This work presents a laser spectroscopy based method to detect very small amounts of acidic molecules in concentrations down to 10 ppm. The proposed method relies on the sensitivity to acids of a fluorescent dye, which is used as the active material in a stimulated laser emission experiment. Using a cuvette, that works as a resonator, laser emission from a dye doped mixture can be observed. When an acidic species is added to the mixture, due to the solvatochromic effect, the spectral position of fluorescence shifts and, consequently, a shift in the emitted laser wavelength is observed. From the analysis of the laser lines the presence of a specific acid species and its concentration can be determined.
A laser spectroscopy based method for the detection of acidic compounds in solution
DE SANTO, Maria Penelope
Membro del Collaboration Group
;BARBERI, Riccardo CristoforoMembro del Collaboration Group
2017-01-01
Abstract
This work presents a laser spectroscopy based method to detect very small amounts of acidic molecules in concentrations down to 10 ppm. The proposed method relies on the sensitivity to acids of a fluorescent dye, which is used as the active material in a stimulated laser emission experiment. Using a cuvette, that works as a resonator, laser emission from a dye doped mixture can be observed. When an acidic species is added to the mixture, due to the solvatochromic effect, the spectral position of fluorescence shifts and, consequently, a shift in the emitted laser wavelength is observed. From the analysis of the laser lines the presence of a specific acid species and its concentration can be determined.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
