Date: Mon, 30 Nov 2009 13:56:59 -0500
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: "Kohler, Chris E" <cekohler**At_Symbol_Here**INDIANA.EDU>
Subject: Re: HF digestion safety
In-Reply-To: <8E5C750D-2C78-4CFC-9D6C-90D7FC1D6FC2**At_Symbol_Here**>

We just installed an HF hood with plastic ducts and fan parts, etc. No scru
bbers or filters though. You might check with Sentry or Captair and check t
heir ductless fume hoods to see if HF is an acceptable application. I have 
heard the filters are expensive and you must be prepared to change them at 
the appropriate time. The other option may be to use a Parr bomb with a Tef
lon liner.


-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Jo
seph Passante
Sent: Monday, November 30, 2009 9:41 AM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] HF digestion safety

Does anyone on this list have experience with proper exhaust design  
for small scale digestion using 48% HF?  The geochemistry researcher I  
am working with anticipates evaporating 2 liters of concentrated HF  
per month in a fume hood.

I am interested in scrubbing technologies and if anyone has designed  
local exhaust systems that do not involve a fume hood.



Joseph R. Passante, CIH, CHO
Associate Director
Chemical Hygiene Officer
Environmental Health & Radiation Safety
University of Pennsylvania

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