Keywords: Particle size distribution, Inversion matrix, Ambient particles, Fractal dimension, Fast Mobility Particle SizerĮver since the algorithm for the Scanning Mobility Particle Sizer (SMPS) was first introduced by Wang and Flagan (1990), it has served as a standard for particle mobility size distribution measurement. Challenges remain for FMPS measurements when particle morphologies are not known a priori or when they are different from near spherical shape or aggregate structure. This study showed that the soot and compact matrices are insufficient for ambient aerosol measurement. This is likely due to the restructuring of soot during the removal of volatile coating. Measurement of the non-volatile fraction of ambient aerosol downstream of a catalytic stripper showed that the FMPS-compact matrix agreed best with the SMPS with the FMPS over SMPS linear regression slope of 0.99–1.00 for particle concentrations. All FMPS inversion matrices showed size-dependent discrepancies compared with the SMPS. The FMPS-compact matrix also showed the best agreement with the SMPS for mode diameter. The FMPS-compact matrix showed the best agreement with SMPS for particle concentration in the size ranges of 9–359 nm and 9–100 nm (for ultrafine particles). Highlight the need for ambient aerosol FMPS matrices.įast Mobility Particle Sizer (FMPS) size distribution measurements with different inversion matrices were compared with the Scanning Mobility Particle Sizer (SMPS) for ambient aerosols sampled from a background location in Riverside, CA in this study.Compare the FMPS soot and compact matrices with Zimmerman’s empirical correction method.Evaluate the performance of soot and compact matrices of TSI FMPS for ambient aerosol.Evaluation of Fast Mobility Particle Sizer (FMPS) for Ambient Aerosol Measurement. Sample concentrations from 0.Lin, Y, Pham, L., Wang, X., Bahreini, R., Jung, H.S.Min sample volume: 12 µL (1 ml for standard sample holders).Dry or wet dispersion accessories: integrated dry powder sample dispersion unit (SDU) 4-slide plate glass wet cell 25 mm filter plate.Multiple optical objectives: 2.5x, 5x, 10x, 20x, 50x.Sample dispersion accessories: Hydro MV (~120 mL wet cell), Hydro LV (~600 mL wet cell, AeroS (dry dispersion).Blue (LED, 470nm) and Red (He-Ne laser, 632.8nm).12mm OD square polystyrene cuvette for aqueous solvents and glass cuvette for non-aqueous solvents.Temperature controlled range: 0☌ - 90☌ +/-0.1.High resolution & detailed, statistically representative.The summary of instrument characteristics is presented in the following table: The most commonly used are number-weighted, volume-weighted and intensity weighted distributions (See Fig. The weighting mechanism will depend upon the measuring principle/technique being used. Particle size distribution can be represented in different ways with respect to the weighting of individual particles. In addition to particle size, Morphologi, a static microscope-based automated imaging system, provides information on particle shape as well. All these instruments have the ability to measure and report particle size distribution of a sample.
0 kommentar(er)
