Kirk Ansgar T, Last Torben, Zimmermann Stefan
Leibniz Universität Hannover, Institute of Electrical Engineering and Measurement Technology, Appelstr. 9A, 30167 Hannover, Germany.
Leibniz Universität Hannover, Institute of Electrical Engineering and Measurement Technology, Appelstr. 9A, 30167 Hannover, Germany.
J Chromatogr A. 2017 Feb 3;1483:120-126. doi: 10.1016/j.chroma.2016.12.071. Epub 2016 Dec 24.
In this work, we present a novel concept for a gas chromatography detector utilizing an atmospheric pressure chemical ionization which is initialized by a dielectric barrier discharge. In general, such a detector can be simple and low-cost, while achieving extremely good limits of detection. However, it is non-selective apart from the use of chemical dopants. Here, a demonstrator manufactured entirely from fused silica capillaries and printed circuit boards is shown. It has a size of 75×60×25mm and utilizes only 2W of power in total. Unlike other known discharge detectors, which require high-purity helium, this detector can theoretically be operated using any gas able to form stable ion species. Here, purified air is used. With this setup, limits of detection in the low parts-per-billion range have been obtained for acetone.
在这项工作中，我们提出了一种用于气相色谱检测器的新颖概念，该检测器利用由介质阻挡放电初始化的大气压化学电离。一般来说，这种检测器可以简单且低成本，同时实现极佳的检测限。然而，除了使用化学掺杂剂外，它是非选择性的。在此展示了一个完全由熔融石英毛细管和印刷电路板制造的演示器。它的尺寸为75×60×25毫米，总功耗仅为2瓦。与其他需要高纯度氦气的已知放电检测器不同，该检测器理论上可以使用任何能够形成稳定离子物种的气体运行。在此使用的是净化空气。通过这种设置，已获得丙酮在十亿分率低范围内的检测限。
