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The electrometric titration of hemin and hematin

Conant, James B. and Alles, Gordon A. and Tongberg, C. O. (1928) The electrometric titration of hemin and hematin. Journal of Biological Chemistry, 79 (1). pp. 89-83. ISSN 0021-9258.

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It was shown 5 years ago (1) that the change from methemoglobin to hemoglobin could be studied by an electrochemical method. The reduction by means of sodium hydrosulfite and the oxidation of the reduced compound (hemoglobin) by ferricyanide were found to involve 1 equivalent. These results have been confirmed and extended in later work (2). An application of the same method to a study of the reduction of alkaline hematin solutions (1) yielded uncertain results which seemed to indicate that 2 equivalents of hydrogen were involved in the reduction of this compound. No definite conclusion could be drawn from the data, however. A continuation of this work has now shown that satisfactory electrochemical titration curves may be obtained if titanous tartrate is employed as the reducing agent. The results are very definite and show that the change involves only 1 equivalent.

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Additional Information:Copyright © 1928, American Society of Biological Chemists. (Received for publication, June 22, 1928.)
Issue or Number:1
Record Number:CaltechAUTHORS:CONjbc28
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11790
Deposited By: Archive Administrator
Deposited On:29 Sep 2008 20:42
Last Modified:03 Oct 2019 00:22

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