Date: Fri, 8 Oct 2010 23:06:23 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
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From: ILPI <info**At_Symbol_Here**ILPI.COM>
Subject: Re: Science Education & Safety
In-Reply-To: <00c301cb6722$23f07020$6bd15060$**At_Symbol_Here**vernon**At_Symbol_Here**>

Ethyl acetate is the general replacement in that classic laboratory experiment.  Requires approximately 4x more solvent, however.  Google this: caffeine extraction "ethyl acetate"

Caffeine from tea or coffee is an excellent experiment to demonstrate supercritical CO2 extraction, but I expect the instructor is trying to demonstrate classic two-phase extractions.

Rob Toreki

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On Oct 8, 2010, at 3:51 PM, Russell Vernon wrote:

I found out today that one of our teaching labs is conducted an extraction experiment with dichloromethane (caffeine from coffee)
I would like to provide them a reasonable alternative extraction experiment with an occupationally regulated carcinogen=85
If you have a recommendation to look at, would you please contact me?
Russell Vernon, Ph.D.
Research Safety
Environmental Health & Safety
University of California, Riverside
900 University Ave
Riverside, CA 92521
Direct (951) 827-5119
Admin (951) 827-5528
Fax (951) 827-5122

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