title: Spectrophotometric determination of copper in alkaline solutions and evaluation of some hydroxy-substituted 1,10-phenanthrolines as chromogenic reagents.
abstract: Seven new hydroxy-substituted 1,10-phenanthroline derivatives have been evaluated as chromogenic reagents for the determination of copper in strongly alkaline solution. The most sensitive of these, 2,9-dimethyl-4,7-dihydroxy-1,10-phenanthroline, has proven to be highly effective in a simple, rapid procedure for determining trace amounts of copper in sodium hydroxide, potassium carbonate, sodium phosphate or ammonium hydroxide.
authors.affiliation: Department of Chemistry, Michael Faraday Laboratories, Northern Illinois University, DeKalb, Illinois 60115, U.S.A.
authors.forename: W E
authors.initials: WE
authors.lastname: Dunbar
authors.forename: A A
authors.initials: AA
authors.lastname: Schilt