Hello Jerry & All,
For the *sake of discussion* lets say could be done'
perhaps the below statement by Jerry gives clues to why the chemical people 
would object *if* (for the sake of discussion) could be accomplished.

Jerry said:
> For chemical analysis, sample size is a critical issue that  affects
> detection limits.  In general, the smaller the sample, the  less likely 
> the
> instrument will see anything other than a relatively high amount  of a 
> given
> chemical or category of chemicals.


Maybe I misunderstood the researcher?
interesting discussion.

bob 

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