Table 4.

Summary of achieved models.

Model for	a	b 1∗x 1	b 2∗x 2	b 3∗x 3
original UV absorbance spectra at 294 nm (UVa_1WL)	−2.28	51.69∗A294
original UV absorbance spectra at 294 and 312 nm (UVa_2WL)	−1.67	60.56∗A294	−60.75∗A312
original UV absorbance spectra at 294, 312 and 266 nm (UVa_3WL)	−1.55	75.38∗A294	−62.27∗A312	–7.36∗A266
derivative spectra at 300 nm (UVd_1WL)	−1.44	−1038.84∗D300
derivative spectra at 300 and 270 nm (UVd_2WL)	−2.12	−1111.09∗D300	128.67∗D270
derivative spectra at 300, 270 and 222 nm (UVd_3WL)	−3.56	−1128.73∗D300	120.74∗D270	−32.54∗D222