Abstract
Publisher Summary There are a variety of chemical procedures described for determining bismuth in silicate and other rocks, but those procedures are applicable primarily to rock materials that are enriched in bismuth. These include photometric methods based upon dithizone after the extraction of bismuth iodide into isoamyl acetate and on extraction as bismuth diethyldithio-carbamate; an atomic absorption method involving the extraction of soluble bismuth into nitric acid and nebulisation into an air-acetylene flame; and a polarographic method applied after an extraction with diethylammonium diethyl-dithiocarbamate. None of these methods is of sufficient sensitivity for determining bismuth in normal silicate rocks. Methods to determine bismuth in normal silicate rocks are based upon flameless atomic absorption spectroscopy (AAS). This chapter describes the procedure to determine bismuth using flameless atomic absorption spectroscopy. Peak height measurements may be used to construct the calibration graph from which the concentration of bismuth in the original rock material can be calculated.
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