Authors: Ioseph S Balogh Vasil Andruch Mária Kovács
Publish Date: 2003/08/19
Volume: 377, Issue: 4, Pages: 709-714
Abstract
A new simple rapid and sensitive spectrophotometric method has been developed for the determination of manganese in sewage The method is based on the reaction of manganese with derivatives of 133trimethyl23133trimethyl13Hindol2ylidenepropenyl3Hindolium to form a colored ion associate with a sensitive absorption maximum at 560 nm The appropriate reaction conditions have been established pH 85–100 125–23×10−3 mol L−1 1nitroso2naphthol and 16–24×10−4 mol L−1 dye reagent Beers law is obeyed for manganese concentrations up to 42 mg L−1 The limit of detection is 001 mg L−1 Mn2+ the molar absorptivity of the ion associate was 75×104 L mol−1 cm−1 The effect of various foreign ions was examined A reaction mechanism is suggested The developed procedure was tested for determination of manganese in sewage with satisfactory precision and accuracy
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