תיאור
Areas of application
Well suited for sample preparation, such as in chemical analysis, chromatography, mass spectrography or x-ray structure analysis. Preparation of samples in genetic research, homogenisation of ingredients, preparation of extracts in forensic analysis, grinding of pigments and precious materials.
The PULVERISETTE 23 is also excellently suited for solubilising of biological samples and for low temperature comminution of frozen or chilled soft samples.
Method of operation
The rotation of a large direct current motor is converted into vertical oscillation movement via a lifting piston gear. Through oscillations of the grinding bowl of large amplitude and high frequency, comminution occurs in the grinding bowls due to the collision between grinding balls and the grinding bowl inner wall as well as through friction between the grinding balls and the grinding bowl inner wall.
In contrast to comparable mills, the ball-shaped grinding bowl inner wall is optimised for the comminution principle and achieves a significantly higher level of efficiency.
| Operating principle: | Impact force |
| Grinding tools: | Grinding bowls and grinding balls |
| Grinding bowl sizes: | 5, 10, 15 ml |
| Grinding ball diameter: | 0.1 – 15 mm |
| Materials of the grinding tools: | Zirconium oxide, stainless steel, hardened steel, PTFE |
| Max. feed size: (depending on material): | 6 mm |
| Min. sample quantity: | 0.1 ml |
| Max. sample quantity: | 5 ml |
| Final fineness: (depending on material): | 5 µm |
| Typical grinding time: (depending on the material): | 2 min |
| Cryogenic grinding: | Liquid nitrogen can be used for pre-cooling in the PTFE bowl |
| Grinding process: | Dry/wet |
| Grinding bowl oscillations per minute: | 900 – 3000 at 9 mm amplitude |
| Electrical details: | 100-240 V/1~, 50-60 Hz, 90 watt |
| Weight: | 7 kg |
| Dimensions: (w x d x h) | Bench top instrument 20 x 30 x 30 cm |
