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Analysis for Cu+1 and Cu+2 in Alkaline copper bath

We are testing a new alkaline copper bath that uses acetates and 1-hydroxyethyldiene-1,diphosphoric acid as the copper carrier. How can I analyze for the Cu+1 and Cu+2 concentrations? It would be really nice if the method wasn't gravimetric.
thanks!
dave compton

ps. this bath is lousy...stick with Cyanide,...

David Compton
Transmission Mfg. - Fort Worth, Texas
2005

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