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Al Neelian University (2017)

Characterization of Adansonia Digitata Using Laser Induced Breakdown Spectroscopy (LIBS)

Hala Mohammed Ali Mohammed

Titre : Characterization of Adansonia Digitata Using Laser Induced Breakdown Spectroscopy (LIBS)

Auteur Hala Mohammed Ali Mohammed

Université de soutenance : Al Neelian University

Grade : Master in laser physics and modern optics 2017

Résumé
Laser induced break down spectroscopy (LIBS) is a method of atomic emission spectroscopy (AES) that uses laser for plasma generation. It has been used as an analytical tool. This work aimed to utilize laser induced breakdown spectroscopy (LIBS) as a technique to characterize two samples of Adansonia Digitata (Baobab) collected from two different locations (southern Africa and Northern Kordofan state). Nitrogen pulse laser 337.1nm with 100, 200 and 400mj was used as irradiation source. It was focused on the sample till the formation of plasma with the emission of discrete lines. The emitted spectra were recorded using USB2000 spectrometer and then analyzed by the help of the atomic spectra database line of National Institute of Standard and Technology (NIST database) and the handbook of basic atomic spectroscopic data. The results of the analysis showed that sample (1) of Adansonia Digitata contains considerable amount of elements such as : Al, Ar, B, Be, C, Ca, Cr, Eu, Fe, Fr, Hf, Hg, In, Mn, N, Nd, O, P, Pr, Rh, Sc, Tb, Th, V, W, Xe. Some of heavy elements were found such as : Cr, Hg, Fe and Mn. Fe, Cr and Mn are considered to be beneficial if it is used with low concentrations while Hg is toxic. In contrast, the detected elements in sample (2) were : Al, Ag, Ar, B, Ba, C, Ce, Eu, Fe, Hg, Ho, Mn, N, Nd, Ne, Pu, Rb, Re, Rh, Sc, Si, Sr, Th, Ti, Tm, V, W and Xe. Set of heavy elements were also detected such as : Al, Ag, Hg, Mn, Rh, Ti and V. additionally, sample (1) of Adansonia Digitata is richer in its component (Fe, Cr, Mn and Ca) than sample (2). More studies to calculate the concentrations of the elements were suggested.

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Page publiée le 19 novembre 2018