Method for detecting or quantifying carbon black and/or black carbon particles
US11002679B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 12, 2017 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | Sep 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0697
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting the presence of or quantification of carbon black and/or black carbon in a sample or carrier medium. The method includes providing the sample or carrier medium without labelling or pre-treatment of the carbon black and/or black carbon particles; illuminating the sample or carrier medium at a temperature below 90° C. by a pulsed light with a pulse duration below 500 femtoseconds, a repetition rate above 1 MHz with an average power below 20 mW, and a wavelength of a femtosecond laser pulse ranging from 700 to 1200 nm, to generate non-incandescence related light emission from the carbon black and/or black carbon particles; and analysis of the light emission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.