입도분석, 영어

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입도분석

목차

1 Introduction

2 Measuring the Particle Size Distribution

3 Plotting the Particle Size Distribution

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1 Introduction
The particles in a colloidal suspension or emulsion are seldom all of the same size
and they often have varying shapes. Describing the size and shape is therefore a
significant problem. Emulsion droplets can usually be assumed to be spherical (so
long as the distances between the droplets is large enough).
For solid particles we often have to make do with general descriptions of shape like
spheroidal, rod- or disk-shaped, even when the system contains individual particles
with other shapes.
The particle size may also vary over quite a wide range. It is not unusual for the
particles of a suspension produced in a grinding operation, for example, to vary by a
factor of 100 from the smallest to the largest size. To describe such situations we
normally break the range up into a number of classes and try to find out how many
particles are in each size range.
This range is called the particle size distribution (PSD), and it can be represented in
the form of a Table or a histogram (see Figure 1).

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