5.1.3.2 Iso-octane, of 95% purity or better. (Warning—
Extremely flammable. Harmful if inhaled. Vapors may cause
fire.)
5.2 Solvent Blank—The water content of the solvent shall
be determined by distilling an equivalent amount of the same
solvent used for the test sample in the distillation apparatus and
testing as outlined in Section 9. The blank shall be determined
to the nearest scale division and used to correct the volume of
water in the trap in Section 10.