title: [Determination of trace iron and cobalt in natoral water by ammonium thiocyanate resin phase-spectrophotometry].
abstract: At the presence of Tween-80 in acid medium, Fe(III) Co(III) and SCN- are changed into coloured complexations and quantitatively absorbed on the resin. The apparent molar absorptivities of resin phase are epsilon Fe = 2.4 x 10(5)L x mol(-1) x cm(-1) at 490nm and epsilon Co = 2.1 x 10(5)L x mol(-1) x cm(-1) at 630nm by spectrophotometry. Beer's law is obeyed by Fe(III) and Co (III) in the range of 0-8microg/25mL and 0-15microg/25mL. method has been applied to natural water. Relative standard deviations are 1.7% and 5.5%, respectively.
authors.affiliation: Department of Chemistry, Inner Mongolia Normal University, 010022 Hohhot.
authors.forename: R
authors.initials: R
authors.lastname: Ga
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: G
authors.initials: G
authors.lastname: Li
authors.forename: S
authors.initials: S
authors.lastname: Bao
authors.forename: Q
authors.initials: Q
authors.lastname: Hasi