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Electrozone Sensing in Particle Size Analysis

Particle Size Analysis

  1. M. Margarida Figueiredo

Published Online: 15 SEP 2006

DOI: 10.1002/9780470027318.a1504

Encyclopedia of Analytical Chemistry

Encyclopedia of Analytical Chemistry

How to Cite

Figueiredo, M. M. 2006. Electrozone Sensing in Particle Size Analysis. Encyclopedia of Analytical Chemistry. .

Author Information

  1. Coimbra University, Portugal

Publication History

  1. Published Online: 15 SEP 2006


Particle sizing is a rapidly growing field, not only because of its importance in a great variety of technological applications but also due to its outstanding relevance to numerous areas of scientific research.

The currently available instruments to measure particle-size distributions are many and varied, the results often being dependent on the measuring technique used. It is thus essential to understand the physical principles behind each technique in order to make an adequate choice.

Electrozone sensing, a widely used method of particle-size analysis, constitutes the main topic of this paper. A general description of its operating principle is provided, followed by some practical considerations mainly concerning sample preparation and the selection of electrolyte solutions and aperture tubes. Being a technique that requires prior calibration, emphasis is placed on the calibration procedures. The section dedicated to the measurement of special materials also reviews some recent improvements of this technique. Finally, a list of commercially available equipment is supplied, together with its most relevant features.