On time analysis of archaeological residues by using laser-induced breakdown spectroscopy(LIBS)

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, Türkiye

Tezin Onay Tarihi: 2016

Öğrenci: EFE KÜÇÜKKESKİN

Danışman: BURAK YEDİERLER

Özet:

In this study, Laser-Induced Breakdown Spectroscopy (LIBS) was applied to the archaeological rock samples. The main aim of this study is to find out the LIBS spectra of these rock samples and analyze them qualitatively and quantitatively. It was determined as a result of the qualitative analyses that the elements Mg (I) (517 nm), Sr (II) (421 nm) and Cr (I) (428 nm) exist in the archaeological materials. This information was proved not only with the related software program but also comparing our results with the National Institute of Standards and Technology (NIST) database. Moreover, the limit of detection (LOD) values of the elements Mg, Sr and Cr were calculated as 0.02, 0.38 and 1.34 in the unit of mg/kg or ppm respectively and these very low LOD values showed that using LIBS on the rock samples was suitable method. In the quantitative analyses, the calibration curves of these detected elements were constructed to see whether there is a linear fitting or not by observing the variation of the peak intensity or area under peak coming from the LIBS spectra depending on the concentration in the archaeological samples. The calibration technique using the OH emission band area to eliminate the matrix effects was found to be the best solution.