| Abdul Jabbar,Mahmood Akhtar,Arslan Ali,Shaukat Mehmood,Sidra Iftikhar,and Muhmmad Aslam Baig.Elemental composition of rice using calibration free laser induced breakdown spectroscopy[J].Optoelectronics Letters,2019,15(1):57-63 |
| Elemental composition of rice using calibration free laser induced breakdown spectroscopy |
| Author Name | Affiliation | | Abdul Jabbar | Department of Physics, Mirpur University of Science and Technology, Mirpur 10250 AJK, Pakistan | | Mahmood Akhtar | Department of Physics, Mirpur University of Science and Technology, Mirpur 10250 AJK, Pakistan | | Arslan Ali | Department of Physics, Mirpur University of Science and Technology, Mirpur 10250 AJK, Pakistan | | Shaukat Mehmood | Department of Physics, Mirpur University of Science and Technology, Mirpur 10250 AJK, Pakistan | | Sidra Iftikhar | Department of Physics, Mirpur University of Science and Technology, Mirpur 10250 AJK, Pakistan | | and Muhmmad Aslam Baig | National Centre for Physics, Islamabad 45320, Pakistan |
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| Abstract: |
| In this paper, we apply laser induce breakdown spectroscopy (LIBS) to determine the elemental composition of different parts (root, stem and seed) of the rice plant and determine their weighted concentration using calibration free laser induced breakdown spectroscopy (CF-LIBS) technique. Ca, Fe and K are identified as major elements, while C, Ti, Mg, Si, Li, Ba, Sr, Cr, Na and Al as minor elements. We also detect the H-alpha line of hydrogen in the spectrum and determine the electron number density. The electron number density and its behavior as a function of laser energy, laser wavelength and the detector position are investigated. The plasma temperatures of samples are determined, and the validity of the assumption of the local thermodynamic equilibrium (LTE) is discussed. |
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