Rapid decomposition method for silicate samples

Summary This paper describes a rapid dissolution method for silicate samples such as soils and sediments. 0.1–0.2 g sample was decomposed with HNO₃/H₂O₂/HF acid mixture in a PTFE digestion vessel by using microwave heating for 3 min at 500 W of microwave power. The solution, to which 0.5 g of boric acid was added, was diluted to 50 ml and then filtered. Nine elements in the filtrate were determined by sequential ICP-AES. The accuracy of this procedure was validated by analyzing three SRMs for soil and sediment. All results were in good agreement with the certified values.

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Schneller Aufschluß von Silicatproben