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Rapid Analysis of the Size Distribution of Metal-Containing Aerosol.


ABSTRACT: Conventional methods to measure the metallic content of particles by size are time consuming and expensive, requiring collection of particles with a cascade impactor and subsequent metals analysis by inductively coupled plasma mass spectrometry (ICP-MS). In this work, we describe a rapid way to measure the size distribution of metal-containing particles from 10 nm to 20 ?m, using a nano micro-orifice uniform-deposit impactor (nano-MOUDI) to size-selective and collect particles that are then analyzed with a field portable X-ray fluorescence (FP-XRF) to determine metal composition and concentration. The nano-MOUDI was used to sample a stainless-steel aerosol produced by a spark discharge system. The particle-laden substrates were then analyzed directly with FP-XRF and then with ICP-MS. Results from FP-XRF were linearly correlated with results from ICP-MS (R2 = 0.91 for Fe and R2 = 0.84 for Cr). Although the FP-XRF was unable to detect Fe particles at mass per substrate loadings less than 2.5 ?g effectively, it produced results similar to those using the ICP-MS at a mass per substrate loading greater than 2.5 ?g.

SUBMITTER: Park JH 

PROVIDER: S-EPMC5580826 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Rapid Analysis of the Size Distribution of Metal-Containing Aerosol.

Park Jae Hong JH   Mudunkotuwa Imali A IA   Crawford Kathryn J KJ   Anthony T Renée TR   Grassian Vicki H VH   Peters Thomas M TM  

Aerosol science and technology : the journal of the American Association for Aerosol Research 20161020 1


Conventional methods to measure the metallic content of particles by size are time consuming and expensive, requiring collection of particles with a cascade impactor and subsequent metals analysis by inductively coupled plasma mass spectrometry (ICP-MS). In this work, we describe a rapid way to measure the size distribution of metal-containing particles from 10 nm to 20 μm, using a nano micro-orifice uniform-deposit impactor (nano-MOUDI) to size-selective and collect particles that are then anal  ...[more]

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