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Subject:
From:
Douglas Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 17 Mar 2011 16:31:39 -0500
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Thank you Inge,
Yes, Oneida first came to mind as they do an excellent job for Rockwell 
when we need RGA analysis, but they said the presence of liquid would foul 
their analysis.

Doug Pauls



Inge Hernefjord <[log in to unmask]> 
03/17/2011 04:23 PM

To
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
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Subject
Re: [TN] Hydrogen gas analysis






Hi Dough,
 
why does he ask? Of course it's >H2 or ions of H. There are numbers of 
sniffers, e.g. this one:
 
http://www.makelengineering.com/dir/Technologies/Hydrogen%20Detection/Hydrogen.htm
 
to determine percentage is probably tricky. We use Oneida N.Y.C. As far as 
I remember, they can determine %age by anticipate bal > H2.  
I'm not a chemical guy myself.


 
On 17 March 2011 09:09, Douglas Pauls <[log in to unmask]> wrote:
Good morning all,

I am posting this question for a colleague (not Hillman).

Take a look at this picture which Steve has graciously posted on his web
page.

http://stevezeva.homestead.com/Bowed_Electrolytic.jpg

This is an electrolytic capacitor and I don't have any access to the
processing history.  Presumably it went through reflow.  My colleague
would like to determine if there is hydrogen in this swelled device and if
so, what percentage.  There is presumably both liquid and gas inside the
swelled area which would complicate any standard residual gas analysis.
Hydrogen is too light for GCMS detection.

OK all you chemists, how would hydrogen presence and concentration be
determined here? And do you know of any commercial labs which would
perform that service?

Doug Pauls
Rockwell Collins

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