Atmospheric pressure-ion drift chemical ionization mass spectrometry for detection of trace gas species

Jun Zheng, Alexei Khalizov, Lin Wang, Renyi Zhang

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

This paper describes atmospheric pressure-ion drift chemical ionization mass spectrometry (AP-ID-CIMS) for monitoring of ambient trace species. Operation of the drift tube at atmospheric pressure allows a significantly longer ion-molecule reaction time and eliminates dilution of the ambient samples, while a well-defined electric field inside the drift tube provides the benefits to confine the flight path and velocity of reagent/product ions, to break down ion clusters, and to control the ion-molecule reaction time. The AP-ID-CIMS exhibits advantages over the conventional low pressure ID-CIMS and flow tube AP-CIMS, improving the detection sensitivity by 3 orders of magnitude and a factor of 3, respectively. We demonstrate that the AP-ID-CIMS allows quantification of sulfuric acid concentrations and is capable of detecting gaseous sulfuric acid with a detection limit of less than 105 molecules cm-3, on the basis of 3? of the baseline noise and an integration time of 12 s. A field evaluation of the AP-ID-CIMS is presented for ambient H2SO4 measurements.

Original languageEnglish (US)
Pages (from-to)7302-7308
Number of pages7
JournalAnalytical Chemistry
Volume82
Issue number17
DOIs
StatePublished - Sep 1 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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