On 5 Sep 2001, at 10:59, John Cliff wrote:

> We were thinking of grinding fruit using  Liquid N2 for 15N analysis.  I
> don't see any problems with this, but  thought I'd ask.  Anybody have any
> negative experiences with this?

I used to use LN2 for macroalgae, tough as old boots, and went
through a number of pestle and morters.

Prechilling helped but not completely!

Aj


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