Source and Ecological Risk Characteristics of PAHs in Sediments from Qinhuai River and Xuanwu Lake, Nanjing, China

Figure 3

Plot of seasonal isomeric ratios Ant/(Ant + Phe) versus BaA/(BaA + Chr) versus Fla/(Fla + Pry). A: autumn, W: winter, S: spring, and M: summer.