A new technique for determining critical micelle concentrations of surfactants and oil dispersants via UV absorbance of pyrene

- A more robust UV-based method is proposed for measuring CMCs with pyrene as a probe.
- The new method overcomes the limitation of baseline fluctuation of the UV-spectra.
- Red shift of the maximum UV absorbance of pyrene indicates formation of micelles.
- Maximum measurable peak difference is a reliable parameter to determine CMC.
- A UV-based method is used to calculate the pyrene/surfactant ratio in micelles.