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Roger Phillips
By Roger Phillips
Published 2006
SV sulpho-vanillin: a few crystals of vanilla dissolved in 2ml conc. sulphuric acid +2ml distilled water to give a yellow solution. A drop placed on a Russula stem discolours violet-purplish in most cases, carmine in other species.
© 2006 All rights reserved. Published by Macmillan.