Elemental Analysis of Kohl Using Laser Ablation and Atomic Absorption Spectroscopy (AAS) techniques

We report the spectroscopic studies of the Kohl plasma produced in air at atmospheric pressure by Laser Induced Breakdown Spectroscopy (LIBS) and Atomic Absorption Spectroscopy (AAS) techniques. The plasma has been produce using Q-switched Nd:YAG laser at Second Harmonic Generation SHG (532 nm), with laser irradiance of 4 x 1010 W/cm2, 10 Hz repetition rate and 5ns pulse duration. From the spectroscopic analysis of the registered spectrum, we have detected the presence of Pb, C, Ca, Cr, Fe, Ba, Zn, Hg, Na and H. The electron temperature has been determined from the intensity ratio of the two transition lines of Pb- I, 368.34 nm and 373.99 nm, whereas the electron number density has been estimated from the Stark broadening profile of the H alpha line at 656.28 nm. It has been noticed that the maximum value of the electron temperature and electron number density at the initial stage of the plasma. The electron temperature varies as (15500-11600) K and the number density varies as (2.06 x 1017-3.62 x 1016) cm-3 with the delay time of (1-6) mu s.

Automated summary

The study investigated the spectroscopic properties of Kohl plasma produced in air at atmospheric pressure using Laser Induced Breakdown Spectroscopy (LIBS) and Atomic Absorption Spectroscopy (AAS) techniques. Various elements were detected in the plasma, and the electron temperature and number density were determined from the spectral analysis. The maximum values of electron temperature and electron number density were observed at the initial stage of the plasma, with variations observed with delay time.