On the determination of log-normal particle-size distributions using half widths and detectabilities of scattered laser power spectra

1978 ◽  
Vol 20 (5) ◽  
pp. 447-460 ◽  
Author(s):  
S.S. Penner ◽  
P. Chang
Keyword(s):  
Particle Size ◽  
Laser Power ◽  
Power Spectra ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Normal Particle ◽  
Log Normal

DETERMINATION OF ELEMENT CONCENTRATION AND PARTICLE SIZE DISTRIBUTION IN BEIJING URBAN ATMOSPHERIC AEROSOL

1992 ◽  
Vol 02 (04) ◽  
pp. 637-644 ◽  
Author(s):  
GUANGHUA ZHU ◽  
XINFU WANG ◽  
XINYIN SHEN
Keyword(s):  
Particle Size ◽  
Atmospheric Aerosol ◽  
Element Concentration ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Retention Models ◽  
Elemental Concentrations ◽  
Log Normal ◽  
Least Squares Minimization

The atmospheric aerosol samples are collected in Beijing using a ten-stage cascade impactor sampler, and the elemental concentrations are analyzed by the PIXE analytical method. The parameters of particle size distributions are determined by the use of log-normal plots and the least-squares minimization. From these parameters the total amount of deposit in a day at the naso-pharyngeal, tracheo-bronchial and pulmonary are evaluated based on the deposition and retention models.

Maximum-entropy method as a routine tool for determination of particle size distributions by small-angle scattering

2004 ◽  
Vol 37 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Dragomir Tatchev ◽  
Rainer Kranold
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Small Angle ◽  
Maximum Entropy Method ◽  
Entropy Method ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Angle Scattering ◽  
The Fourier Transform

Several aspects of the application of the maximum-entropy method (MEM) to the determination of particle size distributions by small-angle scattering (SAS) are discussed. The `historic' version of the MEM produces completely satisfying results. Limiting the data error from below (i.e.imposing a minimal relative error) is proposed as a solution of some convergence problems. The MEM is tested against the Fourier transform technique. The size distribution of Pb particles in an Al–Pb alloy is determined by the MEM and the Fourier transform technique. The size distributions obtained by transmission electron microscopy (TEM) and SAXS show partial agreement.

Determination of Particle Size Distribution of Nano-TiO2 Coating Film by AFM and Image Analysis

2010 ◽  
Vol 177 ◽  
pp. 22-24
Author(s):  
Zheng Min Li ◽  
Zhi Wei Chen ◽  
Min Tan ◽  
Ke Jing Xu ◽  
Bing Jiang
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Coating Film ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Nano Tio2 ◽  
Tio2 Particles ◽  
Atom Force Microscope

Nano-TiO2 coating film is one of the efficient photocatalysts. The particle size distribution of TiO2 has important influence on photocatalytic activity. A new method to determine the particle size distribution of TiO2 nano-film coated on ceramic was developed, by which the images of film acquired by Atom force microscope (AFM) were processed, and TiO2 particles contacted with others were separated and detected. The particle size distributions of two TiO2 nano-films were determined.

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