title: Rapid and selective spectrophotometric determination of manganese in steels and alloys using resacetophenone oxime.
abstract: A sensitive spectrophotometric method is developed for the determination of manganese in aqueous medium. The metal ion forms a yellowish brown coloured complex with resacetophenone oxime (RPO) in ammonium chloride and ammonium hydroxide buffer of pH 10.5. The 1:1 complex shows maximum absorbance at 380 nm with a Beer's law range of 0.09-1.7 ppm. The molar absorptivity and the Sandell sensitivity are found as 2.5 x 10(4) l.mole(-1).cm(-1) and 0.002 mug/cm(2), respectively. The stability constant of the complex calculated by Job's method is 7.5 x 10(5). The interfering effects of various cations and anions are studied. The present method is applied to the determination of manganese in some steel and alloy samples.
authors.affiliation: Department of Chemistry, Sri Krishnadevaraya University, Anantapur 515 003, India.
authors.forename: C K
authors.initials: CK
authors.lastname: Rao
authors.forename: O
authors.initials: O
authors.lastname: Babaiah
authors.forename: V K
authors.initials: VK
authors.lastname: Reddy
authors.forename: T S
authors.initials: TS
authors.lastname: Reddy