Soot Particle Aerosol Mass Spectrometer: Development, Validation, and Initial Application
Open Access
- 7 February 2012
- journal article
- research article
- Published by Informa UK Limited in Aerosol Science and Technology
- Vol. 46 (7), 804-817
- https://doi.org/10.1080/02786826.2012.663948
Abstract
The Soot Particle Aerosol Mass Spectrometer (SP-AMS) was developed to measure the chemical and physical properties of particles containing refractory black carbon (rBC). The SP-AMS is an Aerodyne Aerosol Mass Spectrometer (AMS) equipped with an intracavity laser vaporizer (1064 nm) based on the Single Particle Soot Photometer (SP2) design, in addition to the resistively heated, tungsten vaporizer used in a standard AMS. The SP-AMS can be operated with the laser vaporizer alone, with both the laser and tungsten vaporizers, or with the tungsten vaporizer alone. When operating with only the laser vaporizer, the SP-AMS is selectively sensitive to laser-light absorbing particles, such as ambient rBC-containing particles as well as metal nanoparticles, and measures both the refractory and nonrefractory components. When operated with both vaporizers and modulating the laser on and off, the instrument measures the refractory components of absorbing particles and the nonrefractory particulate matter of all sampled particles. The SP-AMS design, mass spectral interpretation, calibration, and sensitivity are described. Instrument calibrations yield a sensitivity of greater than 140 carbon ions detected per picogram of rBC mass sampled, a 3σ detection limit of less than 0.1 μg·m−3 for 60 s averaging, and a mass-specific ionization efficiency relative to particulate nitrate of 0.2 ± 0.1. Sensitivities were found to vary depending upon laser-particle beam overlap. The utility of the instrument to characterize ambient rBC aerosol is demonstrated. Copyright 2012 American Association for Aerosol ResearchKeywords
This publication has 51 references indexed in Scilit:
- Cardiovascular health and particulate vehicular emissions: a critical evaluation of the evidenceAir Quality, Atmosphere & Health, 2009
- Interpretation of organic components from Positive Matrix Factorization of aerosol mass spectrometric dataAtmospheric Chemistry and Physics, 2009
- Laser mass spectrometric detection of extraterrestrial aromatic molecules: Mini-review and examination of pulsed heating effectsProceedings of the National Academy of Sciences of the United States of America, 2008
- Collection Efficiencies in an Aerodyne Aerosol Mass Spectrometer as a Function of Particle Phase for Laboratory Generated AerosolsAerosol Science and Technology, 2008
- Measurement of the mixing state, mass, and optical size of individual black carbon particles in urban and biomass burning emissionsGeophysical Research Letters, 2008
- Measurements of Morphology Changes of Fractal Soot Particles using Coating and Denuding Experiments: Implications for Optical Absorption and Atmospheric LifetimeAerosol Science and Technology, 2007
- Associations between Health Effects and Particulate Matter and Black Carbon in Subjects with Respiratory DiseaseEnvironmental Health Perspectives, 2005
- A technology‐based global inventory of black and organic carbon emissions from combustionJournal of Geophysical Research: Solid Earth, 2004
- Warming of the Arctic lower stratosphere by light absorbing particlesGeophysical Research Letters, 2004
- Positive matrix factorization: A non‐negative factor model with optimal utilization of error estimates of data valuesEnvironmetrics, 1994