foam stability test

foam sta·bil·i·ty test

a test for fetal pulmonary maturity, determined by the ability of pulmonary surfactant in amniotic fluid to generate stable foam in the presence of ethanol after mechanical agitation.
Synonym(s): shake test
References in periodicals archive ?
The cleansing composition has an improved average foam stability ranging between 35-60mm according to the foam stability test, wherein the ratio of surface-active agent to oil is in the range of 1:0.