FED-STD-791 Lubricants, Liquid Fuels, And Related Products, Testing Method OfThis test method standard is composed of standard test methods for sampling, inspecting and testing lubricants, liquid fuels and related products. It is issued pursuant to the Federal Property and Administration Services Act of 1949, as amended and its application to the purchase of commodities referred to herein is mandatory on all Federal agencies.

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'�NOTE:This draft dated 15 April 2006' by DasH - Page 257 of 460

FED-STD-791D

Method 3722.2

September 30, 1986

MOLYBDENUM DISULFIDE CONTENT OF NON-SOAP

THICKENED LUBRICATING GREASES

1. SCOPE

1.1 This method is used to determine the MoS2 content of non-soap thickened

greases.

2. SUMMARY

2.1 The test consists essentially of extracting the base oil from the grease with

n-hexane and determining the molybdenum disulfide content of the remaining solids by

precipitation to sulfate with barium chloride.

3. SAMPLE SIZE

3.1 Approximately 5 g of grease to be tested.

4. REFERENCES, STANDARDS, AND APPARATUS

4.1 Desiccator.

4.2 Oven capable of 100�C.

4.3 Muffle furnace capable of 760�C.

4.4 Hotplate.

4.5 Steam bath.

4.6 Soxhlet extraction apparatus with 250-mL flask.

4.7 Beakers (2), 600 mL.

4.8 Crucibles (2), 50 mL.

4.9 Funnels (2).

4.10 Burner, Meker (or equivalent).

4.11 Policeman, rubber.

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