title: Dual-wavelength spectrophotometric determination of copper in sea-water with alpha,beta,gamma, degrees -tetrakis(1-methylpyridinium-4-yl) porphine.
abstract: Copper has been determined by dual-wavelength spectrophotometry with alpha,beta,gamma, degrees -tetrakis(1-methylpyridinium-4-yl) porphine (TMPyP). The difference in absorbance at the Soret band of the copper complex (423 nm) and that of TMPyP (446 nm) was measured. Copper in a coastal sea-water sample was preconcentrated with a Chelex-100 separation in which l-cysteine was used as eluent. This combination could determine copper at the ng/ml and sub-ng/ml level.
authors.affiliation: Department of Applied Chemistry, Muroran Institute of Technology, Mizumoto-cho 27-1, Muroran, Hokkaido, 050 Japan.
authors.forename: H
authors.initials: H
authors.lastname: Watanabe
authors.forename: H
authors.initials: H
authors.lastname: Ohmori