitive, and accurate analytical method was successfully established for simultaneous determination of 19 PAEs in fish samples using gas chromatography coupled with tandem mass spectrometry (GC–MS/MS). A simplified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) procedure was applied for sample preparation, and the Plackett-Burman factorial design was utilized for optimizing extraction parameters. The calibration curves were linear in the range 0.01–0.5 mg/kg for all of the analyzed PAEs, and the limits of quantification (LOQs) were 0.05–20 μg/kg which are much lower than those in previous reports. The average spiked recoveries ranged from 71.2 to 116.3%, with relative standard deviations (RSDs) of 3.9 to 16.2% (n = 6). Finally, the method was applied to analyze 60 real fish samples taken from Shanghai Municipality, China, and the diisobutyl phthalate (DIBP), dibutyl phthalate (DBP), and bis(2-ethoxyethyl)phthalate (DEHP) were found in almost all fish samples tested in this study. The present study demonstrated that the established method was suitable for market surveillance of 19 PAE residues in fish samples.

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Acknowledgments

This study was supported by the National Key Research and Development Program of China (2017YFC1600705), National Natural Science Foundation of China (31701519), and the Central Public-interest Scientific Institution Basal Research Fund (1610072017004).

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Correspondence to Yongzhong Qian.

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Yanyang Xu, Rui Weng, Yushun Lu, Xinlu Wang, Dan Zhang, Yun Li, Jing Qiu, and Yongzhong Qian declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Informed consent is not applicable in this study.

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Xu, Y., Weng, R., Lu, Y. et al. Evaluation of Phthalic Acid Esters in Fish Samples Using Gas Chromatography Tandem Mass Spectrometry with Simplified QuEChERS Technique. Food Anal. Methods 11, 3293–3303 (2018). https://doi.org/10.1007/s12161-018-1313-z

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  • DOI: https://doi.org/10.1007/s12161-018-1313-z

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