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From: dbell@cup.portal.com (David J Bell)
Newsgroups: sci.chem,sci.electronics
Subject: Ion concentration measurement
Message-ID: <32660@cup.portal.com>
Date: 10 Aug 90 19:27:18 GMT
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I'm looking for an inexpensive method of electronically measuring
the concentration of copper ion in a water solution. I don't need
great accuracy, even +/- 5 or 10% will be adequate. The level I'm
reading will be on the order of 2 ppm, in the presence of a bunch
of other "junk". I'd expect to get a low-level voltage or current
which I could amplify and read with an A/D and microprocessor for
a simple process control application. Long term stability of maybe
a few percent and low cost are prime factors, with ruggedness not
far behind...

Thanks!

Dave       dbell@cup.portal.com