Concentration (PPM) UV-A(2.0 mW/ cm2) UV-B(0.5 mW/ cm2) Sunlight
25 0.170 0.159 0.197
50 0.455 0.309 0.437
75 0.690 0.384 0.424
100 0.511 0.360 0.097
Table 3: Generation of superoxide in benzopyrene on exposing in UV-A, UV-B, and Sunlight for 20mins.
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