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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Development of a novel high volume band compression injector for the analysis of complex samples like toxaphene pesticide
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Development of a novel high volume band compression injector for the analysis of complex samples like toxaphene pesticide

机译：新型高容量带压缩进样器的开发，用于分析复杂样品，如毒杀芬农药

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A new type of injector has been developed for gas chromatographic analysis. The injector has high volume and band compression (HVBC) capabilities useful for the analysis of complex samples. The injector consists essentially of a packed liner operated at room temperature while a narrow heated zone is used to axially scan the liner selectively desorbing the compounds of interest. The scanning speed, distance and temperature of the zone are precisely controlled. The liner is connected to an interface which can vent the solvent or any undesirable compounds, and transfer the analytes to an analytical column for separation and quantification. The injector is designed to be compatible with injection volumes from I to more than 250 mu L At a low sample volume of I mu L, the injector has competitive performances compared to those of the "on-column" and "split/splitless" injectors for the fatty acid methyl esters and toxaphene compounds tested. For higher volumes, the system produces a linear response according to the injected volume. In this explorative study, the maximum volume injected seems to be limited by the saturation of the chromatographic system instead of being defined by the design of the injector. The HVBC injector can also be used to conduct "in situ" pretreatment of the sample before its transfer to the analytical column. For instance, a toxaphene sample was successively fractionated, using the HVBC injector, in six sub-fractions characterized by simpler chromatograms than the chromatogram of the original mixture. Finally, the ability of the HVBC injector to "freeze" the separation in time allowing the analyst to complete the analysis at a later time is also discussed. (C) 2008 Elsevier B.V. All rights reserved.
机译：已经开发出一种新型的进样器用于气相色谱分析。进样器具有高体积和带压缩（HVBC）功能，可用于分析复杂样品。进样器主要由在室温下操作的填充衬管组成，而狭窄的加热区用于轴向扫描衬管，从而选择性地脱附目标化合物。区域的扫描速度，距离和温度得到精确控制。衬管连接到可以排放溶剂或任何不良化合物的界面，并将分析物转移到分析柱中进行分离和定量。进样器设计为与I至250μL以上的进样量兼容。在低至1μL的样品量下，与“柱上”和“分流/不分流”进样器相比，该进样器具有竞争优势用于测试脂肪酸甲酯和毒杀芬化合物。对于更大的体积，系统会根据注入的体积产生线性响应。在这项探索性研究中，最大进样量似乎受色谱系统饱和度的限制，而不是由进样器的设计来定义。 HVBC进样器还可用于在样品转移到分析柱之前对样品进行“原位”预处理。例如，使用HVBC进样器将毒杀芬样品依次分馏为六个亚组分，这些亚组分的色谱图要比原始混合物的色谱图简单。最后，还讨论了HVBC喷射器及时“冻结”分离的能力，使分析人员可以在稍后的时间完成分析。 （C）2008 Elsevier B.V.保留所有权利。

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