On 17 Jun 2008 at 17:19, Brian Ellis wrote:

> If the activated carbon filters on the masks are saturated, then they
> are worse than useless. If the operators can smell the stuff, then
> they must be saturated. A filter is generally quite small, typically
> containing 30-40 g of carbon, which may adsorb, say, 5 g or so
> solvent. I suggest that you find a scuba diver who will lend you his
> tanks!

Or, if you have pressurised air in a appropiate quantity and quality 
available out of the wall plug, you could use masks with supply from 
that pressurised air. Many work safety manufacturers (like Draeger, 
Auer-MSA etc.) offer such stuff. Just a special hose for the "wall 
plug", pressure regulator to wear at a belt, another hose to the 
mask.

Best wishes
Matthias



> 
> Ken Bloomquist wrote:
> > I have an unusual question for all you chemical types out there.
> > 
> > We are doing some heavy cleaning with IPA and our organic vapor
> > cartridges on the respirator masks don't seem to keep the smell of
> > the IPA away from the operator. According to the different data
> > sheets I've looked at say that an organic vapor cartridge should
> > work.
> > 
> > My question is can you still smell the fragrance of the IPA while
> > having all the bad stuff trapped by an organic vapor cartridge? If
> > so how would you know when the cartridge was saturated?
> > 
> > Thanks,
> > 
> > KennyB
> > 
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-- 
Matthias Mansfeld Elektronik * Leiterplattenlayout
Neithardtstr. 3, 85540 Haar; Tel.: 089/4620 093-7, Fax: -8
Internet: http://www.mansfeld-elektronik.de
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