Quantitative NIR Raman analysis in liquid mixtures.
The capability to obtain quantitative information of a simple way from Raman spectra is a subject of considerable interest. In this work, this is demonstrated for mixtures of ethanol with water and rhodamine-6G (R-6G) with methanol, which were analyzed directly in glass vessel. The Raman intensities and a simple mathematical model have been used and applied for the analysis of liquid samples. It is starting point to generate a general expression, from the experimental spectra, as the sum of the particular expression for each pure compound allow us to obtain an expression for the mixtures which can be used for determining concentrations, from the Raman spectrum, of the mixture.
Sato-Berrú
R Ysacc
RY
Centro de Investigaciones en Optica, A.C., Unidad Aguascalientes, Prolongación Constitución 607, Reserva Loma Bonita, C.P. 20200, Aguascalientes, Mexico. roys_la@yahoo.com
Medina-Valtierra
Jorge
J
Medina-Gutiérrez
Cirilo
C
Frausto-Reyes
Claudio
C
D000431:Ethanol / Q000032:analysis; D000432:Methanol / Q000032:analysis; D008962:Models, Theoretical; D012235:Rhodamines / Q000032:analysis; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman; D014867:Water / Q000032:analysis
D012235:Rhodamines; C026188:rhodamine 6G; D014867:Water; D000431:Ethanol; D000432:Methanol