Atmospheric. pressure air direct current glow discharge ionization source for ion mobility spectrometry

被引：28

作者：

Dong, Can ^{[1
,2
]}

Wang, Weiguo ^{[1
]}

Li, Haiyang ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

ANALYTICAL CHEMISTRY | 2008年 / 80卷 / 10期

关键词：

D O I：

10.1021/ac800197g

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A new atmospheric pressure air direct current glow discharge (DCGD) ionization source has been developed for ion mobility spectrometry (IMS) to overcome the regularity problems associated with the conventional Ni-63 source and the instability of the negative corona discharge. Its general electrical characteristics were experimentally investigated. By equipping it to IMS, a higher sensitivity was obtained compared to that of a Ni-63 source and corona discharge, and a linear dynamic range from 20 ppb to 20 ppm was obtained for m-xylene. Primary investigations showed that alkanes, such as pentane, which are nondetectable or insensitively detectable with Ni-63-IMS, can be efficiently detected by DCGD-IMS and the detection limit of 10 ppb can be reached. The preliminary results have shown that the new DCGD ionization source has great potential applications in IMS, such as online monitoring of environment pollutants and halogenated compounds.

引用

页码：3925 / 3930

页数：6

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