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氟固相萃取(Fluorous solid-phase extraction,FSPE)是一种基于全氟化合物之间氟-氟相互作用的固相萃取技术,通过在目标分子上进行氟标签衍生,利用高氟化固相吸附剂实现特异性的分离纯化.这一技术在有机合成、催化,以及化学和生物分离分析等诸多领域应用广泛.近年来,由于氟固相萃取和生物质谱技术之间良好的兼容性,两者联用结合的分析方法受到了研究者的广泛关注.本文在简要介绍氟固相萃取技术原理的基础之上,重点综述了其在生物质谱分析领域中的应用,并对其发展前景进行了展望. 相似文献
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生物油中有机化合物的分析与表征 总被引:1,自引:0,他引:1
综述了目前国内外生物油成分分析的状况,重点介绍了红外光谱、核磁共振、质谱、气相色谱、高效液相色谱技术以及波谱-色谱联用技术在生物油有机小分子化合物结构表征方面的应用,评价了这些技术在生物油结构表征方面的作用和价值,并分析了生物油的理化特性及化学结构对检测分析产生的影响。此外,对生物油中的低聚糖和热解木质素等低聚物的分析检测研究也进行了介绍。最后,总结了波谱和色谱技术在生物油检测分析方面存在的主要问题,并对生物油中有机物检测与分析的发展趋势进行了展望。 相似文献
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《中国科学:化学》2017,(12)
复杂混合物体系中化合物类型多样,理化性质各异,对其组成成分进行定性定量分析一直是分析化学研究的热点问题.液相色谱与质谱联用(liquid chromatography-mass spectroscopy,LC-MS),尤其是超高效液相色谱(ultra-high performance liquid chromatography,UPLC)结合高分辨质谱(high resolution mass spectrometry,HRMS)是复杂样品分析的有力工具.UPLC能够极大程度提高色谱分离能力和效率,为复杂混合物中各组分的有效分离提供保证;HRMS能够提供高精确的分子质量,提高定性定量分析的可靠性和准确性.本文综述了LC-MS技术在分析典型的复杂混合物体系(尿液、血液、细胞代谢物及天然产物提取物)中小分子化合物组分及含量中的应用,主要从样品制备、数据采集、数据(前)处理、目标化合物的定性定量分析及多样本多变量分析(代谢组学分析)用于差异代谢物(生物标志物)的发现等方面展开,并对LC-MS技术用于复杂混合物样品分析当前存在的问题及未来的发展进行了总结和展望 相似文献
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色谱联用技术的进展 总被引:2,自引:0,他引:2
魏秀萍 《分析测试技术与仪器》2007,13(4):291-294
介绍了色谱与质谱、红外、原子光谱、热分析仪等手段的联用技术以及这些联用技术的进展情况.并展望了色谱技术的应用前景. 相似文献
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电感耦合等离子体质谱(ICP-MS)联用技术的应用及展望 总被引:2,自引:0,他引:2
总结了ICP-MS联用技术在国内外检测领域的最新应用,并就"分离器与ICP-MS"、"进样系统与ICP-MS"、"ICP-MS与其它仪器物理联用"等联用技术进行了分类、拓展和总结。ICP-MS联用技术的发展重点将倾向于提高分析精密度、复杂基体元素超痕量分析、同位素比值及形态研究领域,相关联用技术的国家标准或行业标准出台已迫在眉睫。 相似文献
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Exarchou V Fiamegos YC van Beek TA Nanos C Vervoort J 《Journal of chromatography. A》2006,1112(1-2):293-302
Phytochemical analysis is an important scientific research area, which normally relies on a number of rather laborious and time-consuming techniques for compound identification. Isolation of the ingredients of plant extracts in adequate quantities for spectral and biological analysis was the basis of this research. In this paper the possibility of on-line rapid screening of antioxidant components in methanolic plant extracts and their subsequent identification is reported. Based exclusively on hyphenated chromatographic techniques the methanolic extracts of Tilia europea, Urtica dioica, Lonicera periclymenum and Hypericum perforatum are initially screened for their antioxidant components via an on-line DPPH and ABTS radical scavenging technique. Structural elucidation of the active analytes is achieved by means of LC-MS and LC-UV-SPE-NMR. After the determination of the appropriate LC gradient, a minimal number of chromatographic runs with these hyphenated techniques are adequate for the acquisition of the necessary data, leading to the identification of the targeted compounds. Based on their UV, NMR and MS spectra, the antioxidant compounds identified in the extracts under study were found to be either flavonoid glycosides or mono- and dicaffeoylquinic acids. Although the aim of the study was to show the great potential of the LC-UV-NMR-DPPH/ABTS approach for the rapid screening and identification of plant constituents, the results produced in the course of this study also have some merit by themselves. Some of the compounds detected are reported for the first time in the specific plant extracts. 相似文献
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联用技术测定富硒农产品中硒的形态研究进展 总被引:1,自引:0,他引:1
硒的营养功能与农产品硒的形态息息相关。联用技术作为元素形态分析的有效方法,近年来受到了人们广泛关注。对用联用技术测定富硒农产品中硒的形态研究现状及进展进行了综述,包括前处理技术、色谱分离技术和定量检测方法等3个方面。 相似文献
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Single-drop microextraction (SDME) and sequential injection analysis have been hyphenated for ultratrace metal determination by Electrothermal-Atomic Absorption Spectrometry (ETAAS). The novel method was targeted on extraction of the Cr(VI)-APDC chelate and encompasses the potential of SDME as a miniaturized and virtually solvent-free preconcentration technique, the ability of sequential injection analysis to handle samples and the versatility of furnace autosamplers for introducing microliter samples in ETAAS. 相似文献
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断层扫描分析法用于联用色谱二维数据的解析Ⅰ定性分析:原理与应用 总被引:1,自引:0,他引:1
提出一种对色谱-光谱二维数据进行信息处理的全新手段——断层扫描分析法。它以逐层“剥离”的方式对二维数据进行“断层扫描”,并结合褶合曲线:兮析理论进行数据挖掘,可实现色谱峰纯度检验和归属判定、重叠色谱峰解折与定量分析等功能,并最终获得分析体系的全部定性定量信息。本文介绍了断层扫描分析法用于定性分析的原理及其在实验体系中的应用情况。结果表明:断层扫描分析法用于定性分析可实现色谱峰定性(归属)鉴别、纯度检验以及选择性区域的识别等,在中药等复杂体系的分析中具有重要的研究意义和良好的应用前景。 相似文献
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LIANG Yi-Zeng 《高等学校化学学报》1999,20(Z1):454
Any Chinese medicines, including herbals and compound formulea, are very complex multicomponent systems. With the help of the new methods recently developed in chemometrics and hyphenated instruments, such as HPLC-DAD,GC-MS, HPLC-MS, CE-DAD and GC-IR, the comprehensive chemical composition analysis of Chinese medicines becomes possible. The analysis of Cordyceps sinensis and Pueraria and Coptis pill has been conducted in our research group. Some interesting results have been obtained, which showed the promising perspective on this direction. 相似文献