2022

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Qualitative and quantitative analysis of Sulphur element in Pakistani rice by calibration free laser induced breakdown spectroscopy (LIBS)
(UMT, Lahore, 2022) ZEESHAN YOUNAS
Laser induced breakdown spectroscopy is being used as rapid, non-destructive in-situ technique equally reliable for compositional analysis for metals and non-metals. In this work a 1064nm Nd:YAG laser was used for the calibration free LIBS. Three samples of the rice were used for the qualitative and quantitative analysis for Sulphur element. Sample-1 was analysed under vacuum and other were determined in the presence of Ar gas filled in the chamber for the confinement of plasma signature. After the identification of Sulphur peaked lines according to NIST (National Institute of Science and Technology) was used for data according to our desired conditions. Plasma properties (Temperature and Density) were calculated and temperature was almost same for all the samples but the density of electrons vary for sample to sample plus for ionized and neutral atoms of Sulphur. Our main concern was to check the permissible value of Sulphur in rice, which then quantified and surprisingly all were above the acceptable value (2ppm) in food. LIBS with a coupled with a suitable medical and agricultural analysing techniques would be more beneficial for the compositional analysis and recommendations in the field of health and agriculture.