title: Determination of iron at ng/ml level by solid phase spectrophotometry after preconcentration on cation exchange filters.
abstract: A cationic exchanger paper is used to retain analytes in solution and, after drying, to analyze directly by measuring the UV-Vis absorbance of the paper. The method was applied to determination of iron using its known 1,10-phenanthroline complex. Using 100 ml of sample the applicable concentration range was between 1.0 and 10.0 ng/ml with a detection limit of 0.2 ng/ml and a RSD around 2%. The method was applied to determination of iron total in snow, human serum and wine.
authors.affiliation: Department of Analytical Chemistry, University of Granada, Granada, Spain.
authors.forename: F C
authors.initials: FC
authors.lastname: García
authors.forename: R
authors.initials: R
authors.lastname: Checa
authors.forename: R
authors.initials: R
authors.lastname: Avidad
authors.forename: L F
authors.initials: LF
authors.lastname: Capitán-Vallvey