共查询到19条相似文献,搜索用时 46 毫秒
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固相微萃取(Solid-phase microextraction,SPME)技术因其具有操作简单、萃取时间短、无需有机溶剂、易于自动化操作等优点,成为近年来发展起来的一种新型样品前处理技术。涂层是SPME技术的核心,决定了涂层萃取的选择性和容量。离子液体和聚离子液体因具有环境友好、蒸汽压低、热稳定性好、设计灵活、粘度大等特点,已作为一类新的涂层材料广泛应用于SPME,并对各种分析物均展现出良好的萃取效果和选择性。本文从制备技术、形貌、选择性、稳定性、寿命、应用等方面综述了近年来离子液体和聚离子液体基SPME涂层的研究进展,对它们的优缺点进行了对比讨论,并对其未来发展方向进行了展望。 相似文献
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新一代萃取分离技术──固相微萃取 总被引:55,自引:2,他引:55
介绍了一种新型样品制备法——固相做萃取(SPME)的原理及其应用。与其它样品制备技术相比,SPME法具有操作时间短、样品量小、无需萃取溶剂、适于分析挥发性与非挥发性物质、重视性好等优点。 相似文献
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作为治疗抑郁、焦虑、强迫等精神障碍疾病的主要药物,抗抑郁药的消耗量逐年增大.针对涉及抗抑郁药滥用的各类案件,物证鉴定人员需对药物的种类及含量进行分析.为准确、灵敏地检测实际检材中的抗抑郁药,样品前处理过程必不可少.磁性固相萃取采用比表面积大、分散性能好、可重复使用的各类功能化磁性材料作为吸附剂,因操作简单快速、萃取效率... 相似文献
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近年国内固相萃取-色谱分析的进展 总被引:7,自引:0,他引:7
对近两年国内各个领域的学者在使用固相萃取做样品前处理的色谱分析方面的研究和应用作了综述, 这一综述包括10个部分: 1. 国内近两年有关固相萃取的综述报告;2. 固相萃取-色谱分析在水质分析中的应用;3. 固相萃取-色谱分析在奶制品和肉类食品分析中的应用;4. 固相萃取-色谱用于蔬菜和水果中有害物质分析的应用;5. 固相萃取-色谱用于粮食和其他食品中有害物质分析的应用;6. 固相萃取-色谱在血药浓度、体液及组织中有害物质分析中的应用;7. 固相萃取-色谱在药物分析中的应用;8. 固相萃取-色谱在其他使用色谱分析中的应用;9. 基质固相分散在色谱分析中的应用;10. 分子印迹SPE在样品前处理中的应用. 相似文献
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固相微萃取在药品和生物样品分析中的应用 总被引:22,自引:0,他引:22
按被分析的样品的性质分类 ,对 2 0世纪 90年代发展起来的一种新型样品预处理技术固相微萃取技术在药品及生物样品分析中的应用实例进行了综述 ,共 6 0篇。 相似文献
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《Analytical letters》2012,45(8):1675-1681
ABSTRACT A novel sol-gel method is applied for the preparation of solid-phase microextraction (SPME) fibers. Scanning electron microscopy experiments suggested a porous structure for the poly(dimethylsiloxane) (PDMS) coating. SPME-GC analysis provided evidence that the sol-gel fibers have some advantages, such as high thermal stability, efficient extraction rates, high velocities of mass transfer, and spacious range of application. 相似文献
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The efficiency of polyaniline (PANI), coated gold wire was investigated for use as a fiber for solid-phase microextraction (SPME). Aniline monomers were electropolymerized on gold wires by applying a constant current to an acetate buffer containing NaClO4 as supporting electrolyte for 30 min. These fibers were used for the extraction of some aliphatic alcohols from gaseous samples. The results obtained proved the ability of PANI fiber for sampling organic compounds from gaseous samples. From this work, optimum conditions for preparation and conditioning of fibers and for the extraction of analytes from gaseous samples were obtained. Under optimum conditions, one fiber was used for several equivalent analyses and the relative standard deviations (RSD) were <7% (n=6). However, fiber to fiber reproducibility was <9% (n=6). This fiber is firm and durable and is simply prepared. Calibration graphs were linear in the range: 0.1–10 g mL–1 for aliphatic alcohols; the detection limit range was 15–75 ng mL–1 (S/N=3) using a flame ionization detector. 相似文献
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A new in-loop solid-phase microextraction coupled with high performance liquid chromatography was developed for a fast and easy on line extraction, pre-concentration and LC analysis of moderately polar compounds from non-polar solvents. The inner surface of a long and small bore aluminum tube was electrochemically coated by Al2O3 and used as a new in-tube SPME device which can be also replaced to the injection loop in LC to achieve automated in-loop SPME-LC analysis. Large volume of n-hexane containing trace amounts of phenol and biphenyl was passed through the loop. The analytes were then desorbed by a small volume of methanol and introduced into chromatographic column. This technique was successfully used to analyses of different groups of moderately polar compounds. In this work, phenol and biphenyl were selected as the model compounds. Effect of various parameters affecting in-loop solid-phase microextraction and chromatographic procedure were investigated. Under the optimum conditions the calibration graph were linear in the range of 10–1000 ng mL?1 and 50–1500 ng mL?1 the detection limits were 2.5 and 8 ng mL?1 for phenol and biphenyl, respectively. The relative standard deviations (RSDs) were < 2.4 and < 4.9% for phenol and biphenyl respectively. Concentration factor obtained for these compounds were more than 100 folds. The prepared SPME capillary tube (loop) is sturdy, inexpensive, and durable, and can be easily coupled with LC. 相似文献
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用于磷酸酯和甲基膦酸酯类化合物测定的固相微萃取新型涂层 总被引:1,自引:0,他引:1
以羟基硅油和二乙烯基苯为涂层材料 ,采用溶胶 凝胶技术和自由基引发交联的方法制备了一种新型的固相微萃取探头。采用顶空固相微萃取与气相色谱联用的方法模拟检测了水中磷酸酯和甲基磷酸酯类化合物。与商品化固相微萃取探头相比 ,该新型涂层可获得高的萃取效率。甲基膦酸二甲酯、磷酸三甲酯和磷酸三丁酯的最低检测限分别为 0 34,2 2 0和 0 0 1mg/L,相对标准偏差为 3 6 7%~ 6 4 4 % ,线性范围为 1~ 2个数量级 ,方法重现性好 ,回收率为 89 4 6 %~ 90 88%。 相似文献