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 102 of 460

FED-STD-791D

Method 3013

September 30, 1986

DETERMINATION OF PARTICULATE CONTAMINATION IN SYNTHETIC TURBINE

ENGINE LUBRICANTS

1. SCOPE

1.1 This method describes a gravimetric procedure for the determination of particulate

contamination in synthetic turbine engine lubricating oils.

2. SUMMARY

2.1 A known volume of oil is filtered through a pre-weighed membrane filter. The

increase in filter weight is determined after washing and drying and is considered particulate

contaminant. Particulate contaminant per liter of oil is calculated from the volume of oil filtered

and the weight of particulate contaminant.

3. SAMPLE

3.1 Approximately 1 L of the oil to be tested.

4. REFERENCES, STANDARDS, AND APPARATUS

4.1 Membrane filters, 4.7 cm diameter, absolute pore size of 3 �m and 0.45 �m. Filters

must be compatible with the required reagents and with MIL-PRF-7808 lubricants at elevated

temperatures. Millipore MF filters or equivalent shall be used.

4.2 Filter holder, 4.7 cm diameter.

4.3 Analytical balance, sensitivity 0.1 mg.

4.4 Petri dishes, 10.0 cm diameter with covers.

4.5 Oven, non-circulatory air, capable of maintaining temperature of 90�C.

4.6 Forceps, flat-bladed without serrated tips.

4.7 Vacuum system, 62.5 cm Hg or better.

4.8 Laboratory wash bottle.

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