ASTM D128 Analysis of Lubricating Grease
This test will analyze conventional greases consisting of petroleum oils and soaps for unsaponifiable matter, water, free alkalinity, free fatty acid, fat, glycerin, and insolubles.
A supplementary test will analyze greases which are insoluble in conventional solvents, contain non-petroleum fluids, and/or non-soap type thickeners.
Follow-up analysis of the separated components by other methods such as ICP metals or Infrared spectrograph may be requested.