Hayat Muhammad, Raza Nadeem, Manzoor Suryyia, Irshad Yasmeen, Javaid Ramika, Waqar Rajput Abdul, Algethami Faisal K
Institute of Chemical Sciences, Bahauddin Zakariya University Multan Pakistan
Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU) Riyadh Kingdom of Saudi Arabia
RSC Adv. 2025 Jun 23;15(26):21037-21050. doi: 10.1039/d5ra02053k. eCollection 2025 Jun 16.
Imidacloprid (IMI) is increasingly prevalent in different environmental segments and has emerged as a possible threat to the ecosystem and human health. Therefore, a sustainable, effective, and eco-friendly approach is necessary for IMI detection. This study reports a new Cr-MOF/polymer composite for the detection of IMI in fish using the dispersive solid-phase microextraction method. This Cr-MOF/polymer composite was synthesized by combining a Cr-MOF with functional monomers, including acrylonitrile and vinyl acetate, to improve the selective absorption of IMI from complex fish sample matrixes. The Cr-MOF/polymer composite was well characterized through SEM, BET analysis, FTIR analysis, and TGA. Kinetics and isotherm analyses suggested that the sorbent's adsorption performance was due to H-bonding. Adsorption data fitted well with the Freundlich model ( = 0.991), indicating physisorption, following pseudo-first-order kinetics ( = 1.86, = 0.996). The LOD and LOQ for IMI in fish samples determined through HPLC were 0.004 and 0.012 μg g, respectively. Reusability tests confirmed that the Cr-MOF/polymer composite could be used for over six consecutive cycles. These findings underscore the practical importance of the developed composite in environmental monitoring and enhancing food safety to safeguard public health.
吡虫啉（IMI）在不同环境介质中日益普遍，已成为对生态系统和人类健康的潜在威胁。因此，需要一种可持续、有效且环保的方法来检测IMI。本研究报道了一种新型的Cr-MOF/聚合物复合材料，用于采用分散固相微萃取法检测鱼类中的IMI。这种Cr-MOF/聚合物复合材料是通过将Cr-MOF与功能单体（包括丙烯腈和醋酸乙烯酯）结合而合成的，以提高从复杂鱼类样品基质中选择性吸收IMI的能力。通过扫描电子显微镜（SEM）、比表面积分析（BET）、傅里叶变换红外光谱分析（FTIR）和热重分析（TGA）对Cr-MOF/聚合物复合材料进行了充分表征。动力学和等温线分析表明，吸附剂的吸附性能归因于氢键作用。吸附数据与Freundlich模型拟合良好（R² = 0.991），表明为物理吸附，遵循准一级动力学（k = 1.86，R² = 0.996）。通过高效液相色谱法（HPLC）测定的鱼类样品中IMI的检测限（LOD）和定量限（LOQ）分别为0.004和0.012 μg/g。可重复使用性测试证实，Cr-MOF/聚合物复合材料可连续使用六个以上循环。这些发现强调了所开发的复合材料在环境监测和加强食品安全以保障公众健康方面的实际重要性。
