> Hi Rudy,
>
> Thanks for your reply.  Certainly, I would be interested in reviewing the
> methods of which you speak.  If you would be willing to send those to me,
I
> would appreciate it.  You confirm my suspicions that one would need to
have
> an absorbance detector and the appropriate complexing substances and/or
> titration equipment ( I have neither) so I am unable to do this test.
Also,
> is this a restricted substance? And if so, would it require a special
> handling license?  Is it possible for you to perform this analysis?  If
so,
> I will put you in contact with the client.
>
> Best Regards,
>
> Joe Russeau
> Process Analyst
>
> Precision Analytical Laboratory, Inc.
> 4106 Cartwright Dr. Ste. A
> Kokomo, IN 46902
>
> P: 765-455-1993
> F: 765-455-1996
> E: [log in to unmask]
>
> ----- Original Message -----
> From: "R Sedlak" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, January 03, 2006 2:11 PM
> Subject: [TN] Testing for Thiourea
>
>
> > Joe:
> >
> > If your client wants to control Thiourea in an immersion Tin bath, you
> probably want more than a simple analysis for Thiourea.  Thiourea is not
> consumed in the immersion Tin reaction, it is complexed, and moves from
> complexing the Tin, in a new bath, to complexing the dissolved Copper, as
> the bath is used.
> >
> > My suspicion is that your client really wants to control for free,
> uncomplexed Thiourea...
> >
> > I have two methods in my box of tricks, one for total Thiourea, by UV
> absorbtion, and a titration for uncomplexed Thiourea.
> >
> > I can forward any/all... would this help?
> >
> > Rudy Sedlak
> > RD Chemical Company
> >
> > Joe Russeau <[log in to unmask]> wrote: Good Afternoon All,
> >
> > Happy New Year to all of you.  I have a question for a client who is
> looking to find a lab who has the ability to analyze for thiourea.  My
> understanding is that this is an additive used for PCB's undergoing the
> immersion tin process.  Does anyone know of a facility that has the
ability
> to analyze for this substance?
> >
> > Best Regards,
> >
> > Joe Russeau
> > Process Analyst
> >
> > Precision Analytical Laboratory, Inc.
> >
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