The "pulverisette 14", from Fritsch GmbH, is the all-purpose mill for rapid crushing of medium-hard (like for example drugs, dragées, tablets) to soft substances (like for exam-ple plants, roots, leaves, needles, spices, chemi-cals, foodstuffs). It can also be used to disperse and homogenise dry samples.
Grinding temperature-sensitive materials is also possible with the variable speed rotor mill. The ex-tremely high rotor speed enables fast and effective grinding, drastically reducing thermal stress on the grinding material.
Samples that are difficult to grind can be ground to analytical fineness by embrittlement (e.g. addition of liquid nitrogen before grinding). Under some cir-cumstances, the high efficiency of the mill can make it possible to grind such samples even with-out previous embrittlement.
The "pulverisette 14" can be fitted with a pin insert in order to grind medium-hard samples and materi-als containing oil or grease without a sieve. By inserting an impact rotor with impact blades in the sieve ring, hard to medium-hard samples can be crushed easily through the increased shearing effect.
With a feed particle size of
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