Some observations on the determination of soap in refined oil

Recovery experiments which were made by two quite different procedures indicate that the most satisfactory approach to a solution of the problem of determining the soap content of a refined oil probably rests upon the assumption that the chloride which is formed upon the addition of hydrochloric acid is an index of the quantity present. At soap concentrations of 100 pts/M² and less, the Durst method, as modified by Stillman, was found to be quantitative for all practical purposes.     

Determination of air content in dry shortenings

A method of test is described for the determination of dry shortening air content. Liquid mediums are prepared which have identical specific gravity to that of the shortening which is under test. Simple calculation of specific gravity data gives the air content. A distinct advantage to the method lies in the fact that air content can be determined for any shortening sample size.