Using Absorption Spectroscopy for Density Determination

Biomedically relevant species can be utilized in custom compositions for medical, industrial or agricultural applications. Studying H2O2 densities with cavity ring-down spectroscopy enables a broader range of applications for plasma jets.


Researchers have developed and demonstrated a new diagnostic technique for obtaining local distribution of gas phase hydrogen peroxide (H2O2) in plasma jets. Continuous-wave cavity ringdown spectroscopy, with a quantum cascade laser at a wavelength of 8.12 μm, is used to determine the effective absorption length of a cold atmospheric pressure plasma jet and to determine the localized density of H2O2 in the effluent of the plasma jet.

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