Parameter Control Treated     T1 T2 T3 T4 Peak Intensity at m/z= (PM) 100 100 100 100 100 Peak Intensity at m/z= (PM+1) 18.36 13.54 22.70 12.81 69.51 Percent Change of Isotopic abundance in (PM+1)/PM   -26.25 23.63 -30.22 278.59

Table 3: GC-MS isotopic abundance analysis result of carbazole.