Neat solution!

Bob
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
Sent: Thursday, March 17, 2011 5:24 PM
To: [log in to unmask]
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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