ASTM D3634 Standard Test Method for Trace Chloride Ion in Engine Coolants
7. Hazards
7.1 Chromic Acid - Highly toxic; cancer suspect agent; corrosive; avoid skin contact.
7.2 Acetone - Extremely flammable; harmful if swallowed or inhaled; causes irritation.
7.3 Acetic Acid, Glacial - Poison, causes severe burns; combustible; harmful if swallowed or inhaled.
7.4 Hydrogen Peroxide Solution - Strong oxidizer; contact with other material may cause fire; causes severe burns. Do not tightly stopper containers. For further details, see MCA Chemical Safety Data Sheet SD-53.
7.5 Silver Nitrate - May be fatal if swallowed; causes severe burns.
7.6 Sodium Hydroxide Solution - Causes severe burns to skin and eyes.
8. Sampling
8.1 Sampling of engine coolant should be carried out in accordance with Practice D1176.
9. Preparation of Titration Solvent
9.1 Determine a titration blank on a full 2.3-kg bottle of glacial acetic acid by titrating 100 mL potentiometrically with 0.01 N AgNO3 solution. If the blank is more than 0.2 mL of 0.01 N AgNO3 solution, reject the bottle. If the blank is less than 0.05 mL of titrant, add an amount of the KCl solution (1 mL maximum) to the glacial acetic acid remaining in the bottle (about 2300 mL) to give an approximately 0.1-mL titration for 100 mL of the acetic acid. Determine the blank on exactly 100 mL of this titration solvent in duplicate. The values should not differ by more than 0.02 mL. Reserve the supply of solvent for this test method and recheck the blank occasionally.
