Study on Consistency of Diagnostic Ratios of Different Oils

Using GC/MS analysis means, distribution of n-alkanes, PAHs, and biomarkers and consistency of diagnostic ratios of different kinds of oil were studied. The results indicate that: (1) Some diagnostic ratios of different oils are not obviously different and may even be consistent. These diagnostic ratios include two n-alkanes diagnostic ratios ((C19+C20)/(C19~C22) and CPI), four terpanes diag…