Date: Mon, 20 Jun 2011 19:02:26 -0500
Reply-To: Todd Perkins <p3wt3r**At_Symbol_Here**charter.net>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Todd Perkins <p3wt3r**At_Symbol_Here**CHARTER.NET>
Subject: Re: question
In-Reply-To: <8C28F3F9C0708141A611C73B4D80E70E0D70DEF16F**At_Symbol_Here**VA3DIAXVS461.RED001.local>


Back in my radiochemistry days, we used a conc nitric/sulphuric acid bath
 followed by a high resistivity (>18 MegaOhm) water bath for highly meta
l-sensitive radiochemistry. That eventually etches and embrittles the glass
, and it is extremely corrosive, but in my experience it does at least as
 well as a base bath for protein & metals removal.

Thanks,
Todd Perkins
Airgas Mid America

- Sent from my mobile phone
On Jun 20, 2011 11:24 AM, Demer, Frank R - (demer) <demer**At_Symbol_Here**EMAIL.ARIZONA.
EDU> wrote: 

One of our labs had a base bath fire over the weekend.  A researcher
 forgot there was alcohol in the bath and tried to extinguish a match, used
 to light a propane torch, in the bath.  Besides the obvious problem
 of using matches instead of a striker and the questionable use of a propan
e torch to dry glassware for a moisture sensitive reaction, can anyone reco
mmend an alternative to a base bath containing KOH solution, iso-propanol
 and ethanol?   Frank R. Demer, MS, CIH, CSPHealth Safety Officer
Industrial Hygiene and SafetyUniversity of ArizonaDepartment of Risk Manage
ment Services Phone:  520.621.3585Fax:  520.621.3706Email:  demer**At_Symbol_Here**email.arizona.eduMailing Address:  P.O. Box 210300, Tucson,
 AZ  85721-0300Street Address:  220 W. 6th St., Tucson, AZ 85701
 (2nd floor, East Bldg.)Web Address:  risk.arizona.edu   

Back in my radiochemistry days, we used a conc nitric/sulphuric acid bath followed by a high resistivity (>18 MegaOhm) water bath for highly meta l-sensitive radiochemistry. That eventually etches and embrittles the glass , and it is extremely corrosive, but in my experience it does at least as well as a base bath for protein & metals removal.

< div style="font-family: arial, sans-serif; font-size: 12px;color: #999999 ;">Thanks,
Todd Perkins
Airgas Mid America

- Sent from my mobi le phone


On Jun 20, 2011 11:24 AM, Demer, Frank R - (demer) <demer**At_Symbol_Here**EMAIL.ARIZONA.EDU> wrote:

One of our labs had a base bath fire over the weekend.  A researcher forgot there was alcohol in the bath and tried to extinguish a match, used to light a propa ne torch, in the bath.  Besides the obvious problem of using matches instead of a striker and the questionable use of a propane torch to dry gl assware for a moisture sensitive reaction, can anyone recommend an alternat ive to a base bath containing KOH solution, iso-propanol and ethanol?   ;

Frank R. Demer, MS, CIH, CSP

H ealth Safety Officer

Industrial Hygien e and Safety

University of Arizona

Department of Risk Management Services

Phone:  520.621.3585

Fax:  520.621.3706

Email:  demer**At_Symbol_Here**email. arizona.edu

Mailing Address :  P.O. Box 210300, Tucson, AZ  85721-0300

Street Address:  220 W. 6th St., Tucson, AZ 85701 (2nd floor, East Bldg.)

Web Address:  risk.arizona.edu

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