Synthesis and Characterization of a Magnetic Molecular Imprinted Polymer for Tetracycline Quantification in Food Samples

表征(材料科学) 分子印迹聚合物 四环素 聚合物 化学 材料科学 色谱法 环境化学 纳米技术 有机化学 生物化学 选择性 抗生素 催化作用
作者
Shakeel Zeb,Ademar Wong,Sabir Khan,Sajjad Hussain,Marı́a Del Pilar Taboada Sotomayor
出处
期刊:ChemistrySelect [Wiley]
卷期号:9 (19) 被引量:4
标识
DOI:10.1002/slct.202400346
摘要

Abstract In the present work, we synthesized and tested a magnetic molecularly imprinted polymer (mag‐MIP) sensor for the detection of tetracycline in food samples. High‐performance liquid chromatography (HPLC) and spectrofluorometry were employed for tetracycline determination. The mag‐MIP was polymerized on the surface of Fe 3 O 4 @SiO 2 magnetic nanoparticles using the following substances: 4 mmol of methacrylic acid as the functional monomer, 20 mmol of ethylene glycol dimethacrylate (EGDMA) as the cross‐linking agent, 82.5 mg of benzoyl peroxide as the radical initiator, and 30 ml of acetonitrile as the solvent. The physicochemical characteristics of the proposed mag‐MIP, including adsorption capabilities and selectivity, were studied and compared with those of a magnetic non‐molecularly imprinted polymer (mag‐NIP). The analytical curve was constructed in the range of 1.0×10 −5 –8.0×10 −5 mol L −1 , LOD: 3.3×10 −6 , LOQ: 1.1×10 −5 mol L −1 . The results obtained from the adsorption analysis showed that the highest adsorption capacity of the mag‐MIP at equilibrium was 8.247 mg g −1 and that the tetracycline adsorption process followed the Langmuir adsorption isotherm model and pseudo‐second‐order reaction kinetics. The proposed mag‐MIP also exhibited good results when subjected to fluorescence analysis; an increase in tetracycline concentration resulted in an increase in the adsorption capacity, and this led to the effective removal of tetracycline with the reduction of fluorescence intensity. The applicability of the proposed mag‐MIP was evaluated in honey, cow milk, and egg samples through recovery tests conducted using samples containing spiked tetracycline concentration at two different concentration levels (1.7×10 −5 and 2.5×10 −5 mol L −1 ), where we obtained recovery percentages in the range of 73.2–87.2 % (HPLC ) and 90.5–103.7 % (spectrofluorometry).
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