Gasoline or kerosene modifired by fire was identified by gas chromatography (GC). The identification was tried by multivariate analysis using a personal computer.
The method of identification is as follows: Gasoline and kerosene are modified by heating or burning at regular time intervals and analyzed by GC. The area ratios of definite 20 peakes are caluculated and stocked as fundamental data. The sample is analyzed by GC. The specific peak area ratios of gasoline or kerosene are not changed out in spite of heating or burning and are used for the identification of gasoline or kerosene. The area ratios of definite peaks are calculated and compared with fundmental data. The comparision between sample data and fundmental data are carried out by clustering analysis, discriminant analysis, principal component analysis and factor analysis. The identification of a sample as gasoline or kerosene is determined by specific peak area ratios and discriminant function. The degree of modification of sample is determined by cluster distance, principal component score, and factor score. If sample does not coincide with gasoline or kerosene, it is pointed out by discriminant function, principal component, and factor score.
View full abstract