High-Resolution Electrospray Ionization Mass Spectrometry Analysis of Water- Soluble Organic Aerosols Collected with a Particle into Liquid Sampler

Journal Article · Fri Oct 01 04:00:00 EDT 2010 · Analytical Chemistry, 82(19):8010-8016

DOI:https://doi.org/10.1021/ac1014386· OSTI ID:1000575

Bateman, Adam P; Nizkorodov, Serguei; Laskin, Julia; Laskin, Alexander

This work demonstrates the utility of a particle-into-liquid sampler (PILS) a technique traditionally used for identification of inorganic ions present in ambient or laboratory aerosols for the analysis of water soluble organic aerosol (OA) using high resolution electrospray ionization mass spectrometry (HR ESI-MS). Secondary organic aerosol (SOA) was produced from 0.5 ppm mixing ratios of limonene and ozone in a 5 m3 Teflon chamber. SOA was collected simultaneously using a traditional filter sampler and a PILS. The filter samples were later extracted with either water or acetonitrile, while the aqueous PILS samples were analyzed directly. In terms of peak intensities, types of detectable compounds, average O:C ratios, and organic mass to organic carbon ratios, the resulting high resolution mass spectra were essentially identical for the PILS and filter based samples. SOA compounds extracted from both filter/acetonitrile extraction and PILS/water extraction accounted for >95% of the total ion current in ESI mass spectra. This similarity was attributed to high solubility of limonene SOA in water. In contrast, significant differences in detected ions and peak abundances were observed for pine needle biomass burning organic aerosol (BBOA) collected with PILS and filter sampling. The water soluble fraction of BBOA is considerably smaller than for SOA, and a number of unique peaks were detectable only by the filter/acetonitrile method. The combination of PILS collection with HR-ESI-MS analysis offers a new approach for molecular analysis of the water-soluble organic fraction in biogenic SOA, aged photochemical smog, and BBOA.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1000575
• Report Number(s): PNNL-SA-74272; 39490; 39957; KP1704020
• Journal Information: Analytical Chemistry, 82(19):8010-8016, Journal Name: Analytical Chemistry, 82(19):8010-8016 Journal Issue: 19 Vol. 82
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
ACETONITRILE
AEROSOLS
BIOMASS
CARBON
Environmental Molecular Sciences Laboratory
IONIZATION
MASS SPECTRA
MASS SPECTROSCOPY
MIXING RATIO
OZONE
PINES
RESOLUTION
SAMPLERS
SAMPLING
SMOG
SOLUBILITY
TEFLON
WATER