2514.     OHTSUKA, H., AND TOMITA, N.  Analysis of Synthetic Gasoline Obtained by Fischer Process.  Jour. Soc. Chem. Ind. (Japan), vol. 44, 1941, pp. 746-747; Chem. Abs., vol. 42, 1948, p. 2080.

        If the material is found by hydrogenation to contain no aromatic hydrocarbons, the following short procedure of the analysis gives a result accurate enough.  Fractionate the sample into 4 portions:  (A) boiling up to 65°, (B) 65°-105°, (C) 105°-140°, (D) 140° to dry point.  Wash each fraction with 2 vol. 87% H₂SO₄, and in fractions (A) and (B) consider the loss as unsaturated hydrocarbons and the remainder as saturated.  In fractions (C) and (D), wash the remaining portion with 3 vol. 99% H₂SO₄, and consider the final remainder as saturated hydrocarbons, and the balance as unsaturated.