grinding PE granule and determination addetives

Discussions about sample preparation: extraction, cleanup, derivatization, etc.

5 posts Page 1 of 1
Hi
I have to grinding PE granule and determination the additives in the powder of the granule by HPLC.
we have this instrument:
knife mill grindomix GM 200

but it is not suitable for granule (hard material), i wanted to know if i could made some change in the cutter of knife mill to make it more suitable for granule?
and also i will be grateful if you would write to me another solution.
thanks
By "PE," do you mean polyethylene?

Polyethylene is very soft, and it is difficult to imagine circumstances under which a mill with a steel blade could conceivably be damaged by polyethylene, unless the blade was physically prevented from moving by overwhelming amounts of polyethylene.

Polyethylene is very soft, and it may respond better to milling if it is mixed with dry ice or liquid nitrogen in order to make it more brittle and friable.
osp001 wrote:
By "PE," do you mean polyethylene?

Polyethylene is very soft, and it is difficult to imagine circumstances under which a mill with a steel blade could conceivably be damaged by polyethylene, unless the blade was physically prevented from moving by overwhelming amounts of polyethylene.

Polyethylene is very soft, and it may respond better to milling if it is mixed with dry ice or liquid nitrogen in order to make it more brittle and friable.

we used liquid nitrogen before milling polyethylene, but unfortunately the blade was damage. Do you think it's better to change the blade? But with what do I change it?
I'm not sure how you managed to damage a steel blade with polyethylene, but you should contact the manufacturer of the mill to see what they recommend.

If you have a jar mill, that would probably be the next best thing to try- or a vibratory mill with ceramic beads.
osp001 wrote:
I'm not sure how you managed to damage a steel blade with polyethylene, but you should contact the manufacturer of the mill to see what they recommend.

If you have a jar mill, that would probably be the next best thing to try- or a vibratory mill with ceramic beads.

Thanks a million....
5 posts Page 1 of 1

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