About This Archive  | DCHAS-L 2020 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Re: [DCHAS-L] Doing our small part - we've opened a small testing lab
Date: Thursday, April 23, 2020 at 10:25:07 AM
Author: Yaritza Brinker <YBrinker**At_Symbol_Here**FELE.COM> 		Next by Date:
Subject: [DCHAS-L] Prudent Practices Round Table
Date: Thu, 23 Apr 2020 16:11:24 -0400
Author: James Kaufman

From: TILAK CHANDRA <0000058f112ac338-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Schlenk Line Survival Guide
Date: Thu, 23 Apr 2020 19:44:04 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CH2PR06MB661441C549CA8F80305670EE88D30**At_Symbol_Here**CH2PR06MB6614.namprd06.prod.outlook.com
In-Reply-To <0f67acc4-efbd-1780-42be-98274e6dd069**At_Symbol_Here**well.com>



Practically, we need to use flexible tubing for the Schlenk line manipulations; so, we can insert the tubing to the Schlenk line ports and Schlenk flask adapter without exerting any pressure. Also, we should be able to rotate the flasks around, a thick and hard tubing will limit the movement and may exert a lot of strain on Schlenk line ports.


For maximum chemical manipulations flexible rubber tubing works very well. We need to be only careful when manipulating highly-air sensitive compounds such as iron-sulfur cluster, otherwise rubber tubing should be fine..

 Tilak


From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of davivid <davivid**At_Symbol_Here**WELL.COM>
Sent: Wednesday, April 22, 2020 2:32 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] Schlenk Line Survival Guide
 
One thing to remember when using Schlenk lines or other vacuum apparatus
is that commonly used Tygon (or other vinyl) tubing is somewhat air
permeable. I have seen a rise of several tens of mtorr in the ultimate
vacuum of a system when a ~1 foot section of 1/4" ID x 1/2" OD Tygon
line was added via well clamped hose barbs. Tubing specified for vacuum
use has much thicker walls but is much stiffer and more difficult to
manipulate and places more force on the glassware when bent.

Best regards
Dave Lane
Principal
Clavis Technology Development

---
For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org
Follow us on Twitter **At_Symbol_Here**acsdchas

Previous post   |  Top of Page   |   Next post


The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.