Abstract

Time-resolved spectra of neutral and ionized atomic emissions from slag sample are measured by laser-induced breakdown spectroscopy (LIBS). Various factors affecting the calibration-free CF-LIBS method are carefully analyzed, and subsequently these factors are either avoided or corrected. Plasma temperature and electron density are calculated by Saha–Boltzmann plot and Stark broadening of Ca, respectively. At the same time, self-absorption and local thermodynamic equilibrium have been carefully studied. An automatic spectral lines elimination algorithm is applied to calculate plasma temperature and element concentration. The calculated element concentrations show marked changes with acquisition time increasing. Due to the influence of continuous spectrum at early times and self-absorption at late times, the large absolute errors sum is obtained in these two periods. The smallest absolute errors sum corresponds to the gate delay time 1.5 μs < td < 2 μs for our experimental setup.

© 2016 The Author(s)

Comparative study of calibration-free laser-induced breakdown spectroscopy methods for quantitative elemental analysis of quartz-bearing limestone

Muhammad Fahad, Zahid Farooq, and Muhammad Abrar
Appl. Opt. 58(13) 3501-3508 (2019)

Quantitative elemental analysis of steel using calibration-free laser-induced breakdown spectroscopy

M. L. Shah, A. K. Pulhani, G. P. Gupta, and B. M. Suri
Appl. Opt. 51(20) 4612-4621 (2012)

Feasibility of simultaneous multi-element analysis of quartz sand with impurities by calibration-free laser-induced breakdown spectroscopy and its potential for guiding glass manufacturing

Tengfei Sun, Shaoying Ke, Wentao Sui, Wenhao Zhang, Peng Lu, Dongfeng Qi, Bing Yang, Juan Wei, Yongling Wu, and Hongyu Zheng
Opt. Continuum 3(1) 59-70 (2024)

Elemental analysis of sage (herb) using calibration-free laser-induced breakdown spectroscopy

J. Iqbal, H. Asghar, S. K. H. Shah, M. Naeem, S. A. Abbasi, and R. Ali
Appl. Opt. 59(16) 4927-4932 (2020)

Quantitative analysis of Fuller’s earth using laser-induced breakdown spectroscopy and inductively coupled plasma/optical emission spectroscopy

I. Rehan, M. Z. Khan, K. Rehan, S. Sultana, M. U. Rehman, R. Muhammad, M. Ikram, and H. Anwar
Appl. Opt. 58(16) 4227-4233 (2019)