HELIOS/SICRIT/mass spectrometry for analysis of aerosols in engine exhaust

Current legislations typically characterize systems of aerosols, such as from vehicle exhaust, primarily by number concentration and size distributions. While potential health threats have a dependence on the particle size, chemical composition particles, including volatile semi-volatile components adsorbed onto nonvolatile cores present at roadside urban settings, is important in understanding impact exhaust particles health. To date, only tools suitable for an online in-depth aerosol characterization are mass spectrometers, which composed complex cost intensive instrumentation. We new analytical system, combines novel inexpensive infrared-radiation-based evaporation system (HELIOS) with commercially available highly efficient atmospheric ionization source (SICRIT) connected to rather low-price ion-trap spectrometer. Our inexpensive, robust mobile HELIOS/SICRIT/Mass Spectrometry enables sensitive analysis particle-associated substances. validate laboratory experiments coated generated under controlled conditions, show that capable identification combustion-generated polycyclic aromatic hydrocarbons relative quantification individual species surfaces. then employ our analyze real-world engine through time-resolved measurements high time resolution (<10 s) changes during different parts test cycle.Copyright © 2021 American Association Aerosol Research