Abstract
A number of closely related acid digestion procedures are proposed for the accurate analysis of animal tissue, plant tissue, sediment and particulate samples. A closed teflon vessel is employed to reduce contamination and to speed up digestion. Procedures which minimize evaporations should be employed where applicable. Hydrofluoric acid is essential when plant tissue, sediment and particulate material are to be dissolved. Accuracy and precision is assessed using standard reference samples.
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