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Subject: Re: Paraoxone?
Date: Mon, 25 Oct 2010 09:00:46 -0600
Author: Wendy Campbell
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Subject: Re: Lab safety showers
Date: Tue, 26 Oct 2010 07:50:02 -0700
Author: Gordon Kroemer
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Date: Mon, 25 Oct 2010 14:56:35 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "CHEATOM, WAKEELAH" <wcheatom**At_Symbol_Here**UMFLINT.EDU>
Subject: Re: attaching tubing to glass
I would have to agree. In the laboratory I work for, I use the method
that David has stated below and it works well when removing the tubing
from the glass. Especially when the glassware if very expensive.
Wakeelah Cheatom
Analyst, QC Product Testing (Analytical Chemistry)
BioDefense Operations - Lansing, MI
Emergent BioSolutions
3500 N. Martin Luther King Jr. Blvd.
Lansing, MI 48906-9910
t 517 327-5022
f 517 327-1681
e CheatomW**At_Symbol_Here**ebsi.com
www.emergentbiosolutions.com
________________________________
From: DCHAS-L Discussion List on behalf of DAVID KATZ
Sent: Mon 10/25/2010 9:34 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] attaching tubing to glass
Depending on the size of the glass tube and the i.d. of the Tygon
tubing, the tubing may slide off of the glass during use if vacuum
grease has been applied. It is usually a good idea to use a hose
clamp to secure the tubing in these cases.
No matter how the Tygon tubing was attached to the glass tube, whether
it has been by warming it to soften it or using water to allow it to
slide onto the tube, there is the problem of removing the Tygon tubing
from the glass tube at the end of the procedure. That's where most
accidents, that I have observed, have happened. I normally recommend
cutting off the Tygon tubing near the Tygon-to-glass connection
leaving a small length of tubing attached to the glass. Then remove
the piece of Tygon from the glass by placing it on a solid surface,
protecting hands with gloves, and carefully cutting the Tygon tube in
a diagonal cut so it can be safely removed.
In our academic lab, I have not been successful in convincing some
instructors to use the "old fashioned" rubber tubing when connecting
water jacketed condensers to water supplies. We tend to lose
condensers when students try to remove the Tygon tubing from the water
inlets. Luckily, the number of personal injuries have been very
small.
David
______________________________________________________________________
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David A. Katz
Chemist, Educator, Expert Demonstrator, Science Communicator, and
Consultant
Programs and workshops for teachers, schools, museums, and the
public
133 N. Desert Stream Dr. * Tucson, AZ 85745-2277 * USA
voice/fax: (520) 624-2207 * email: dakatz45**At_Symbol_Here**msn.com
Visit my web site: http://www.chymist.com
______________________________________________________________________
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----- Original Message -----
From: Christopher Suznovich
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Sent: Sunday, October 24, 2010 11:14 PM
Subject: Re: [DCHAS-L] attaching tubing to glass
Depending on your application rubbing the glass with a water
to slightly moisten it will help the tubing slide on. Typically I've
always found a thin layer of vacuum grease on the glass tubing then
gently twist the tubing on works best. The vacuum grease is inert in
almost all cases and provides and airtight seal as well.
=09
Chris
=09
=09
=09
________________________________
From: "House, Katherine C."
Reply-To: DCHAS-L Discussion List
Date: Fri, 22 Oct 2010 15:20:08 -0400
To:
Subject: [DCHAS-L] attaching tubing to glass
=09
A step in one of the analyses we do in our lab involves
connecting Tygon tubing to the end of a glass tube. We have Kevlar
gloves for this purpose, but I've heard of an additional safety device
that can also be used for this purpose-though I can't find one. I've
done the obligatory Google search with no luck. Has anyone heard of
or used anything that reduces the risk of getting cut while attaching
hose/tubing to glass tubes or rods?
Many thanks; I hope everyone has a great weekend!
Katherine C. House, CCHO
Laboratory Coordinator
Chemical Hygiene Officer
Cormetech, Inc.
5000 International Drive
Durham, NC 27712
919.620.3044 (office)
919.815.2024 (mobile)
=09
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be reproduced, copied, lent, or disposed of directly or indirectly nor
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