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Date: | Tue, 11 Sep 2012 16:59:51 +0000 |
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Better acetate, than potentate.
Dewey
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Tuesday, September 11, 2012 9:29 AM
To: [log in to unmask]
Subject: Re: [TN] Source of IC Contamination Species
Good morning Rich,
You may find these related to the plastic bags used for the extractions. I
have had occasion in the past to do extractions in the bags and also
extraction in glass/Pyrex beakers. I see acetate and formate in the bag
samples and not in the beaker samples, but higher sodium in the beaker
samples and not in the bag samples.
Of course, your facilities could be infested with Acetate Gnomes.
Doug Pauls
From: Richard Kraszewski <[log in to unmask]>
To: <[log in to unmask]>
Date: 09/11/2012 11:12 AM
Subject: [TN] Source of IC Contamination Species
Sent by: TechNet <[log in to unmask]>
Occasionally, IC analyses are reported to have elevated levels of acetates
and formates. Is it the general consensus that source of these
contamination is assumed to be the decomposition of larger molecular
weight weak organic acids found in soldering fluxes? I can't imagine that
any manufacturer would actually be placing acetic or formic acids directly
into a flux formulation. These are much too volatile and aggressive.
Thoughts?
Rich Kraszewski
Senior Process Engineer
PLEXUS
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