Into a volatile acid apparatus introduce a few glass beads, and over
these place 20 grams of the unground sample. Add 100 cc. of recently
boiled water to the sample, place a sufficient quantity of recently
boiled water in the outer flask and distil until the distillate is no
longer acid to litmus paper. Usually 100 cc. of distillate will be
collected. Titrate the distillate with N/10 alkali, using
phenolphthalein as an indicator. Express the result as the number of cc.
of N/10 alkali required to neutralize the acidity of 100 grams of the
sample.
UNOFFICIAL METHODS