FTM 3720 (FED-STD-791 Method 3720) Molybdenum Disulfide Content of Lubricating Grease
Molybdenum disulfide is a dark grey solid with excellent lubricity properties used as a solid lubricant or as a grease additive. This method determines the percent of molybdenum disulfide in soap-thickened greases which do not contain other solid additives. In such cases, analysis by ICP (ASM D7303) may be preferable. For non-soap thickened greases see FTM 3722. For MoS2 powder purity of see FTM 3710.
The sample is placed in an Erlenmeyer flask, hexane-oleic acid solvent is added and the flask is heated and stirred to achieve a smooth mixture. The mixture is filtered, the solids are dried and weighed. The percent MoS2 is reported.