From: "Nail, John" <jnail**At_Symbol_Here**OKCU.EDU>
Subject: Re: [DCHAS-L] ductless fume hoods for acid digestion
Date: Mon, 26 Jan 2015 16:38:53 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: D0EBC9B1.731A%jnail**At_Symbol_Here**

Using a ductless hood for acid digestions only if each of the following are met:
  1. Industrial, not an academic setting. Researchers come and go too quickly in academia to make this work. Also, in Academia, researchers can't be fired for violating safety protocols.
  2. The hood manufacturer is willing to certify that their product is appropriate for this use and will agree to replace the hood if the acid vapors result in hood failure before the end of the hood's expected lifetime (20 years?). Both the certification and warranty will, of course, need to be in writing.
  3. The hood is clearly and conspicuously labeled with the materials that can be used in it and the label explicitly tells users not to use any material that isn't listed, and
  4. Each user signs a statement that acknowledges what he/she can and cannot use in the hood.
Please let us know if a ductless hood manufacturer will certify a hood for 20 years of acid digestions.

John Nail
Professor of Chemistry
Oklahoma City University

From: "melissa.ballard**At_Symbol_Here**US.MICHELIN.COM" <melissa.ballard**At_Symbol_Here**US.MICHELIN.COM>
Reply-To: DCHAS-L Discussion List <dchas-l**At_Symbol_Here**MED.CORNELL.EDU>
Date: Monday, January 26, 2015 5:37 AM
To: DCHAS-L Discussion List <dchas-l**At_Symbol_Here**MED.CORNELL.EDU>
Subject: [DCHAS-L] ductless fume hoods for acid digestion

Good morning all! I have to take a minute to get some additional opinions on a topic. I've been approached to provide my 2 cents on the appropriateness of using a ductless fume hood for acid digestion (preparing samples for analysis via AA). This would be for use in an industrial quality lab.

I have my opinion; what is yours?


Melissa D. Ballard, MSPH, CIH, CHO
Industrial Hygienist / Industrial Hygiene Chemist
Michelin North America
1401 Antioch Church Road
Greenville, SC 29605

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