Popcorn

The desired cutting mill could be used, but for only 30 grams of popcorn, we recommend using a Knife Mill PULVERISETTE 11. No static knife is present to shear off particles, but surely also our sickled knife with serrated blades should be capable to achieve the desired fineness of 90 % < 2 mm, too.

The desired amount of sample filled our standard vessel by 2/3. We used a SOP which was comminuting the sample for 5 seconds at maximum speed of 10.000 rpm. After 10 seconds, the sample volume collapsed, but still a few fragments up to 7 mm length were observed. After finally 20 seconds of total grinding time, the majority of sample was ground < 2 mm as desired. Some fine sample stayed attached to the lid and vessel by electrostatic charge.

At this time, no smearing of fine ground sample was observed yet; a longer dry grinding should still be possible if required. The grinding equipment was cleaned rapidly by flushing with fresh water.