TITLE:
Effect of Temperature on Separation of Sarin (GB) Ions in Differential Mobility Spectrometry
AUTHORS:
Miroslaw Maziejuk, Michal Ceremuga, Monika Szyposzyńska, Tomasz Sikora
KEYWORDS:
DMS; Spectrometry; Ion Mobility
JOURNAL NAME:
Open Journal of Physical Chemistry,
Vol.3 No.4,
November
22,
2013
ABSTRACT: Different environmental conditions in which, equipment based on
differential ion mobility spectrometry must operate, forced designers and
engineers to analyze the impact of, among other things, external factors on
their performance and efficiency. These devices, thanks to the DMS technology,
can identify and characterize the ions contained in the gaseous state. However,
many areas of this technique remain undiscovered, which should be examined in
more detail. One such aspect is the influence of the temperature of gaseous
medium, containing tested analyte. The research presented in this article shows why temperature is an important factor on the distribution of generated peaks. The
results are shown for different spectra generated carrier gas temperatures (50°C - 80°C) in
which ions were toxic warfare agents. Based on those graphs, it can
be stated that increase of the temperature allows for better
separation of the peaks from the background. Because of the similar ion
mobility of the analyte and background ions for high and low electric field, DMS
device can send false alarms, due to the poor interpretations of passing a
signal to them. So to be able to accurately assess the level of risk due to the
presence of substances BST in air, the test medium was added to isobutanol and isopropanol additives. They help better analyze and separate measured ions.