Simple and rapid determination of 3-monochloropropane-1,2-diol in food contact papers based on polydopamine-polyethyleneimine copolymerization

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL Talanta Pub Date : 2024-11-17 DOI:10.1016/j.talanta.2024.127228

Min Fang , Zhaojie Wang , Qing Fu , Qing Yang , Lin Xu , Yuepeng Lu , Yong Yang , Xiaoming Jiang , Yongning Wu , Zhiyong Gong , Xin Liu

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Abstract

The aim of this work was to develop a fluorescence method based on the polydopamine-polyethyleneimine (PDA-PEI) copolymerization, which was subsequently applied for the determination of 3-monochloropropane-1,2-diol (3-MCPD) in food contact papers (FCMs). PEI could provide an alkaline environment and then react with dopamine (DA) to produce copolymers by Michael addition and Schiff-base reactions. This copolymer has a strong fluorescence emission at 527 nm. We found that amino groups of DA and PEI could also react with 3-MCPD in an alkaline medium, which improved the morphology and fluorescence intensity of PDA-PEI copolymers. The fluorescence intensity of the polymers was linear but inversely proportional to the concentration of 3-MCPD in the range of 10.0–500.0 μg kg⁻¹ and the detection limit was 2 μg kg⁻¹. The standard addition method was used in FCMs to demonstrate the practical applicability and the spiked recoveries ranged from 99.8 to 110.3 %. Finally, the levels of 3-MCPD in different FCMs (n = 70) were determined by the proposed method. The detection frequencies ranged from 25 % to 100 % and both the highest detection frequency and levels were observed in kitchen papers. More than half of the samples did not comply with the limits recommended by the German Federal Institute for Risk Assessment, suggesting that 3-MCPD released from FCMs is a major route of human exposure.

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基于聚多巴胺-聚乙烯亚胺共聚法简单快速地测定食品接触纸中的 3-单氯丙烷-1,2-二醇

这项工作的目的是开发一种基于多巴胺-聚乙烯亚胺（PDA-PEI）共聚的荧光方法，随后将其应用于食品接触纸（FCM）中 3-单氯丙烷-1,2-二醇（3-MCPD）的检测。PEI 可以提供碱性环境，然后与多巴胺（DA）通过迈克尔加成和希夫碱反应生成共聚物。这种共聚物在 527 纳米波长处具有强烈的荧光发射。我们发现，DA 和 PEI 的氨基也能在碱性介质中与 3-MCPD 发生反应，从而改善 PDA-PEI 共聚物的形态和荧光强度。在 10.0-500.0 μg kg-1 的范围内，聚合物的荧光强度与 3-MCPD 的浓度呈线性反比，检测限为 2 μg kg-1。为了证明标准添加法的实际适用性，我们把它用于食品添加剂中，结果发现添加回收率在 99.8% 至 110.3% 之间。最后，拟议方法还测定了不同食品添加剂（n = 70）中氯丙二醇的含量。检测频率介乎 25% 至 100%，厨房用纸的检测频率最高，氯丙二醇含量也最高。半数以上的样本不符合德国联邦风险评估研究所建议的限值，这表明氯丙二醇从含氟聚合物中释放出来是人类接触氯丙二醇的主要途径。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.