The differential titration of mixed strong and weak acids. A method for "free HCl" in gastric contents, etc
Open Access
- 1 May 1934
- journal article
- research article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character
- Vol. 115 (792) , 170-180
- https://doi.org/10.1098/rspb.1934.0034
Abstract
Current methods of estimating "free HC1" in acid mixtures are examined and reasons adduced for preferring either the Gunzberg method or a pH 2 titration. Both methods are superseded in accuracy and simplicity by a titration in 90% acetone solution using [rho]-benzenesulphonic acid-azo-a-naphthylamine (described as naphthylamine orange) as indicator. The exact end-point is controlled at pH 3.4 or 4.0 (pH in acetone) according to the nature of the acids of the mixture. A comparison of the methods on acid solutions of known composition is carried out.This publication has 2 references indexed in Scilit:
- STUDIES IN GASTRIC SECRETIONPublished by Elsevier ,1931
- THE TITRATION OF ORGANIC ACIDS IN URINEPublished by Elsevier ,1926