masterThesis
Estudo da potencialidade da espectroscopia de infravermelho próximo na análise de cabelo utilizando ferramentas quimiométricas para diferenciar fumantes de não fumantes
Fecha
2013-07-23Registro en:
LIMA, Leomir Aires Silva de. Estudo da potencialidade da espectroscopia de infravermelho próximo na análise de cabelo utilizando ferramentas quimiométricas para diferenciar fumantes de não fumantes. 2013. 44 f. Dissertação (Mestrado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2013.
Autor
Lima, Leomir Aires Silva de
Resumen
This paper investigates the potential of near infrared spectroscopy (NIR) for forensic
analysis of human hair samples in order to differentiate smokers from nonsmokers, using
chemometric modeling as an analytical tool. We obtained a total of 19 hair samples, 9 smokers
and 10 nonsmokers varying gender, hair color, age and duration of smoking, all collected
directly from the head of the same great Natal-RN. From the NIR spectra obtained without any
pretreatment of the samples was performed an exploratory multivariate chemical data by
applying spectral pretreatments followed by principal component analysis (PCA). After
chemometric modeling of the data was achieved without any experimental data beyond the NIR
spectra, differentiate smokers from nonsmokers, by demonstrating the significant influence of
tabacco on the chemical composition of hair as well as the potential of the methodology in
forensic identification