TITLE:
Quantification of Solid Residues by Raman Spectroscopy
AUTHORS:
Esau Araiza-Reyna, Roberto Sato-Berrú, América Vázquez-Olmos
KEYWORDS:
Quantitative Raman; Aminoacids; Glycine; Solid residues; Drop Coating Deposition Raman; Principal Component Analysis
JOURNAL NAME:
Optics and Photonics Journal,
Vol.3 No.5A,
August
27,
2013
ABSTRACT:
We suggest a mathematical route which has the capability
to obtain quantitative information of solid residues on a substrate of aluminum, in which
the evaporation of the deposited micro-drops has the form of coffee
rings. In this job, the glycine aminoacid was used as probe molecule. We
suppose that the number of moles present on the study sample is proportional to
the Raman signal and to the experimental parameters of the used Raman system.
Then, the mass and the number of molecules can be determined with these data.
We showed that the mathematical expression is simple and elegant for its
implementation. On the other hand, we have applied and demonstrated that the
technique of principal component analysis (PCA) can be used to obtain
quantitative information of the sample. Our results show quantitative analysis
of glycine residues between 10-11 to 10-15 g.