Browsing by Subject "calibration procedure"

It is nowadays recognized the importance of investigating mechanisms and processes related to aerosol particles, including those governing to their formation, with condensable vapors acknowledged as key precursors. Atmospheric pressure chemical ionization mass spectrometry has demonstrated exceptional capabilities for in-situ quantitative measurements of these vapors; hence, such analytical technique has been extensively applied for this purpose. Consequently, there is a growing need for measurement guidelines to ensure the comparability of data across the different studies. The study outlined in this thesis was aimed at contributing to the establishment of best practices for calibrating atmospheric pressure chemical ionization mass spectrometers for the measurement of gaseous sulfuric acid and for evaluating the relative detection limit of the instrument. These objectives were pursued through a systematic work on the calibration setup and procedure and on the assessment of the background signal for the system, which is needed to compute the associated detection limit.