PHARMACEUTICALS AND MEDICINE
The smallest instrument for smallest quantities
The ultra-compact FRITSCH Mini-Mill is ideal for fine comminution of smallest quantities of medium-hard, brittle and moist samples – wet, dry or cryogenic. Its special spherical grinding bowl ensures a much better performance in grinding, mixing and homogenizing compared with similar models. With a footprint of just 20 x 30 cm and a weight of 7 kg it easily fits anywhere; it’s smart, user-friendly, inexpensive and convinces with impressive results, small, fast, effective.
|Working principle||impact force|
|Optimal for material type||medium-hard, brittle, moist|
|Grinding tools||grinding bowls and grinding balls|
|Materials of the grinding tools||zirconium oxide, hardened stainless steel, PTFE|
|Grinding bowl sizes||5, 10, 15 ml|
|Grinding ball diameter||0.1 – 15 mm|
|Max. feed size (depends on material)||6 mm|
|Min. sample quantity||0.1 ml|
|Max. sample quantity||5 ml|
|Final fineness (depends on material)||5 µm|
|Grinding time (depends on material)||2 min|
|Grinding process||dry / wet|
|Cryogenic grinding||liquid nitrogen can be used for pre-cooling in the PTFE bowl|
|Grinding bowl oscillations per minute||900 – 3,000 at 9 mm amplitude|
|Electrical details||100-240 V/1~, 50-60 Hz, 20 Watt|
|Emission sound pressure level at the workplace according to DIN EN ISO 3746 (depending on the material to be ground and grinding bowl/balls used)||approx. LpAd = 75 dB|
|Dimensions (W x D x H)||bench top instrument 20 x 30 x 30 cm|
Impact and friction
The FRITSCH Mini-Mill PULVERISETTE 23 grinds the sample through impact and friction between grinding balls and the inside wall of the grinding bowl. For this, the grinding bowl performs vertically oscillating movements with 900 – 3,000 oscillations per minute at 9 mm amplitude.
In contrast to similar mills, a clearly better degree of efficiency is achieved due to the spherical-shaped inside of the grinding bowl, which is perfectly adapted to the communition principle.
Unmatched effectiveness with spherical grinding bowls
Available only from FRITSCH: In Special consideration of the ball mill grinding concept, we developed for the PULVERISETTE 23 a grinding bowl with interior walls that are spherical instead of cylindrical. Your advantage: Unmatched grinding performance with a significantly improved grinding effect, much easier recovery and simpler cleaning.
Especially practical: The spherical grinding bowls of the PULVERISETTE 23 are assembled simply and quickly, just twist and turn!
The 5 ml PTFE bowl is especially suited for using the FRITSCH PULVERISETTE 23 in biotechnology applications. For example, it is possible to break up fungus or yeast cells, deep frozen tissue and cells in only a few minutes with this special plastic bowl and a 10 mm steel ball. It is also possible to pre-cool the entire bowl in liquid nitrogen.
Grinding bowl and grinding balls
The Mini-Mill PULVERISETTE 23 operates with a grinding bowl and grinding balls. To avoid undesired contamination of the sample through abrasion, we offer a selection of 3 different materials. Normally, grinding bowls and grinding balls of the same material are used. Grinding bowls and grinding balls made of zirconium oxide for absolute metal-free grinding are also offered.