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Applications and limitations of constrained high-resolution peak fitting on low resolving power mass spectra from the ToF-ACSM

Applications and limitations of constrained high-resolution peak fitting on low resolving power mass spectra from the ToF-ACSM

High-resolution peak fitting can be used to extract more detailed data on aerosol chemical composition when compared to using unit mass resolution spectra only.

Finnish Meteorological Institute in co-operation with Tofwerk AG, Aerodyne Research Inc and Alfred Wegener Institute studied the applicability of high-resolution peak fitting on low resolving power mass spectra measured with a time-of-flight aerosol chemical speciation monitor (ToF-ACSM). Calibration measurements as well as ambient data are used to exemplify the methods that should be applied to maximise data quality and assess confidence in peak fitting results. Information on aerosol sulfate, nitrate, sodium chloride, methanesulfonic acid as well as semi-volatile metal species retrieved from these methods are evaluated.

For more information:

Researcher Hilkka Timonen, Hilkka.timonen@fmi.fi

(Timonen et al., 2016)

Timonen, H., Cubison, M., Aurela, M., Brus, D., Lihavainen, H., Hillamo, R., Canagaratna, M., Nekat, B., Weller, R., Worsnop, D., and Saarikoski, S.: Applications and limitations of constrained high-resolution peak fitting on low resolving power mass spectra from the ToF-ACSM, Atmospheric Measurement Techniques, 9, 3263-3281, 10.5194/amt-9-3263-2016, 2016.

http://www.atmos-meas-tech.net/9/3263/2016/amt-9-3263-2016-discussion.html

 


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