Basic Principles of Particle Size Analysis
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چکیده
Imagine that I give you a matchbox and a ruler and ask you to tell me the size of it. You may reply saying that the matchbox is 20 x 10 x 5mm. You cannot correctly say "the matchbox is 20mm" as this is only one aspect of its size. So it is not possible for you to describe the 3-dimensional matchbox with one unique number. Obviously the situation is more difficult for a complex shape like a grain of sand or a pigment particle in a can of paint. If I am a Q.A. Manager, I will want one number only to describe my particles – I will need to know if the average size has increased or decreased since the last production run, for example. This is the basic problem of particle size analysis – how do we describe a 3-dimensional object with one number only?
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