Detection and quantification of multiple molecular species in mainstream cigarette smoke by continuous-wave terahertz spectroscopy.
Continuous-wave terahertz spectroscopy by photomixing is applied to the analysis of mainstream cigarette smoke. Using the wide tunability of the source, spectral signatures of hydrogen cyanide (HCN), carbon monoxide (CO), formaldehyde (H2CO), and water (H2O) have been observed from 500 to 2400 GHz. The fine spectral purity allows direct concentration measurement from the pure rotational transitions of HCN and CO. The quantification of the measurement was validated by the means of a calibration gas containing CO. The potential of this technique for trace gas detection is demonstrated with an estimated detection limit of HCN equal to 9 parts in 10(6).
Bigourd
Damien
D
Laboaratoire de Physico-Chimie de l'Atmosphère CNRS UMR 8101, Université du Littoral Côte d'Opale, 189 Avenue Maurice Schumann, 59140 Dunkerque, France.
Cuisset
Arnaud
A
Hindle
Francis
F
Matton
Sophie
S
Fertein
Eric
E
Bocquet
Robin
R
Mouret
Gaël
G
D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D008872:Microwaves; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012906:Smoke / Q000032:analysis*; D013057:Spectrum Analysis / Q000379:methods*; D014026:Nicotiana / Q000737:chemistry*; D014028:Tobacco Smoke Pollution / Q000032:analysis*
D000393:Air Pollutants; D012906:Smoke; D014028:Tobacco Smoke Pollution