Abstract
The free HC1 of the gastric contents may be easily titrated using brom phenol blue as an indicator. The “total acidity” has no chemical meaning. The pH may be determined by means of the Duboscq colorimeter, using quinaldine red
as an indicator. The centrifuged gastric contents are measured and an equal measure of distilled water taken as a standard. The same amount of indicator is added to each. The percentage dissociation is determined by the percentage color. The pH is read from the following table:
Get full access to this article
View all access options for this article.