Development of novel sol–gel coatings by chemically bonded ionic liquids for stir bar sorptive extraction—application for the determination of NSAIDS in real samples

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• 作者：Wenying Fan (1)
  Xiangju Mao (1)
  Man He (1)
  Beibei Chen (1)
  Bin Hu (1)
  
• 关键词：Stir bar sorptive extraction ; Ionic liquid bonded sol–gel coating ; High ; performance liquid chromatography ; Nonsteroidal anti ; inflammatory drugs ; Environmental waters ; Milk
• 刊名：Analytical and Bioanalytical Chemistry
• 出版年：2014
• 出版时间：November 2014
• 年：2014
• 卷：406
• 期：28
• 页码：7261-7273
• 全文大小：523 KB
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• 作者单位：Wenying Fan (1)
  Xiangju Mao (1)
  Man He (1)
  Beibei Chen (1)
  Bin Hu (1)
  
  1. Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan, 430072, China
  
• ISSN：1618-2650

文摘

In this work, a novel ionic liquid (IL) chemically bonded sol–gel coating was prepared for stir bar sorptive extraction (SBSE) of nonsteroidal anti-inflammatory drugs (NSAIDs) followed by high-performance liquid chromatography-ultraviolet detection (HPLC-UV). By using γ-(methacryloxypropyl)trimethoxysilane (KH-570) as a bridging agent, 1-allylimidazolium tetrafluoroborate ([AIM][BF4]) was chemically bonded onto the bare stir bar, and the prepared IL-bonded sol–gel stir bar coating showed higher extraction efficiency and better adsorption/desorption kinetics for target NSAIDs over other polydimethylsiloxane (PDMS)-based or monolithic stir bar coatings. The mechanical strength and durability (chemical/thermal stability) of the prepared IL-bonded sol–gel coating were excellent. The influencing factors of SBSE, such as sample pH, salt effect, stirring rate, extraction time, desorption solvent, and desorption time, were optimized, and the analytical performance of the developed SBSE-HPLC-UV method was evaluated under the optimized conditions. The limits of detection (LODs) of the proposed method for three NSAIDs were in the range of 0.23-.31?μg?L?, and the enrichment factors (EFs) were in the range of 51.6-6.3 (theoretical enrichment factor was 100). The reproducibility was also investigated at concentrations of 5, 20, and 100?μg?L?, and the relative standard deviations (RSDs) were found to be less than 9.5, 7.5, and 7.6?%, respectively. The proposed method was successfully applied for the determination of NSAIDs in environmental water, urine, and milk samples. Graphical Abstract ?/em>