Chemical aerosol Raman detector
| Autor: | G. K. Kilper, B. G. Perkins, L. W. Farrar, D. W. Sickenberger, F. M. D’Amico, S. Di Cecca, M. L. Clark, Steven D. Christesen, Erik D. Emmons, Thomas H. Jeys, Roshan L. Aggarwal, Richard J. Kreis, M. Amin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Materials science 010504 meteorology & atmospheric sciences 010308 nuclear & particles physics business.industry Detector Analytical chemistry Isovanillin Concentrator 01 natural sciences Aerosol chemistry.chemical_compound symbols.namesake Optics chemistry 0103 physical sciences symbols Molecule business Raman spectroscopy Instrumentation Sensitivity (electronics) 0105 earth and related environmental sciences |
| Zdroj: | The Review of scientific instruments. 88(3) |
| ISSN: | 1089-7623 |
| Popis: | A sensitive chemical aerosol Raman detector (CARD) has been developed for the trace detection and identification of chemical particles in the ambient atmosphere. CARD includes an improved aerosol concentrator with a concentration factor of about 40 and a CCD camera for improved detection sensitivity. Aerosolized isovanillin, which is relatively safe, has been used to characterize the performance of the CARD. The limit of detection (SNR = 10) for isovanillin in 15 s has been determined to be 1.6 pg/cm3, which corresponds to 6.3 × 109 molecules/cm3 or 0.26 ppb. While less sensitive, CARD can also detect gases. This paper provides a more detailed description of the CARD hardware and detection algorithm than has previously been published. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|