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**UMAOITEXMB.oit.ads.umass.edu>
Demystify:
I use a low flow hood manufactured by Flow Sciences, http://www.flowsciences.com/brNanotechnology/tabid/66/Default.aspx, 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.
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.
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