A Test to Determine Microquantities of Milkfat in Cleaning Solutions by Surface Film Displacement1

Abstract

Determining microquantities of soil is a major challenge in evaluating cleaning systems. A highly sensitive test was therefore developed to determine trace quantities of milkfat in cleaning solutions. It involved extraction of cleaning solution with organic solvents and subsequent determination of surface film displacement. The area displaced was directly related to the quantity of milkfat in the test solution with a correlation coefficient of 0.99. Usefulness of the test in evaluating cleaning systems has been shown in other research.