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| Application of Ionic Liquid Modified Magnetic Zeolitic Imidazolate Framework Material in Analysis of Microcystins |
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| DOI： |
| KeyWord:magenetic solid-phase extraction （MSPE） zeolitic imidazolate framework ionic liquid ultra performance liquid chromatography-tandem mass spectrometry（UPLC-MS/MS） microcystins(MCs) |
| Author | Institution |
| WU Yi-qiu,GAO Shi-qian,LI Xiao-meng,ZHANG Zhan-en |
1.苏州科技大学环境科学与工程学院;2.苏州科技大学江苏省水处理技术与材料协同创新中心 |
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| Abstract: |
| A method was developed for the determination of trace amount of MC-RR and MC-LR in surface water by ultra performance liquid chromatography-mass spectrometry（UPLC-MS/MS）combined with magnetic solid-phase extraction（MSPE） based on ionic liquid modified magnetic zeolitic imidazolate framework material（IL@M/ZIF-8）.The synthesized material was characterized by scanning electron microscopy（SEM） and transmission electron micorscopy（TEM）.The experimental conditions in MSPE and UPLC-MS/MS,including dosage of adsorbent,pH value,type of elution solvent and oscillation time were optimized.Results showed that,under the optimal conditions,there were good linear relationships for MC-RR and MC-LR in the ranges of 0.01-5 μg/L and 0.05-5 μg/L,with their correlation coefficients（r） of 0.999 5 and 0.999 3,respectively.The detection limits were 1.98,3.94 ng/L,and the quantitation limits were 6.52,12.98 ng/L,respectively.The method was applied in the analysis of microcystins in water with spiked recoveries of 88.5%-108% and relative standard deviations of 1.5%-7.2%.The method could be used for the detection of trace microcystins in water samples owing to its simplicity and high sensitivity. |
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