From: Monona Rossol <actsnyc**At_Symbol_Here**>
Subject: Re: [DCHAS-L] PPE for nanomaterial work from AIHA
Date: Thu, 19 Nov 2015 11:13:03 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 151208545db-53d1-427f**At_Symbol_Here**

It bothers me that the NIOSH blog study is so limited.  Only two types of nanoparticles, NaCl and Ag, were used and each of those were only used in one part of the chart that plots capture efficiency.  There are thousands of types of nanoparticles.  Some also not engineered but made by grinding processes or by chemical reactions.  Surely we can't just assume that all of these will function like the two in the chart.

The chart also shows a dip in efficiency at between the 30 and 100 nanoparticle size.  I'd love to see this plotted in conjunction with the diethylphthalate HEPA chart dip at 0.3 micon size.  Could it be that both of these efficiency charts are highly influenced by the electrostatic nature of the test substances?  That particle size is not the only factor in capture?  That charts with different substances would look very different?

Monona Rossol, M.S., M.F.A., Industrial Hygienist
President:  Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
181 Thompson St., #23
New York, NY 10012     212-777-0062


-----Original Message-----
From: Ellen M. Sweet <ems325**At_Symbol_Here**CORNELL.EDU>
Sent: Thu, Nov 19, 2015 10:00 am
Subject: [DCHAS-L] PPE for nanomaterial work from AIHA

Hi everyone,
AIHA has published a factsheet on control measures to use when working with nanomaterials.
Here's the link:
Ellen Sweet
Laboratory Ventilation Specialist
Department of Environmental Health and Safety
Cornell University

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