Optical saturation, diffusion and convection effects in thermal lens spectrometry

Autor:	E. F. Simó Alfonso, Y.Martin Biosca, Guillermo Ramis-Ramos, J. J. Baeza Baeza, J. S. Esteve Romero
Rok vydání:	1995
Předmět:	Convection Molecular diffusion education.field_of_study Chemistry Population Analytical chemistry Chromophore Biochemistry Molecular physics Analytical Chemistry Excited state Thermal Environmental Chemistry Saturation (chemistry) Ground state education Spectroscopy
Zdroj:	Analytica Chimica Acta. 307:145-154
ISSN:	0003-2670
DOI:	10.1016/0003-2670(95)00041-w
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7eebf165db724a72acce3928f1badf6 https://doi.org/10.1016/0003-2670(95)00041-w Zobrazit plný text záznamu Full Text from ScienceDirect