Sample Preparation - Graphite digestion using HClO4 / H2SO4 with vanadium catalyst
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Many of the digestion techniques referenced are described in: Decomposition Methods in Analytical Chemistry (1979), Rudolf Bock, Halsted Press, New York. This book is a very good resource and summarizes many digestion techniques, while providing an extensive reference list for more detailed information. It’s unclear as to why the digestion time scales vary so widely, though the usual suspects would include relative particle size, corresponding surface areas, is the sample periodically agitated gently, etc. The Bock book also lists other decomposition methods for graphite that might be more suitable, particularly with respect to digestion times. |