Tin in rocks, soils and sediments

Cassiterite-bearing samples are attacked by volatilisation with ammonium iodide, and the sublimate containing the tin is dissolved in dilute tartaric acid. The solution can be used for normal nebulisation into an air—acetylene flame for high levels, or for hydride formation for low levels of tin. Interfering elements are not volatilised [14]. 

Applications of atomic absorption spectrometry in the petroleum industry 

Atomic absorption spectrometry (AAS) is a technique of particular utility in the determination of trace elements in petroleum feedstuffs and products [1, 2], It combines the virtues of simplicity, sensitivity, wide elemental coverage and relatively low cost. 

Problems of trace element analysis in the petroleum industry are many and varied in their nature. For this reason it is not possible to present here detailed methods for every possible combination of element of interest and sample type. Methods are presented for the most common analytical problems but many other determinations may be made with only minor changes to the methods given. 

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