共查询到18条相似文献,搜索用时 140 毫秒
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气相色谱-质谱联用技术是农药多类多残留检测分析方法发展的起点,液相色谱-质谱联用技术的发展给极性农药、热不稳定性农药及其代谢物的检测创造了条件,高选择性、高灵敏度、高通量的色谱-串联质谱技术创建了农药的多残留检测方法。本文回顾了色质联用技术的进步及其在农药多残留分析方法发展过程中的重要作用。 相似文献
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本文从低分辨质谱的选择性入手,回顾了色谱-质谱联用技术促进多类农药多残留分析技术的发展过程.质谱技术的进步改变了农药残留分析方法:在明确样品干扰物分子结构的基础上建立了相应的样品前处理方法;用采集分子结构信息的质谱检测器代替了色谱的选择性检测器;选择离子检测技术和串联质谱技术提高了排除干扰物的能力.基于质谱技术,已建立... 相似文献
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液相色谱技术及液质联用技术在食品及农产品残留检测中的应用 总被引:6,自引:0,他引:6
讨论液相色谱相关技术及其在残留分析中的应用。介绍了用于样品前处理的固相提取技术(SPE)、液相色谱技术(HPLC)、液质联用技术(LC/MS)的特点,及其在食品及农产品中兽药、农药及毒素类有毒有害物质残留分析中的应用。 相似文献
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目的:建立血液中五种酰胺类除草剂的气相色谱/质谱联用分析方法。方法:采用环己烷液液提取,气相色谱/质谱联用法定性定量。结果:五种酰胺类除草剂与血中杂质分离良好,回收率分别为:甲草胺80.5%,乙草胺81.8%,丙草胺83.6%,丁草胺84.2%,异丙草胺85.03%,最低检出限分别为:甲草胺50ng/mL,乙草胺150ng/mL,丙草胺50ng/mL,丁草胺50ng/mL,异丙草胺50ng/mL,五种除草剂在0.5~10μg/mL之间均呈良好的线性关系,相关系数r〉0.999。结论:该方法操作简单快速,重现性好,适合于刑事案件中此类药物的定性定量分析。 相似文献
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介绍气相色谱和傅立叶变换红外光谱 (GC FTIR)联用分析技术 ,讨论近年来该联用技术分别在联用系统的 4个主要组成部分———气相色谱、傅立叶变换红外光谱仪、接口系统和计算机控制及数据处理中的作用。叙述该联用技术在联用色谱系统、联用接口技术以及数据处理技术等方面的进展和成就。证明气相色谱法独特的分离能力能够与红外光谱的分子结构鉴别能力完美的结合 ,用于分离鉴定各类复杂混合物 ,其检测灵敏度相当高。另外结合研究实际 ,对联用技术在化学反应产物分析以及反应机理研究中的应用进展进行综述和展望。 相似文献
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磺胺类药物残留的色谱分析进展 总被引:1,自引:0,他引:1
本文综述了近年来食品中磺胺类药物残留的色谱分析研究进展,包括气相色谱、气质联用、液相色谱和液质联用.介绍了磺胺类药物残留的种类、结构、危害及限量等.重点列举了近年来使用最多的液相色谱分析方法. 相似文献
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Budde WL 《Mass spectrometry reviews》2004,23(1):1-24
Herbicides are chemical substances that are applied to agricultural soils, gardens, lawns, or plants to destroy or to prevent the growth of undesirable vegetation. The herbicides included in this review are generally synthetic organic compounds that are ingredients in commercial herbicide products that were designated active during late 2002 in the U.S. Environmental Protection Agency's database of registered and canceled pesticide products. The compounds are organized into 21 categories according to their general chemical structures or a common structural group. The herbicides in each category are discussed in terms of their structures, their database electron ionization mass spectra, and their amenability to separation and measurement with gas chromatography, reversed-phase liquid chromatography, and capillary electrophoresis combined with mass spectrometry. Ionization techniques that are considered here are mainly electron ionization, electrospray, and atmospheric pressure chemical ionization. Sixty-six references are provided to herbicide reviews, and to the recent herbicide analytical chemistry and mass spectrometry research literature. 相似文献
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2005~2016这十几年中,电感耦合等离子体质谱(ICP-MS)仪器的性能得到了大幅改善,其灵敏度最高可达106 cps/(1 μg/L, In),稳定性为1%~2%。多接收ICP-MS精密度的提高尤其显著,同位素测量精密度优于0.01%。各类ICP-MS普遍采用高速数据采集技术与数据库技术,使数据处理能力进一步加强。以三重四极杆和高分辨为代表的ICP-MS对基体干扰和多原子离子干扰消除能力进一步加强,绿色节能环保型和智能型ICP-MS也得到了关注。一些电离能较高的贵金属、类金属和非金属元素分析技术得到重视。以激光烧蚀(LA)、高效液相色谱(HPLC)、气相色谱(GC)、离子色谱(IC)、毛细管电泳(CE)、电热蒸发(ETV)和化学气体发生(CVG)为代表的联用技术及形态分析发展快速。单颗粒(SP)和单细胞(SC)等技术与ICP-MS的联用产生了以功能定义的专用ICP-MS,大大扩展了ICP-MS的应用领域。ICP-MS分析技术从传统的无机元素分析发展到有机生物及形态分析,从传统的样品消解后溶液进样分析发展到固体样品在线进样分析,从传统的元素含量分析发展到2D-3D成像分析和高精度同位素分析。ICP-MS在能源、地质、材料、环保、生物医学、食品、国土安全等诸多领域的应用进一步扩展,成熟的ICP-MS分析方法实现了标准化并得到推广和普及。本工作从6个方面总结回顾了2005~2016年间ICP-MS的重要进展,并对其发展前景进行了展望。 相似文献
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联用技术应用于食品中铬形态分析方法概述 总被引:1,自引:0,他引:1
本文对近年来原子光谱、电感耦合等离子体质谱法(ICP-MS)与色谱联用技术在食品样品中铬元素形态分析中的应用进行概述,介绍联用技术离子色谱(IC)、高效液相色谱(HPLC)在形态分析中的应用。 相似文献
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C. J. Miller G. Elias N. C. Schmitt C. Rae 《Sensing and Imaging: An International Journal》2010,11(2):61-75
High performance liquid chromatography and gas chromatography techniques are well documented and widely used for the detection
of trace explosives from organic solvents. These techniques were modified to identify and quantify explosives extracted from
various materials taken from people who had recently handled explosives. Documented techniques were modified to specifically
detect and quantify trace levels of the military explosives, RDX, TNT, and PETN from denim, colored flannel, vinyl, and canvas
extracted in methanol and filtered using no additional sample cleanup of the sample extract prior to analysis. The filtered
methanol extracts were injected directly into several different column types and analyzed by high performance liquid chromatography
using ultraviolet detection and/or gas chromatography using electron capture detection. This paper describes general screening
methods that were used to determine the presence of explosives (RDX, TNT, and PETN) in unknown samples of denim, colored flannel,
vinyl and canvas in addition to techniques that have been optimized for quantification of each explosive from the substrate
extracts. 相似文献
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中药多成分药代动力学是中医药理论和作用机制阐明的重要研究内容。如何全面、准确地描述中药复杂成分在体内的药代动力学过程,诠释中药多成分、多靶标、多途径的特点,需要强有力的分析技术支撑。近年来,多种高通量、快速、自动化的前处理技术显著提升了中药体内外多成分的分离提取效率;色谱、质谱分析技术蓬勃发展,推动了中药体内外多成分的快速鉴别和全面、准确定量;质谱成像等新兴技术不断涌现,为中药多成分药代动力学研究提供了新的分析平台和研究手段。本文综述了近10年来中药多成分药代动力学研究分析技术的进展和应用,并对其前景进行展望。 相似文献
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This overview evaluates the capabilities of mass spectrometry (MS) in combination with gas chromatography (GC) and liquid chromatography (LC) for the determination of a multitude of pesticides. The selection of pesticides for this assessment is based on the status of production, the existence of regulations on maximum residue levels in food, and the frequency of residue detection. GC-MS with electron impact (EI) ionization and the combination of LC with tandem mass spectrometers (LC-MS/MS) using electrospray ionization (ESI) are identified as techniques most often applied in multi-residue methods for pesticides at present. Therefore, applicability and sensitivity obtained with GC-EI-MS and LC-ESI-MS/MS is individually compared for each of the selected pesticides. Only for one substance class only, the organochlorine pesticides, GC-MS achieves better performance. For all other classes of pesticides, the assessment shows a wider scope and better sensitivity if detection is based on LC-MS. 相似文献