Cooperative hydrogen- and halogen-bonding interaction promoted deep eutectic solvent-functionalized magnetic metal-organic framework for perfluoroalkyl iodides detection in edible oils

• Published in: Food control 2023-06, Vol.148, p.109625, Article 109625
• Main Authors: Han, Yingyi, Fan, Chen, Yin, Yaqi, Shan, Yuwei, Cao, Xueli
• Format: Article
• Language: English
• Subjects: Deep eutectic solvent; Edible oil; Magnetic metal-organic framework; Magnetic solid-phase extraction; Perfluoroalkyl iodides
• ISSN: 0956-7135; 1873-7129
• DOI: 10.1016/j.foodcont.2023.109625

In this study, a new deep eutectic solvent (DES)-functionalized magnetic metal-organic framework (MOF) was synthesized and used as an adsorbent for the detection of perfluoroalkyl iodides (PFAIs) in edible oils. A sensitive method was developed using UiO-66-NH2@DES-based magnetic solid-phase extraction combined with gas chromatography-mass spectrometry (MSPE-GC-MS). Important parameters, including different adsorbents, methanol extraction times, adsorbent amounts, and magnetic solid-phase extraction time, were systematically investigated to achieve the best extraction efficiency. Under optimized conditions, the proposed method showed high sensitivity with satisfactory methodology recovery (relative standard deviation ranged from 3.00 to 19.4%) and a limit of detection of 2.81–34.3 pg g−1. The method was successfully used for analyzing PFAIs in different edible oils, and the targets were detected in several samples in the concentration range of 212.9–3053 pg g−1. The halogen and hydrogen bonds presented a synergistic mechanism clarified via quantum-chemistry calculations, which is beneficial to the enrichment of PFAIs. This study demonstrates the first example of designing function-oriented DES-based materials for trace food contaminant analysis. [Display omitted] •A new DES-based MOF was designed for extraction of perfluoroalkyl iodides (PFAIs).•Analytical method was developed via UiO-66-NH2@DES enrichment and GC-MS detection.•The synergism of halogen and hydrogen bond is beneficial to the extraction of PFAIs.•The method had short extraction time, high sensitivity and recovery.