Molecular Marker Study of Particulate Organic Matter in Southern Ontario Air

Figure 3

Scatter plot of ,-hopane (abHp) concentration versus trisnorhopane (TrisHp) concentration in PM₁₀ collected at three different locations. The figure is in logarithm scale, and the inset is in expanded linear scale. The linear regression slopes for the Hamilton, Simcoe, and York Gateway Tunnel samples are 2.6 ± 0.1 ( = 0.884), 0.89 ± 0.09 ( = −0.579), and 2.7 ± 0.1 ( = 0.953), respectively. Dotted lines shown in the inset are y = x and y = 0.5x, corresponding to the highest and the lowest ratios of ,-hopane emission rate to trisnorhopane emission rate for coal combustions studied [19]. Error bars shown are standard errors estimated from the replicate measurements.