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Abstract
The photometric determination of manganese described is based on the oxidation of the Mn to permanganate by means of persulphate, reaction with tetraphenylarsonium chloride, extraction of the complex with dichloroethane from 0.7 N sulphuric acid solution and measurement of the absorption of the extract at 528 nm. Manganese can be determined in the ppm-range in iron, steel, nickel, copper, aluminium and magnesium. Interferences are caused by larger concentrations of chromium.
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