iodine face masks

[<L691731@LMSC5.IS.LMSC.LOCKHEED.COM>]

The only respirator cartridge I am aware of that is specifically rated
for iodine as part of its NIOSH approval is the MSA model GMI-H. It is a
two stage filter with a HEPA element followed with the chemical
adsorbent portion which I believe is charcoal doped with something. If
you need to remove the charcoal from the cartridge to count, I am sure
you are faced with devising a way to do it yourself by destroying the
cartridge. I can't imagine anyone getting a NIOSH approval for a design
which is easy to open, and therefore easy to tamper with. These filters
are useful on a wide range of MSA full and half face respirators.

Steven Souza, Lockheed Missles and Space Co., Inc.
Alternate Radiation Safety Officer    tel (408) 742-0767
Sunnyvale, CA 94089                   fax (408) 742-0611
PROFS: SSOUZA  Internet: L691731@lmsc5.is.lmsc.lockheed.com
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Date: Thu, 2 Mar 95 08:06:12 -0600
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From: "Rivenbark, Melodie" <mrivenba@research.usf.edu>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Subject: iodine face masks
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X-Comment:  Radiation Safety Distribution List

     I am trying to locate a radioiodine respirator with the charcoal
     filters that can be removed for counting.  Does anyone know where I
     can locate this item?