title: Quantitative reflectometry--IV, determination of copper in nickel-plating solutions.
abstract: The determination of copper in nickel-plating solutions with commercial test-strips has been investigated. The rate of colour development, which is normally slow in the presence of high concentrations of foreign ions, has been speeded up by flushing sample solutions over the strips, rather than by immersion. Relative precision is 2.7-12% over the concentration range 2-25 ppm of copper. The accuracy of the reflectance method compares favourably with that of atomic-absorption spectrophotometry and is better than that of a visual colorimetric procedure involving dithizone.
authors.affiliation: Kingston Polytechnic, Kingston-upon-Thames, Surrey, U.K.
authors.forename: D
authors.initials: D
authors.lastname: Kealey
authors.forename: J
authors.initials: J
authors.lastname: Johnston