Figure 1

A and B UV-absorbance spectra of tested xenobiotic compounds. A) in pure water at 10 mg L^-1. Absorbance maxima are given in Table 1. B) Calibration curves of BTri, 4- and 5-TTri, TTri and SMX in pure water. Concentrations were 1.0, 5.0, 10.0, 15.0 and 20.0 mg L^-1. Absorbance was measured at 257 nm (SMX) and 262 nm (benzotriazoles). Mean values (n = 3) are shown, standard deviations too small to be shown (below 1%). Solid lines were fitted by a linear function with R² values being >0.99.