Application Area & Technique

Whitehouse Scientific

Particle Size and Sieve Standards from Whitehouse Scientific

With an experience of over 25 years, Whitehouse scientific is Europes highest ranking certification laboratory for primary methods of particle size analysis. Sigma- Aldrich offers a wide range of polydisperse particle size standards and sieve calibration standards from Whitehouse scientific.



Certified Polydisperse Particle Size Standards

These NIST and NPL traceable standards were commissioned by the Bureau of Certified References (BCR) and are measured by a large international team including the 20 top laboratories in the field of particle size. For the certification of the glass particles, several unambiguous primary methods such as microscopy, sieving, sedimentation and Coulter counter were used.

The standards are delivered in Sets of 10 vials in quantities suitable for any method of analysis without further subdivision.

Table 1. Polydisperse Particle Size Standards from Whitehouse Scientific

Cat. No. Product Name Pack size Add to Cart
51358 Polydisperse Particle Standard  0.1 - 1 µm 10 x 0.02 g
42459 Polydisperse Particle Standard    1 - 10 µm 10 x 0.1 g
05724 Polydisperse Particle Standard    3 - 30 µm 10 x 0.05 g
94078 Polydisperse Particle Standard    3 - 30 µm 10 x 0.1 g
80847 Polydisperse Particle Standard  10 - 100 µm 10 x 0.25 g
40579 Polydisperse Particle Standard  10 - 100 µm 10 x 0.5 g
08718 Polydisperse Particle Standard  10 - 100 µm 10 x 1 g
57563 Polydisperse Particle Standard  50 - 350 µm 10 x 0.5 g
78456 Polydisperse Particle Standard  50 - 350 µm 10 x 2.5 g
94773 Polydisperse Particle Standard 150 - 650 µm 10 x 2.5g



Certified Sieve Calibration Standards

The Sive Calibration Standards from Whitehouse Scientific offer a unique method of calibrating sieves with traceability to NIST and NPL. The glass microspheres are delivered in sets of single shot bottles in order to eliminate operator sampling errors.
The calibration requires only about 2 minutes following a simple procedure: The glass microspheres are placed into the sieve which is shaken either manually or mechanically, until an equilibrium has reached and no more particles pass the sieve.


Figure 1: Calibration graph for the 63µm sieve standard

By weighing the sieve and the single shot bottle before and after the equilibration, the percentage of microspheres passing the sieve can be calculated and the mean aperture size of the sieve can thus be determined using the calibration graph supplied with the test certificate. Figure 1 shows an example of a calibration graph for the 63µm sieve standard.

Table 2. Sieve Calibration Standards from Whitehouse Scientific

Cat. No. Product Name Mesh # Calibration Range Pack size Add to Cart
12655 Sieve Standard 45 µm 325 42.0 - 50.8 5 x 1.0 g
49500 Sieve Standard 63 µm 230 56.6 - 70.4 5 x 1.0 g
42696 Sieve Standard 75 µm 200 67.1 - 82.8 5 x 1.0 g
61847 Sieve Standard 106 µm 140 91.4 - 117 5 x 1.0 g
18867 Sieve Standard 125 µm 120 112 - 139 5 x 1.0 g
75446 Sieve Standard 150 µm 100 134 - 167 5 x 1.5 g
43390 Sieve Standard 180 µm 80 161 - 199 5 x 1.5 g
41544 Sieve Standard 250 µm 60 226 - 281 5 x 2.5 g
67246 Sieve Standard 300 µm 50 270 - 333 5 x 2.5 g
78900 Sieve Standard 500 µm 35 440 - 557 5 x 2.5 g