Journal
AEROSOL SCIENCE AND TECHNOLOGY
Volume 53, Issue 1, Pages 86-93Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/02786826.2018.1544704
Keywords
-
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [16H05620, 17H01862]
- Grants-in-Aid for Scientific Research [16H05620, 17H01862] Funding Source: KAKEN
Ask authors/readers for more resources
Thermal desorption aerosol mass spectrometers (TDAMSs) with electron ionization are widely used for quantitative analysis of aerosol chemical composition, and the ionization efficiency of evolved gas molecules from aerosol particles is an important parameter for such analysis. We performed laboratory experiments using a custom-made TDAMS to investigate the key factors affecting ionization efficiency. Ammonium chloride (NH4Cl) and ammonium iodide (NH4I) were used as test compounds because their thermal decomposition products are expected to be simple (dominated by ammonia (NH3) and hydrogen halide (HX)). The ion signals originating from NH3 and HX were measured by altering the position of the ionizer relative to the vaporization point. The ratio of ion signal from NH3 to that from HX increased with increasing divergence angle of evolved gas plumes, which suggests that the angular distribution of gas molecules could be an important factor affecting the ionization efficiency. Copyright (c) 2018 American Association for Aerosol Research
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available