Abstract
A method is described for the determination of cadmium in plant materials and acetic acid extracts of soils. Cadmium is collected from aqueous solutions by dithizone-in-chloroform solvent extraction and determined by atomic absorption spectrometry with a carbon-rod atomizer. A detection limit of 0.001 p.p.m., in the aqueous solution, with a precision of±3–4% is obtained. Interference effects are negligible and the method has been in routine use for over two years.
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