Patent ID: 8138482

Claim:
A process for evaluating a cleaning solution, comprising: subjecting a solution, including a solute and a solvent, to sonic energy to create a sonicated solution; measuring UV absorption of said sonicated solution to produce a sample UV absorbance spectra; obtaining a reference solution, which includes a solute concentration that is similar to that of solute concentration in said sonicated solution; measuring UV absorption of said reference solution to produce a reference UV absorbance spectra; scaling said reference UV absorbance spectra to said sample UV absorbance spectra at a lower range of said UV spectrum; subtracting from said reference UV absorbance spectra said sample UV absorbance spectra to produce a differential UV spectra; and evaluating at or near a peak of said sample UV absorbance spectra said differential UV absorbance spectra to determine whether said sonicated solution is activated.