3230a.     SOBCOV, H.  Analysis of Liquid Hydrocarbon Mixture by Mass Spectrometry.  Anal. Chem., vol. 24, 1952, pp. 1386-1388; Chem. Abs., vol. 47, 1953, p. 298.

          Application of matrices and IBM techniques is discussed in the analysis of hydrocarbon mixtures b. 82°-231° F. (isopentane to toluene.)  Problems of mass spectrometer reproducibility and close spectral similarities require fractionation of the same by distillation.  The smallest number of fractions required seems to be 4 and the largest useful matrix is of the 15^th order.  Many of the observations from this study are general enough to be applicable to other problems in mass spectrometry.