Citation: DAI Jian-Xiong, DUAN Yi-Xiang. Research of Influence Factors on Performance of Microwave Induced Plasma Ionization Ion Mobility Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(11): 1686-1691. doi: 10.11895/j.issn.0253-3820.160405 shu

Research of Influence Factors on Performance of Microwave Induced Plasma Ionization Ion Mobility Spectrometry

DAI Jian-Xiong ^1,2, ,
DUAN Yi-Xiang ^2,3

1.
Analytical and Testing Center, Sichuan University, Chengdu 610064, China;
2.
Research Center of Analytical Instrumentation, Sichuan University, Chengdu 610064, China;
3.
School of Life Science, Sichuan University, Chengdu 610064, China

Received Date: 26 May 2016
Revised Date: 18 July 2016

The performance of an ion mobility spectrometer (IMS) was influenced by several factors such as drift field strength, gate pulse width, the operational parameters for ion source, dimensions of the drift tube, the machining quality of ion gate and the transmission of aperture grid. The gate pulse width and drift field strength needed to be tuned to balance the selectivity and sensitivity in real applications. This study investigated the influence of drift field strengths and the gate pulse widths on both selectivity and sensitivity of microwave induced plasma ionization ion mobility spectrometry (MIPI-IMS) made by our laboratory. Experimental results showed that there existed a drift field strength that made the resolving power reach the best. Moreover, the drift field strength for the best resolution was different from each other under different gate pulse widths. Increasing the drift field strength and gate pulse width was propitious to improve the sensitivity of MIPI-IMS. In comparison with other ion source with weak ion current, the MIPI source had strong ion current, which enabled the MIPI-IMS work in wider range in drift field strength and gate pulse width in practice. The results were helpful for the improvement of the performance of MIPI-IMS. Finally, 2-propanol was used to test the performance of the MIPI-IMS. The results showed that the limit of detection of MIPI-IMS could reach 7.7×10^-11 (V/V) and the resolution was 66.
- Microwave induced plasma,
- Ion mobility spectrometry,
- Resolution,
- Sensitivity
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