Abstract
The system manganese(VII)-methyl violet(MV)-water-chloroform has been studied. The composition of the complex is established as MV: MnO4−=1:1. The molar absorptivity of the complex is (2.67 ± 0.09) × 104 l mol−1 cm−1 at 300 nm, limit of detection is 0.027 μg ml−1 and the system obeys Beer’s law in the range 0.22–1.6 μg ml−1 Mn(VII). The characteristic values for the extraction equilibrium and the equilibrium in the aqueous phase was determined. The influence of foreign ions on the accuracy of the results is investigated. Extraction investigations of the system discussed were carried out. A new rapid, selective, simple and sensitive extractive-spectrophotometric method for the determination of trace amounts of manganese(VII) in plants, soils and steels were developed.
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