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Determination of methacrylic acid in food simulants by pyrolytic butylation-gas chromatography

文献类型： 外文期刊

作者： Huang, Zhongping 1 ; Qiu, Ruofeng 1 ; Liu, Tingfei 1 ; Huang, Yilei 1 ; Zhu, Zuoyi 3 ; Wang, Lili 1 ;

作者机构： 1.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China

2.Taizhou Entry Exit Inspect & Quarantine Bur, Taizhou 318000, Zhejiang, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Qual & Stand Agr Prod, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Pyrolytic butylation;Methacrylic acid;Food packaging;Migration;Gas chromatography

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

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收录情况： SCI

摘要： An on-line pyrolytic butylation approach was proposed to determine methacrylic acid (MA) in food simulants by gas chromatography (GC) without an expensive pyrolyzer. MA in food simulants was converted into butyl methacrylate in the presence of tetrabutylammonium hydroxide (TBAH) without any pretreatment at 330 inverted perpendicular C in the injection-port, contributing to high GC signal response. The derivatizing conditions for the proposed method were optimized, namely the injection-port temperature, type and amount of the organic alkaline used for derivatization. A series of standard solutions of MA in the range of 1.0-50 mg/kg were analyzed with correlation coefficient r >= 0.9975. The limits of detection (LODs) were less than 0.15 mg/kg for MA in four matrix simulants (distilled water, 3% w/v acetic acid, 10% v/v ethanol, and isooctane). Relative standard deviations (RSDs) for retention time, peak height and peak area were all less than 3.88%. The technique was successfully applied to the analysis of MA migrating from plastic cup samples, with recoveries of added MA in the range of 96.5-123.0%. Direct injection of the simulants into the GC system after migration tests, without any pretreatment step, makes the developed method of great value for rapid screening analysis of samples in bulks. (C) 2016 Elsevier B.V. All rights reserved.

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