Calibration Of Paint And Varnish Properties: Potentialities Using X-ray Spectroscopy And Partial Least Squares

This work presents a method for multivariate calibration of the properties of varnishes and paints, combining X-ray Spectroscopy (XRS) with Partial Least Squares (PLS) data treatment. The potential calibrated property for varnishes was density (calibrated values raging from 0.88 to 0.92 g cm- 3 and absolute errors from 0.0014 to 0.055 g cm- 3). For paints, the potential calibrated property was Stormer viscosity (calibrated values ranging from 72 to 89 KU and absolute errors from 0.4 to 8 KU). The information here presented was also promoted by the influence of Compton and Rayleigh effects observed in X-ray spectra. X-ray fluorescence spectra were obtained using an ED- XRF system equipped with a Rh target X-ray tube. The importance of the X-ray scattering region (from 18.00 to 24.00 keV), where Compton and Rayleigh effects occur, were evidenced by the best PLS models and lower error values. With the PLS method and X-ray spectra it was also possible to calibrate the content % (m/m) of two organic elements, C and H. It is important to highlight that the proposed analytical method permitted to save time in the quality control of the studied samples, reducing the generation of residues. © 2008 Elsevier B.V. All rights reserved.922131137Chiavari, G., Prati, S., Analytical pyrolysis as diagnostic toll in the investigation of works of art (2003) Chromatographia, 58, pp. 543-554White, R.E., Thomas, P.S., Phillips, M.R., Wuhrer, R., A DSC study of the effect of lead pigments on the drying of cold pressed linseed oil (2005) J. Therm. Anal. Calorim., 80, pp. 237-239Spyros, A., Anglos, D., Study aging in oil paintings by 1D and 2D NMR spectroscopy (2004) Anal. Chem., 76, pp. 4929-4936Santos, D., Costa, M.R., Santos, M.T., Performance of polyester and modified polyester coil coatings exposed in different environments with high UV radiation (2007) Prog. Org. Coat., 58, pp. 296-302Hvilsted, S., Analysis of emulsion paints (1985) Prog. Org. Coat., 13, pp. 253-271Potts, P.J., Ellis, A.T., Kregsamer, P., Streli, C., Vanhoof, C., West, M., Wobrauschek, P., Atomic spectrometry update - X-ray fluorescence spectrometry (2006) J. Anal. At. Spectrom., 21, pp. 1076-1107(2004) X-ray Spectrometry: Recent Technological Advances, , Tsuji K., Injuk J., and Van Grieken R. (Eds), John Wiley & Sons, ChichesterEchard, J.-P., In situ multi-element analyses by energy-dispersive X-ray fluorescence on varnishes of historical violins (2004) Spectrochim. Acta Part B, 59, pp. 1663-1667Janssens, K., Vittiglio, G., Deraedt, I., Aerts, A., Vekemans, B., Vincze, L., Wei, F., Snigirev, A., Use of microscopic XRF for non-destructive analysis in art and archaeometry (2000) X-Ray Spectrom., 29, pp. 73-91Hou, X., He, Y., Jones, B.T., Recent advances in portable X-ray fluorescence spectrometry (2004) Appl. Spectrosc. Rev., 39, pp. 1-25Carriveau, G.W., Shekkey, M., A study of Rembrandt drawings using X-ray fluorescence (1982) Nucl. Instrum. Meth., 193, pp. 297-301Martens, C.R., (1968) Technology of Paints, Varnishes and Lacques, , Reinhold Book, New YorkVerbi, F.M., Pereira-Filho, E.R., Bueno, M.I.M.S., Use of X-ray scattering for studies with organic compounds: a case study using paints (2005) Microchim. Acta, 150, pp. 131-136Van Gysel, M., Lemberge, P., Van Espen, P.J., Description of Compton peaks in energy-dispersive X-ray fluorescence spectra (2003) X-Ray Spectrom., 32, pp. 139-147Vincze, L., Vekemans, B., Jannsens, K., Adams, F., Modeling of photon scattering at high X-ray energies: experiment versus simulation (1999) J. Anal. At. Spectrom., 14, pp. 529-533Pratt, R.H., Tutorial on fundamentals of radiation physics: interactions of photons with matter (2004) Radiat. Phys. Chem., 70, pp. 595-603Hubbell, J.H., Summary of existing information on the incoherent scattering of photons, particularly on the validity of the use of the incoherent scattering function (1997) Radiat. Phys. Chem., 50, pp. 113-124Compton, A.H., The spectrum of scattered X-rays (1923) Phys. Rev., 22, pp. 409-413Chatterjee, B.K., LaJohn, L.A., Roy, S.C., Investigations on Compton scattering: new directions (2006) Radiat. Phys. Chem., 75, pp. 2165-2173Geladi, P., Kowalski, B.R., Partial least-squares regression: a tutorial (1986) Anal. Chim. Acta, 185, pp. 1-17Geladi, P., Chemometrics in spectroscopy Part 1. classical chemometrics (2003) Spectrochim. Acta Part B, 58, pp. 767-782Geladi, P., Sethson, B., Nyström, J., Lilhonga, T., Lestander, T., Burger, J., Chemometrics in spectroscopy Part 2. examples (2004) Spectrochim. Acta Part B, 59, pp. 1347-1357Martens, H., Naes, T., (1993) Multivariate Calibration, , John Wiley & Sons, ChichesterBraga, J.W.B., Poppi, R.J., Figures of merit for the determination of the polymorphic purity of carbamazepine by infrared spectroscopy and multivariate calibration (2004) J. Pharm. Sci., 93, pp. 2124-2134Dwiggins Jr., C.W., Quantitative determination of low atomic number elements using intensity ratio of coherent to incoherent scattering of X-rays (1961) Anal. Chem., 33, pp. 67-7