From: Betsy Shelton <retrosynthesis**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] working with nanomaterial
Date: October 3, 2012 12:53:18 PM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <4CB9A51AE5B8C44BA13375C794CBA29A8DA6D7E222**At_Symbol_Here**>

I use a low flow hood manufactured by Flow Sciences,, for carbon nanotube weighing operations. I ordered the hood with a white base instead of black so operators could see surface contamination more easily. I also use the waste chute feature to capture residual particles from empty bags, weighing tools, outer gloves, surface coverings, and wet wipes. I agree with other posts that operators should be trained to use slow arm movements to avoid overcoming low flow rates.

Michael Ellenbecker and Candace Tsai at UMass Lowell have done several studies on enclosure effectiveness for nanoparticle handling operations.

Cena, Peters (2011)

Best regards,

Betsy Shelton, MSIH

On Tue, Oct 2, 2012 at 8:00 AM, Yung Morgan <pmorgan**At_Symbol_Here**> wrote:

Dear members,

Does anyone have a source on a containment system for safely weighing dry nanomaterial? A chemical hood is usually too turbulent for the accuracy of a Mettler balance. Any thought you have including precaution(s) to take for this type of work would be appreciated.

Thank you and keep up the great work you do.

Yung Morgan, MsPH
Laboratory Safety
Industrial Hygiene Services
Environmental Health and Safety
117 Draper hall
UMASS,Amherst MA 01003
phone (413) 545-2682
Fax (413) 545-2600
email : pmorgan**At_Symbol_Here**

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