Hi,
are there any microwave digestion/oxidation procedures for sulfides (e.g. Na2S, Na2Sx, Ag2S) for further determination of S via ICP-OES ?
I need to do the digestion, since the sulfur in non-digested samples may cause problems with memory effects in the tubings of the ICP-OES device.
But I am afraid, that the aqua regia digestion will produce H2S, which will evaporate and the I will get false results for S, or if it stays in the solution, it will cause the same memory effects.
Is H2O2 (produces SO42- in reactions with sulfides) usable for microwave digestion also?
Thanks,
Jan
Henry Foden
Another method is to use a low temperature oxidation with bromine in carbon tetrachloride followed by addition of nitric acid.
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