Figure 2.

Photochemical degradation kinetic plots for 2-(trifluoromethyl)phenol (model compound 1a) with photolysis (filled shapes) and dark controls (equivalent hollow shapes) in (a) pH 5 buffer (black squares), (b) pH 7 buffer (black circles) and pH 7 buffer with 1 mM H₂O₂ (red triangles), and (c) pH 10 buffer (black inverted triangles) and pH 10 buffer with 0.5 mM sulfite (blue diamonds). The photolysis rate constants calculated from the slopes are 3.52 ± 0.07 h^–1 for pH 5, 26.4 ± 0.64 h^–1 for pH 7, 29.99 ± 1.47 h^–1 for H₂O₂, 334.1 ± 93.45 h^–1 for pH 10, and 422.4 ± 9.38 h^–1 for sulfite. Error bars represent the standard deviation of triplicate samples. Reported rate constant errors represent the average 95% confidence interval determined by regression statistics. Note the change in scales/units along both the x- and y-axes.