SediTest™ - Particle suspensions in the size range 100 nm - 1000 nm:

• Spherical silica microparticles with excellent dimensional stability and narrow size dispersion for use as sedimentation and particle size standard for optical sedimentation analyzers (e.g. LUMiFuge^®, LUMiSizer^®)

• Monomodal suspensions with the nominal particle diameters: 170 nm, 250 nm, 550 nm and 1000 nm are available.

Particle size distributions of submicron silica particles, 
Sedimentation analysis using LUMiSizer^® (2 mm cells, λ=470 nm, T=25°C, 500-4000 U/min) 

SediTest™ - Particle suspensions in the size range 15 μm - 40 μm:

• Spherical microparticles of cross-linked PMMA with excellent dimensional stability and narrow size dispersion for use as sedimentation and particle size standard for optical sedimentation analyzers (e.g. LUMiReader®)

• There are monomodal suspensions with the nominal particle diameters: 15μm, 20μm, 29μm and 38μm available.

Particle size distributions of PMMA microparticles, 
Sedimentation analysis using LUMiReader^® PSA (10mm cells, λ=870 nm, T=30°C)

The monomodal particle suspensions can be used advantageously for validation and qualification of high resolution particle sizers such as e.g. LUMiFuge^®, LUMiSizer^® or LUMiReader^®-PSA  (LUM GmbH).  They cover a wide particle size range and, due to their defined size grading and particle size distribution, allow the user to test resolution and accuracy of the analytical method.

Of course, SediTest™ is also suitable for use in other devices.

The use of SediTest™ with LUMiSizer^® or LUMiReader^®-PSA doesn'nt require special sample preparation; the suspension only needs to be briefly redispersed. All required information can be found in the enclosed instructions for use.

SediTest™-Particle suspensions are supplied with a particle size certificate.