[ RadSafe ] Air Sample Handling

[John Andrews]

Nielsen, Erik wrote:
> I am weighing options for handling high volume air particulate samples
> (4in and 8x10" )in the field.
>
> Currently we use commercial plastic bags (ziplock) to preserve the
> sample during handling and shipping to an analytical laboratory.  We are
> considering using an inner envelope of glassine to reduce the quantity
> of material dislodged from the filter paper during sample handling.
>
> I am not sure that glassine has significantly less static electricity
> buildup than the plastic bags themselves and would like opions as well
> as any emperical data to support a specific filter handling regime.
>
> Erik C. Nielsen 
> Senior Scientist 
> Remote Sensing Laboratory 
> P.O. Box 98521, M/S RSL-47 
> Las Vegas, NV 89193-8521 
> http://www.nv.doe.gov/nationalsecurity/homelandsecurity/frmac/default.ht
> m 
> Voice 702-295-8954 
> Fax 702-794-1007 
> Pager 702-794-7222 
> Cell 702-630-2323 
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> Text to Cell: 7026302323 at mmode dot com (plain text please) 
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>   
Many years ago, I found that the standard glassine envelope was 
constructed with a seam that could go across the face of the filter.  
Glassine is hard to write on too.  I designed a paper envelope made of 
coated paper that was only coated on one side.  This was folded to be 
the inside of the envelope.  The outside was easy to write on and was 
printed with the standard information blocks and a statement that the 
envelope may contain radioactive material.   The folds and seams on the 
envelope were all at the edges of the  envelope, not across the body 
anywhere.  This  turned out to be a money loser for the vendor because 
of the fold. These worked better than any standard envelope.

John Andrews, Knoxville, Tennessee