Laser-induced breakdown spectroscopy for sizing and elemental analysis of discrete aerosol particles

The laser-induced breakdown spectroscopy technique has been extended to provide quantitative analysis of the mass and elemental composition of individual, submicrometer to micrometer-sized aerosol particles. A two-part approach was used for calibration of the overall mass concentration response, and of the characteristic plasma volume, equal to 2.5 x 10(-4) cm(3). Laboratory results are presented for submicrometer-sized particles containing a known concentration of magnetite. Additional data are presented for fine particulate matter measured in ambient air, including: magnesium-containing particles with an average size of 313 nm. (C) 1998 American Institute of Physics.