Particles, such as atmospheric dusts, suspension material or nanoparticles, play an important role for human health as well as in the global transport of substances. We determine the particle mass gravimetrically. The exact weighing is carried out in a climatic chamber (T: 21±1°C, relative humidity: 40%). In the case of filter samples, the particle size distribution is determined by optical microscopy in our laboratory or by partners at the DWD in Freiburg. For loose samples we use grading curves or for silty-clay samples an automated method based on the sedimentation rate.
We are happy to advise you on the right method for your problem.
Filter samples
|
Method |
Parameter |
Device |
|
Gravimetry |
Mass/quantity |
Satorius SE2-F ultra-microbalance Weighing range: Repeatability: |
|
Optical microscopy |
particle size, particle shape, particle type |
various microscopes |
Loose samples
|
Method |
Parameter |
Device |
|
Sieving |
Grain size composition, grading curves |
Various sieves from silt to gravel (40 µm - 2 cm) |
|
Sedimentation |
Direct particle size distribution of the silt fraction (2-63 µm); Calculation with grading curve enables calculation of the clay fraction |
Pario, METER-Group |