Evaluating a cleaning solution using UV absorbance
US8669532B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2012 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Feb 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/33
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for evaluating a cleaning solution is described. The process includes: (a) subjecting a solution, including a solute and a solvent, to sonic energy to create a sonicated solution; (b) measuring UV absorption of the sonicated solution to produce a sample UV absorbance spectra; (c) obtaining a reference UV absorbance spectra; (d) scaling the reference UV absorbance spectra to the sample UV absorbance spectra at a lower range of the UV spectrum; (e) subtracting from the reference UV absorbance spectra the sample UV absorbance spectra to produce a differential UV spectra; and (f) evaluating at or near a peak of the sample UV absorbance spectra the differential UV absorbance spectra to determine whether the sonicated solution is activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.