Abstract
In the estimation of the residual glucose in the metabolic products of
Aspergillus parasiticus
Speare, it was found that very much lower results were given by the copper reduction method of Shaffer and Hartmann (1921) than by the iodine absorption method of Hinton and Macara (1924). In the latter method, which in all essential details is the same as that previously described by Willstätter and Schudel (1918), glucose is oxidized by iodine in alkaline solution, the only product arising from the glucose being gluconic acid (as the sodium salt) according to the equation: CH
2
OH . (CHOH)
4
. CHO + I
2
+ 3NaOH = CH
2
OH . (CHOH)
4
COONa + 2NaI + 2H
2
O.
Cited by
6 articles.
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