Effect of inorganic matrices on the determination of cadmium by atomic-absorption spectrometry with electrothermal atomisation

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Abstract
The atomisation energies of various cadmium compounds were determined and their values compared with literature data. On this basis, mechanisms of atomisation of cadmium nitrate, chloride and sulphate are postulated. Atomisation was also studied in the presence of sulphuric, nitric and hydrochloric acids and their sodium, calcium and magnesium salts. Taking into account the shape, position and height of the peaks, the probable mechanism of interference was established. Minimum interference effects were obtained when the samples contained nitric acid or metal nitrates.

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