Characterisation of gaseous iodine species detection using the multi-scheme chemical ionisation inlet 2 with bromide and nitrate chemical ionisation methods
Xu-Cheng He,Jiali Shen,Siddharth Iyer,Paxton Juuti,Jiangyi Zhang,Mrisha Koirala,Mikko M. Kytökari,Douglas R. Worsnop,Matti Rissanen,Markku Kulmala,Norbert M. Maier,Jyri Mikkilä,Mikko Sipilä,and Juha Kangasluoma
Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland
Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, 210023 Nanjing, China
Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, 100029 Beijing, China
Norbert M. Maier
Department of Chemistry, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
Jyri Mikkilä
Karsa Ltd., 00560 Helsinki, Finland
Mikko Sipilä
Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland
In this study, the upgraded multi-scheme chemical ionisation inlet 2 is presented. Sulfuric acid, hypoiodous acid, iodine, sulfur dioxide, and hydroperoxyl radicals are calibrated, and the improved ion optics allow us to detect sulfuric acid and iodine-containing molecules at as low as a few parts per quadrillion by volume. Additionally, we confirm the reliable detection of iodic acid using both the nitrate and bromide chemical ionisation methods under atmospherically relevant conditions.
In this study, the upgraded multi-scheme chemical ionisation inlet 2 is presented. Sulfuric...
