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Douglas A. MacFadyen
Researcher at Rockefeller University
Publications - 14
Citations - 1353
Douglas A. MacFadyen is an academic researcher from Rockefeller University. The author has contributed to research in topics: Ninhydrin & Urea. The author has an hindex of 11, co-authored 14 publications receiving 1348 citations.
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Gasometric determination of carboxyl groups in free amino acids
TL;DR: The method here presented depends on the fact that a-amino acids, when boiled in water with an excess of ninhydrin (triketohydrindene hydrate) at pH 1 to 5, evolve the CO2 of their carboxyl groups quantitatively in a few minutes.
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Determination of free amino acids by titration of the carbon dioxide formed in the reaction with ninhydrin
TL;DR: In the present method, the CO2 evolved by decarboxylating amino acids with ninhydrin is transferred to standard barium hydroxide and titrated as mentioned in this paper.
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