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  • Title: Rapid and selective spectrophotometric determination of manganese in steels and alloys using resacetophenone oxime.
    Author: Rao CK, Babaiah O, Reddy VK, Reddy TS.
    Journal: Talanta; 1992 Oct; 39(10):1383-5. PubMed ID: 18965545.
    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.
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