Sample Preparation, a Prerequisite for Reliable Results
Samples with Volatile Components
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For the size reduction of many materials it is more suitable to use a cryogenic mill than a laboratory mill which operates at room temperature. The sample is embrittled by liquid nitrogen which improves its breaking behavior when submitted to impact, pressure and friction; moreover, volatile components of the sample are preserved.
Screw-top Grinding Jars
Due to the wide range of accessories the CryoMill (fig.1) by Retsch can be used for a large variety of applications. The screw-top grinding jars of hardened steel and stainless steel have been specifically designed. The fact that no sample material can escape makes them particularly safe. They are available with volumes of 5 ml, 25 ml, 35 ml and 50 ml. For applications where steel jars cannot be used due to possible sample contamination, a 25 ml grinding jar of PTFE and matching grinding balls are available.
Various adapters make the mill a versatile instrument. If only very small sample amounts need to be processed, an adapter for 2 respectively 4 grinding jars of 5 ml is recommendable. It is also possible to use 2 ml reaction vials using another adapter which can hold up to 4 tubes.
For safe and comfortable operation, the unit is equipped with an autofill with a 50 l liquid nitrogen container (for up to 20-30 samples). It is also possible to connect existing cryo tanks to the mill. For such applications, a connection tube with safety valve is available.
Read more on the application of the CryoMill by the Cottbus University.