Figure 3.

Dependence of the absorbance and the integrated absorbance from the concentration. a) Absorbance at 1700 cm⁻¹, b) integrated absorbance from 100–3000 cm⁻¹, c) absorbance at 60000 cm⁻¹, d) integrated absorbance between 30000 and 100000 cm⁻¹. d=1 micron for a) and b) and d=0.01 micron for c) and d).