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Determination of Benzo[a]pyrene in Roast Meat by In Situ Growth of Covalent Organic Framework on Titanium Wire for Solid-Phase Microextraction Coupled with GC-FID
Food Analytical Methods ( IF 2.9 ) Pub Date : 2020-07-07 , DOI: 10.1007/s12161-020-01812-5
Yue-Hong Pang , Miao Sun , Xiao-Fang Shen , Qi Yue , Tian-Tian Ma , Cheng Yang

Benzo[a]pyrene (BaP) is a kind of trace pollutant commonly found in environment, food, and organism. It has been widely concerned because of its strong carcinogenicity to the human body. In this paper, covalent organic framework TpBD, in situ growth on titanium wire, was used as the coating of solid-phase microextraction (SPME) fiber and coupled with gas chromatography–flame ionization detector (GC-FID) for the detection of trace BaP in roast meat samples. The linear range of the developed method under the optimized experimental conditions was 0.02–15 μg L−1, the detection limit (S/N = 3) was 0.006 μg L−1, and the limit of quantification (S/N = 10) was 0.02 μg L−1. The intra-day and inter-day precision of a single fiber were 1.73% and 2.27%, respectively. The relative standard deviation (RSD) between fiber-to-fiber was investigated by three as-fabricated fibers was 6.09%. Moreover, the enrichment factor of the fabricated TpBD SPME fiber for BaP was 4914, and the fiber can withstand at least 150 cycles of adsorption and desorption without significantly decrease in extraction efficiency (< 3.6%). Finally, the developed method was successfully applied to the detection of BaP in roast meat samples with the recoveries from 95.4 to 108.5%.



中文翻译:

固相微萃取-GC-FID钛线上共价有机骨架原位生长法测定烤肉中的苯并[a] py

苯并[a] py(BaP)是一种常见于环境,食物和生物中的微量污染物。由于其对人体的强致癌性,已引起广泛关注。在本文中,共价有机骨架TpBD在钛丝上原位生长,被用作固相微萃取(SPME)纤维的涂层,并与气相色谱-火焰电离检测器(GC-FID)结合用于检测痕量BaP在烤肉样品中。优化的实验条件下所提出的方法的线性范围为0.02-15微克大号-1,检测极限(S / Ñ  = 3)为0.006微克大号-1,和定量限(S / Ñ  = 10)为0.02μgL -1。单根纤维的日内和日间精度分别为1.73%和2.27%。三根人造纤维研究了纤维之间的相对标准偏差(RSD)为6.09%。此外,所制备的TpBD SPME纤维对BaP的富集系数为4914,该纤维可经受至少150次吸附和解吸循环,而萃取效率不会显着降低(<3.6%)。最终,该方法成功应用于烤肉样品中BaP的检测,回收率从95.4%提高到108.5%。

更新日期:2020-07-07
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