Chemical characterization of individual, airborne sub-10-nm particles and molecules

Analytical Chemistry
Shenyi WangM V Johnston

Abstract

A nanoaerosol mass spectrometer (NAMS) is described for real-time characterization of individual airborne nanoparticles. The NAMS includes an aerodynamic inlet, quadrupole ion guide, quadrupole ion trap, and time-of-flight mass analyzer. Charged particles in the aerosol are drawn through the aerodynamic inlet, focused through the ion guide, and captured in the ion trap. Trapped particles are irradiated with a high-energy laser pulse to reach the "complete ionization limit" where each particle is thought to be completely disintegrated into atomic ions. In this limit, the relative signal intensities of the atomic ions give the atomic composition. The method is first demonstrated with sucrose particles produced with an electrospray generator. Under the conditions used, the particle detection efficiency (fraction of charged particles entering the inlet that are subsequently analyzed) reaches a maximum of 10(-4) at 9.5 nm in diameter and the size distribution of trapped particles has a geometric standard deviation of 1.1 based on a log-normal distribution. A method to deconvolute overlapping multiply charged ions (e.g. C3+ and O4+) is presented. When applied to sucrose spectra, the measured C/O atomic ratio is 1.1, which matches the...Continue Reading

References

May 9, 2000·Journal of Mass Spectrometry : JMS·M V Johnston
Jan 31, 2002·Analytical Chemistry·W D Reents, M J Schabel
Jul 19, 2005·Journal of the Air & Waste Management Association·Pratim Biswas, Chang-Yu Wu
Aug 5, 2005·Environmental Health Perspectives·Constantinos SioutasManisha Singh

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Citations

Feb 15, 2013·Analytical and Bioanalytical Chemistry·Joseph P Klems, Murray V Johnston
Oct 24, 2012·Chemical Reviews·Haihan ChenVicki H Grassian
Mar 23, 2012·Environmental Science & Technology·Bryan R BzdekMurray V Johnston
Feb 9, 2013·Environmental Science & Technology·Wiley A HallMurray V Johnston
Jan 30, 2013·Journal of Occupational and Environmental Hygiene·Alexandra NoëlJoseph Zayed
Jul 19, 2008·Annual Review of Analytical Chemistry·Kimberly A PratherVicki H Grassian
Jan 6, 2016·Journal of the American Society for Mass Spectrometry·Yue Wu, Murray V Johnston
Apr 1, 2016·The Journal of Physical Chemistry. a·Gao-Lei HouXue-Bin Wang
Dec 30, 2014·Analytical and Bioanalytical Chemistry·Jevgeni Parshintsev, Tuulia Hyötyläinen
Oct 25, 2006·Applied Spectroscopy·Murray V JohnstonMelissa S Reinard
Oct 17, 2018·Small·Xingwu SunNiels R Tas
Sep 20, 2008·Environmental Science & Technology·Christopher A ZordanMurray V Johnston
Nov 20, 2009·Environmental Science & Technology·Katherine J HeatonMurray V Johnston
Oct 1, 2010·Analytical Chemistry·Bryan R Bzdek, Murray V Johnston
Sep 2, 2010·Analytical Chemistry·Christopher A ZordanMurray V Johnston
Jul 25, 2013·The Journal of Physical Chemistry. a·Christopher J Johnson, Mark A Johnson
Feb 3, 2012·Analytical Chemistry·Joseph P KlemsMurray V Johnston
Feb 23, 2011·Analytical Chemistry·Melanie D ZauscherKimberly A Prather
Sep 10, 2014·Environmental Science & Technology·Bryan R BzdekMurray V Johnston

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