title: Spectrophotometric determination of platinum in experimental catalysts.
abstract: Conditions have been established and procedures are described for the colorimetric determination of platinum in experimental catalysts and miscellaneous materials. The methods are based on the measurement of the intensity of colour produced by the reaction of chloroplatinic acid with tin(II) chloride. Interference from metals such as chromium, molybdenum and nickel, which are often also present in catalysts, is overcome by selective extraction of the complex into isoamyl alcohol followed by measurement of the absorbance of the alcohol layer.
authors.affiliation: Imperial Chemical Industries Ltd. Agricultural Division Research and Development Department Billing-ham Co. Durham, U.K.
authors.forename: T D
authors.initials: TD
authors.lastname: Rees
authors.forename: S R
authors.initials: SR
authors.lastname: Hill