6533b862fe1ef96bd12c75e8

RESEARCH PRODUCT

Optical saturation, diffusion and convection effects in thermal lens spectrometry

E. F. Simó AlfonsoY.martin BioscaGuillermo Ramis-ramosJ. J. Baeza BaezaJ. S. Esteve Romero

subject

ConvectionMolecular diffusioneducation.field_of_studyChemistryPopulationAnalytical chemistryChromophoreBiochemistryMolecular physicsAnalytical ChemistryExcited stateThermalEnvironmental ChemistrySaturation (chemistry)Ground stateeducationSpectroscopy

description

Abstract In thermal lens spectrometry (TLS) the intense pump radiation can lead the chromophore to partial optical saturation conditions in which the ground state is depleted and the population of an intermediate excited state increases. A model in which the excitation process competes with both the decay processes and diffusion and convection of the species in the excited and ground states is developed. The model is used to explain the variations of the TLS/spectrophotometry sensitivity ratios found for a series of phthalein and azo dyes in aqueous media.

yearjournalcountryeditionlanguage
1995-05-01Analytica Chimica Acta
https://doi.org/10.1016/0003-2670(95)00041-w