Determination of ionic liquid cations in soil samples by ultrasound-assisted solid-phase extraction coupled with liquid chromatography-tandem mass spectrometry
文献类型： 外文期刊
作者： Lu, Chunxia 1 ; Tang, Zonggui 1 ; Liu, Changbin 2 ; Chen, Xia 1 ; Wang, Yuan 1 ; Dang, Fumin 1 ;
作者机构： 1.Xinjiang Acad Agr & Reclamat Sci, Anal & Testing Ctr, Shihezi 832000, Peoples R China
2.Xinjiang Acad Agr & Reclamat Sci, Inst Anim Husb & Vet Sci, Shihezi 832000, Peoples R China
期刊名称：ANALYTICAL METHODS （ 影响因子：2.896； 五年影响因子：2.716 ）
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收录情况： SCI
摘要： Liquid chromatography-tandem mass spectrometry coupled with an ultrasonic-assisted extraction and solid phase extraction procedure has been investigated for the separation and detection of imidazolium, pyridinium, pyrrolidinium, ammonium and phosphonium-based ionic liquid (IL) cations in soil samples. First, the samples were extracted with acetonitrile-0.2 mol L-1 ammonium chloride solution (8 : 2, v/v; pH 3) using an ultrasonic assisted extraction procedure and then eluted on a Strata-X-CW solid-phase extraction column. The target compounds were effectively separated with an Agilent SB-C18 (1.88 mu m, 3.0 mm x 100 mm) chromatographic column by gradient elution, in which acetonitrile-water (containing 0.1% formic acid) acted as the mobile phase. The IL cations were determined by electrospray positive ionization (ESI+) combined with multiple reaction monitoring (MRM) mode, and quantified by the matrix-matched external standard method. The limits of detection (LODs) ranged from 0.15 to 2.88 ng g(-1) and the limits of quantification (LOQs) from 0.50 to 9.50 ng g(-1). The average recoveries of the twenty-three IL cations in soil samples were in the range of 69.3-106.8%, with relative standard deviations of 2.17-12.1%. This assay showed greater sensitivity and accuracy, to meet the requirements of the determination of IL cations in soil.
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