figure 7
|
NUMBER DISTRIBUTION
figure 8
|
VOLUME DISTRIBUTION
figure 6
|
PARTICLES
1, 2 AND 3µm IN SIZE
Calculations show percent by
volume and number for each size
range.
D = 1µm
VOLUME = 0.52µm
% BY VOLUME = 0.52/18.8 = 2.8%
D = 2µm
VOLUME = 4.2µm
% BY VOLUME = 4.2/18.8 = 22%
D = 3µm
VOLUME = 14.1µm
% BY VOLUME = 14.1/18.8 = 75%
TOTAL VOLUME
0.52 + 4.2 + 14.1 = 18.8µm
8
Interpreting results of a particle size measurement requires an under-
standing of which technique was used and the basis of the calculations.
Each technique generates a different result since each measures different
physical properties of the sample. Once the physical
property is measured a
calculation of some type generates a representation of a particle size distribution.
Some techniques report only a central point and spread of the distribution, others
provide greater detail across the upper and lower particle size detected. The particle
size distribution can be calculated based on several models:
most often as a number
or volume/mass distribution.
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