Multivariate comparison of elemental concentrations in human teeth |
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| Authors: | C Oprea PJ Szalanski MV Gustova IA Oprea V Buzguta |
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| Institution: | aJoint Institute for Nuclear Research (JINR), Frank Laboratory of Neutron Physics (FLNP), Departament of Experimental Nuclear Physics, 141980 Dubna, Russian Federation;bLodz University, Faculty of Physics and Applied Informatics, Lodz, Poland;cUniversity of Oradea, Faculty of Sciences, 3700 Oradea, Romania |
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| Abstract: | R-mode factor analysis was applied to characterize the chemical composition of human teeth investigated by particle induced X-ray emission (PIXE), Rutherford backscattering spectrometry (RBS) and X-ray fluorescence (XRF) techniques. The approach developed in this study enabled the separation between essential mineral teeth components and the pollutants deposited in teeth tissues during the human life. The three independent sources of metals incorporated in human teeth were found. The first source, representing about 43% of the variance of the concentration data, was characterized by pollutant elements of power industry emissions. The second factor was loaded with toxic elements of general urban pollution. The third factor represented the tooth source as it contained mainly large fractions of the mineral components of the tooth tissue as Ca and K. |
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| Keywords: | Human teeth Analytical methods Elemental concentration Statistical analysis R-mode factor analysis |
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