According to Bunzener and Fries _(Zeitschrift fur das gesammte
Brauwesen_), a thick, sirupy starch paste prepared with a boiling one
per cent solution of salicylic acid is only very slowly saccharified,
and on cooling deposits crystalline plates of starch. For the
determination of starch in barley the finely-ground sample is boiled for
three-quarters of an hour with about thirty times its weight of a one
per cent solution of salicylic acid, the resulting colorless opalescent
liquid filtered with the aid of suction, and the starch therein inverted
by means of hydrochloric acid. The dextrose formed is estimated by
Fehling's solution. The results are one to two per cent higher than when
the starch is brought into solution by water at 135° C.
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