权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Analysis of the basics and modelling of the Flow-Field-Thermal-Gradient-Gas-Chromatography

流场热梯度气相色谱基础知识和建模分析

基本信息

批准号：
290980359
负责人：
Privatdozent Dr. Peter Boeker
金额：
--
依托单位：
Institut für Landtechnik (ILT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/290980359?language=en
关键词：
Analysis basics modelling Flow Field

项目摘要

The aim of the research proposal is the analysis of the basics of a new gas chromatographic (GC) method with a longitudinal negative temperature gradient. With such a gradient the chromatographic bands are permanently focussed because the peak fronts are decelerated and the peak tails are accelerated, respectively. This focussing effect compensates the diffusive band broadening. As the temperature level of the column is enhanced simultaneously the substances on the column are trapped at a distinct temperature that is determined by the equivalence of the chromatographic velocity and the velocity of the temperature along the column. In the gradient field the substances therefore move along the column with a constant temperature without the increase in the classical GC mode. In the context of the previous research program of the applicant and following studies of trace gas analytics a technically simple realisation of the thermal gradient GC has been developed. For the first time it is now possible to study the basics of the thermal gradient gas chromatography (TG-GC) with this experimental setup. The first measurement results are quite promising. With measurement times below 60 s high chromatographic resolutions have been obtained. In contrast to the classical GC up to now only limited experiences and no systematic evaluations of the TG-GC are available. The concept promises a largely improved fast separation which is favourable for e.g. gas sensor systems, ion mobility spectrometry and in combination with mass spectrometry. Due to the reduced separation temperatures also thermally labile components such as some aroma compounds, biological substrates and also energetic materials can be separated and analysed by TG-GC.

该研究方案的目的是分析一种新的具有纵向负温度梯度的气相色谱(GC)方法的基本原理。在这样的梯度下，色谱带被永久聚焦，因为峰面减速，峰尾加速。这种聚焦效应补偿了扩散带的展宽。当柱的温度水平同时提高时，柱上的物质在不同的温度下被捕获，该温度由色层速度和沿柱的温度的速度的等效性确定。因此，在梯度场中，物质沿着柱子以恒定的温度移动，而不会在经典的GC模式中增加。在申请人之前的研究计划的背景下，在对痕量气体分析的研究之后，已经开发了一种技术上简单的热梯度GC实现。这是第一次有可能用这个实验装置研究热梯度气相色谱的基本原理。第一批测量结果是相当有希望的。在测量次数小于60次的情况下，S获得了较高的色层分辨率。与经典的GC相比，到目前为止，对TG-GC的研究经验有限，也没有系统的评价。这一概念承诺将大大改进快速分离，这对气体传感器系统、离子迁移率光谱以及与质谱学相结合都是有利的。由于分离温度的降低，一些不耐热的成分，如一些芳香化合物、生物底物和含能物质，也可以用TG-GC进行分离和分析。