FED-STD-791D
4.10 Tongs, stainless-steel.
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 and measures, and spill practices of each chemical are explained.
5.2 Distilled water.
5.3 Alcohol, isopropyl (TT-I-735) [1,3,0].
5.4 Petroleum ether (O-E-751) [1,4,0].
5.5 Detergent, water-soluble, commercial.
5.6 Cleaning solution, glass (concentrated sulfuric acid [3,0,2] saturated with potassium
or sodium dichromate [1,0,1], technical grade).
5.7 Tape, transparent, pressure-sensitive.
5.8 Filters, cellulose membrane, 0.45 0.02 m pores, 4.7-cm diameter, white, 0.308-cm
grid, capable of filtering 200 mL of distilled water per square cm per minute at 69 kPa (10 psi)
differential pressure and at 25C. (Available from Millipore Corp., Gelman Instrument Co., or
Decontamination, Inc.)
6. PROCEDURE
6.1 Clean the filter flask, filter holder, graduated funnel cover, and three sample bottles
and stoppers as follows:
6.1.1 Wash in hot tap water and detergent.
6.1.2 Rinse with tap water.
6.1.3 Soak in hot glass-cleaning solution until clean.
6.1.4 Rinse with tap water.
6.1.5 Rinse with distilled water.
6.2 Prepare filter solvents as follows:
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