Re: Gum analysis

Schuyler Grace wrote:
>
> Katharine,
>
> I'm assuming he's also analyzing a control sample of gum that has never been
> "adulterated" to ensure there wasn't any Cr contamination in the original
> gum, or if there was, how great it was?

Yes, he is checking a sample of raw gum along with the crosslinked gum.
kt

>
> -Schuyler
>
> -----Original Message-----
> From: Katharine Thayer [mailto:kthayer@pacifier.com]
> Sent: Friday, October 15, 2004 6:02 AM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Gum analysis
>
> I wrote all the above on Sept 28; since then the chemist has thoroughly
> combusted the practice sample, ensuring first that all the material
> stays in the crucible during combusion. He weighed the resulting ash,
> and has done some initial analyses and determined that he wants to
> adjust the furnace temperature higher since he got some irrelevant
> inorganics in the ash that would be burned off with a higher temperature
> and make for a cleaner analysis. (I hope I'm not putting words in his
> mouth; that's not exactly what he said but it's the impression I got
> from what he said.)
>
> At any rate, all of this is preliminary, there aren't any actual results
> to report yet, but I thought it might be interesting for non-scientists
> to see some of the process that scientists go through to set up an
> experiment.
>
> Hope that answers your question,
> Katharine
Received on Fri Oct 15 18:56:33 2004