Re: Self-Absorption Effects on Air Filters

[Andy Hull <hull@mail.sep.bnl.gov>]

Emily,
As you are aware, self-absorption is a problem in the evaluation of alpha
activity collected on filter media.  The references that I'm familiar with
recommend the use membrane filters which collect airborne material at the
filter surface.
Andy 


At 08:47 AM 10/6/98 -0500, you wrote:
>     To refine my request:
>     
>     Is there a specific procedure, series of equations, or methodology (a 
>     cookbook recipe would be nice) that defines how to evaluate alpha 
>     self-absorption effects on air filters? The filters I'm interested in 
>     are mixed esters of cellulose and the pumps they are attached to pull 
>     40 liters per minute.
>     
>     Thanks,
>     Elizabeth Algutifan, MS
>     Elizabeth_Algutifan@wssrap-host.wssrap.com 
>     Weldon Spring Site Remedial Action Project 
>     St. Charles, Missouri
>     
>
>
>______________________________ Forward Header
__________________________________
>Subject: Self-Absorption Effects on Air Filters
>Author:  Elizabeth Algutifan at WSSRAP_TECH
>Date:    10/5/98 3:59 PM
>
>
>     Radsafers,
>     Can anyone recommend some references that cover the issue of alpha 
>     self-absorption corrections for air monitoring results?  Thanks for 
>     your help.
>     
>     Elizabeth Algutifan, MS
>     Elizabeth_Algutifan@wssrap-host.wssrap.com 
>     Weldon Spring Site Remedial Action Project 
>     St. Charles, Missouri
>
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