Date: Tue, 8 Jan 2008 08:58:22 -0500
Reply-To: "Young, Jennifer" <Jennifer.Young**At_Symbol_Here**TARGACEPT.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Young, Jennifer" <Jennifer.Young**At_Symbol_Here**TARGACEPT.COM>
Subject: Re: Vacuum Pumps for the roto-vaps
Comments: To: Russell Vernon
In-Reply-To: A<8BD786EE2CA681409315A8E4B7420BE613CA58**At_Symbol_Here**>

We've used diaphragm pumps for our rotovaps for the last 6 years. Very low maintenance, quite efficient, get a great vacuum. And you're not wasting tons of water (since we switched, our water bills have dropped 80%). Very good news here with the severe drought. We use the KNF pumps, but not sure of the model. We've had 2 fail as a result of what was being evaporated--very acidic materials that damaged the seals--but that was our fault for mis-using the equipment. We have at least 5 that have been going strong for the entire 6 years. Only real consideration is venting the exhaust, since some vapors don't get condensed, especially when the chemists forget to refill the cold finger. Best Regards, Jennifer A. Young, Ph.D. Environmental Safety Officer Targacept, Inc. 200 E. First St., Suite 300 Winston-Salem, NC 27101-4165 336 480-2182 336 480-2113 (fax) Jennifer.Young**At_Symbol_Here** -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Russell Vernon Sent: Monday, January 07, 2008 7:17 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: [DCHAS-L] Vacuum Pumps for the roto-vaps Have any of you had any experience with using a vacuum pump for a rotary evaporator instead of a water aspirator? I saw this site ( that advertized several products for this purpose (on the ACS Weekly Newsletter) and I am asking your opinions Thanks, -Russ Russell Vernon, Ph.D. UC System-wide Field Safety Working Group Chair Laboratory / Research Safety Specialist, Integrated Waste Manager and Interim Hazardous Materials Manager Environmental Health & Safety University of California, Riverside 900 University Ave. Riverside, CA 92521 russell.vernon**At_Symbol_Here** Direct: (951) 827-5119 Admin: (951) 827-5528 Fax: (951) 827-5122

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