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Particle Size DistributionThe properties of certain products are dependent on the dimension or the surface of the particles that they are composed of. The choice of instrument (or combination of equipment) should take into consideration the following criteria:
- First - what is the measuring range required (minimum and maximum size of particle)
- Precision required (determines method of analysis)
- Quantity of sample to be analysed
- Time of analysis (number of samples to be analysed daily)
- Media in which sample can be analysed (dry or in liquid)
Different Methods:
A sieve shaker is the most widely used method for analysis of aggregate or particles larger than 50 µm. In some cases, sieves can be used for fine particle analysis (down to 5µm). However, this method of analysis requires a relatively long time for analysis (5 to 30 min.)
Particle Size Analyzer Particle size analyzers are the fastest (approx. 10 sec.) and most precise method of analysis. This method is chosen in cases of fine to very fine particle sizes where a large number of analyses are needed. When used in combination with sieving analysis, all measuring ranges are possible.
Particle Size Analysers
|
Measuring Range |
Method |
Lab Instrument |
Sample Quantity |
Analysis Time |
Media |
|
Minimum |
Maximum |
|
0.01µm |
2000µm |
Laser Diffraction |
Analysette 22 NANO TEC Particle Size Analyzer |
0.1 to 50 cm3 |
10 sec. |
Liquid / Dry |
|
0.08µm |
2000µm |
Laser Diffraction |
Analysette 22 MICRO TEC Plus Particle Size Analysis |
0.1 to 50 cm3 |
10 sec. |
Liquid / Dry |
Particle Shape Analysis Software available for the NanoTec liquid dispersion model. |
Liquid |
Sieve Shakers
|
Measuring Range |
Method |
Lab Instrument |
Sample Quantity |
Analysis Time |
Media |
|
Minimum |
Maximum |
| 3.0µm |
5.6mm |
Sieving |
L3P Sonic Sifter Separator |
10gr |
1 to 5 min. |
Micro Dry |
| 5.0µm |
100µm (140 mesh) |
Sieving |
Analysette 3 MICRO A-3 Pro Micro-sieving option |
200mg |
30 to 60 min. |
Liquid |
| 5.0µm |
5.60mm (3-½") |
Sieving |
Sonic Sieve Shaker |
Up to 50gr |
5 min. |
Dry |
20µm (635 mesh) |
25mm (1") |
Sieving |
Analysette 3 PRO Microprocessor Sieve Shaker |
10gr to 5kg |
10 to 30 min. |
Dry / Liquid |
20µm (635 mesh) |
25mm (1") |
Sieving |
Analysette 3 SPARTAN Digital Sieve Shaker |
10gr to 5kg |
10 to 30 min. |
Dry / Liquid |
45µm (325 mesh) |
25mm (1") |
Sieving |
Tyler Ro-Tap Sieve Shaker, ASTM |
10gr to 5kg |
10 to 30 min. |
Dry |
63µm (230 mesh) |
125mm (4") |
Sieving |
Analysette 18 Vibratory Sieve Shaker |
6kg to 17kg |
5 to 30 min. |
Dry |
75µm (200 mesh) |
50mm (2") |
Sieving |
Porta-Screen |
30kg |
10 to 30 min. |
Dry |
75µm (200 mesh) |
125mm (5") |
Sieving |
Testing Screen and Test-Master |
50kg |
10 to 30 min. |
Dry |
20µm (635 mesh) |
100mm (4") |
Sieving |
Analytical Test Sieves ASTM, ISO Test Sieve |
Tyler in 3", 8", 200mm, 12" diameter and special sizes |
March
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