V035-07
Single Particle Inductively Coupled Plasma Mass Spectrometry for Suspended Micro- and Nanoparticle Number Concentration and Elemental Composition Measurement with Application to Ice Cores

Monday, 14 December 2020: 07:24
Virtual
John Olesik1, Aja Ellis2, Madeleine Claire Lomax-Vogt3, Garret Bland4, Luke Monroe5, Ryan C Sullivan6 and Paolo Gabrielli2, (1)The Ohio State University, School of Earth Sciences, Columbus, OH, United States, (2)The Ohio State University, Byrd Polar and Climate Research Center, Columbus, OH, United States, (3)The Ohio State University, Department of Chemistry and Biochemistry, Columbus, OH, United States, (4)Carnagie Mellon University, Civil and Environmental Engineering, Pittsburgh, United States, (5)Carnagie Mellon University, Department of Chemistry, Pittsburgh, United States, (6)Carnegie Mellon University, Center for Atmospheric Particle Studies, Pittsburgh, PA, United States
Recorded Presentation
Abstract:
Single particle Inductively Coupled Plasma Mass Spectrometry (spICP-MS) (1,2) can measure the number of micro- and nanoparticles/mL and the mass of each detected element in each individual particle. If the particles are spherical and of known composition (e.g. engineered nanoparticles) particle diameters can also be estimated using spICP-MS.

The concepts, capabilities, limitations, and potential sources of error when using spICP-MS will be discussed. spICP-MS measures bursts of ions (0.2 to 1 ms in duration) produced in the plasma from individual micro- and nanoparticles. The number of bursts of ions detected is directly related to the number of particles per milliliter of sample. The number of ions of a particular element detected from each particle is directly related to the total number of atoms of that element in the particle. spICP-Quadrupole MS provides element selective detection of micro- and nanoparticles even when many particles with other elemental compositions are present. spICP-QMS continuously monitors the ICP-MS signal at one mass/charge with ≤0.1 ms time resolution allowing signal peaks derived from each burst of ions to be identified. spICP-Time of Flight MS provides a complete ICP-MS spectrum for each individual particle rather than just element specific detection.

The capabilities and some of the limitations of spICP-MS will be illustrated from measurements of engineered nanoparticles, and naturally occurring atmospheric micro- and nanoparticles entrapped in ice cores extracted from the Eastern Alps (Mt. Ortles) and East Antarctica (Taylor Glacier).

(1) C. Degueldre, P.Y. Favarger, Colloids Surf A Physicochem Eng Aspects 217(1/3), 137-142 (2003).

(2) M. D. Montaño, J. W. Olesik, A. G. Barber, K. Challis and J. F. Ranville 408, 5053-5074 (2016).

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