Analysis of secondary organic aerosols in air using extractive electrospray ionization mass spectrometry (EESI-MS)

作者：Doezema Lambert A^*; Longin Teresa; Cody William; Perraud Veronique; Dawson Matthew L; Ezell Michael J; Greaves John; Johnson Kathleen R; Finlayson Pitts Barbara J

来源：RSC Advances, 2012, 2(7): 2930-2938.

DOI：10.1039/c2ra00961g

Extractive electrospray ionization mass spectrometry (EESI-MS) has been shown, in other laboratories, to be a useful technique for the analysis of aerosols from a variety of sources. EESI-MS is applied here, for the first time, to the analysis of secondary organic aerosol (SOA) formed from the reaction of ozone and a-pinene. The results are compared to those obtained using atmospheric pressure chemical ionization mass spectrometry (APCI-MS). The SOA was generated in the laboratory and merged with electrospray droplets. The recovered ions were directed towards the inlet of a triple quadrupole mass spectrometer. Through the use of a denuder to remove gas phase compounds, the EESI-MS technique was found to be effective for measuring the major ozonolysis products either in particles alone or in a combination of vapor phase and particulate products. Due to its relatively simple setup and the avoidance of sample collection and work-up, EESI-MS shows promise as an excellent tool for the characterization of atmospherically relevant particles.

• 出版日期2012