FED-STD-791D
Method 3180.2
September 30, 1986
SULFUR IN CUTTING FLUIDS (ACTIVE AND TOTAL)
1. SCOPE
1.1 This method is used for the determination of active and total sulfur in cutting fluids.
It is used in conjunction with ASTM D 129.
2. SUMMARY
2.1 Total sulfur content of the fluid is determined in accordance with ASTM D 129 with
the noted exceptions. Active sulfur content is determined by first reacting the fluid with some
copper powder, determining the sulfur content of the reacted fluid and then subtracting this
sulfur content from the total sulfur content.
3. SAMPLE SIZE
3.1 Approximately 45 mL of the cutting fluid to be tested.
4. REFERENCES, STANDARDS, AND APPARATUS
4.1 Standards
4.1.1 ASTM Method D 129, Sulfur in Petroleum Products by the Bomb Method.
4.2 Beaker, lipless, tall-form, 250 mL capacity.
4.3 Auger stirrer blade, 1.0 cm wide and 7.5 cm high.
4.4 Thermometer, 177C (350F), range of 150 to 200C.
4.5 Bomb, minimum capacity 300 mL, electrically fired (see ASTM D 129).
4.6 Sample cup, platinum or nickel (see ASTM D 129).
5. MATERIALS
5.1 CAUTION - SOME MATERIALS ARE TOXIC AND HAZARDOUS. The
chemical materials listed in this section must be handled carefully. Federal Test Method 10000,
Material Handling Safety Precautions, is a reference which lists all toxic and hazardous materials
cited in FTMS 791. The synonyms, life hazard, flammability, handling and storage precautions,
emergency treatment.
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