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The separation, concentration, and determination of trace elements in iron ores is described. After the sample has been dissolved, the iron is separated by liquid-liquid extraction with a liquid cation-exchanger, di-(2-ethylhexyl) phosphoric acid. The trace elements aluminium, cadmium, calcium, chromium, cobalt, copper, lead, magnesium, manganese, mercury, potassium, sodium, vanadium, and zinc are determined in the aqueous phase by atomic-absorption spectrophotometry.
Iron (III) chloride is separated from the trace elements in iron ores. After dissolution of the sample, the iron in 6M hydrochloric acid solution is separated, by liquid-liquid extraction with methyl isobutyl ketone, from the alkali metals, alkaline earth metals, lead(II), aluminium(III), titanium(IV), chromium(III), nickel(II), copper(II), cobalt(II), manganese(II), and zinc(II). After concentration of the aqueous phase by evaporation, the trace elements are measured by the use of atomic-absorption spectrophotometry or direct-reading spectrometry with excitation from an inductively coupled plasma source, or both. The separation procedure is rapid, resulting in reduction of the time required for analysis by the direct method, because only a limited number of dilutions are necessary, and the method of additions is not needed to compensate for interferences from the iron. The extractions of chromium(III), copper(II), nickel(II), strontium(II), rubidium(I), cobalt(II), manganese(II), zinc(II), barium(II), lead(II), aluminium(III), and titanium(IV) are at least 96 per cent.
The best way to determine trace elements! This easy-to-use handbook guides the reader through the maze of all modern analytical operations. Each method is described by an expert in the field. The book highlights the advantages and disadvantages of individual techniques and enables pharmacologists, environmentalists, material scientists, and food industry to select a judicious procedure for their trace element analysis.
Metalliferous minerals, Sampling methods, Design, Chemical composition, Installation, Specimen preparation, Size classification, Loading (materials handling), Batch testing, Materials handling equipment, Iron ores, Samples, Sampling equipment, Determination of content, Moisture measurement