Determination of Lead and Chromium in Aloe Vera Pulp and Aloe Vera-Based Cosmetics by Laser-Induced Breakdown Spectroscopy (LIBS)

Irfan Qasim, Irfan Qasim (2020) Determination of Lead and Chromium in Aloe Vera Pulp and Aloe Vera-Based Cosmetics by Laser-Induced Breakdown Spectroscopy (LIBS). Determination of Lead and Chromium in Aloe Vera Pulp and Aloe Vera-Based Cosmetics by Laser-Induced Breakdown Spectroscopy (LIBS). ISSN 0003-2719

[img] Text (Paper available online)
Dr. Irfan Qasim- analytical letters article.pdf - Published Version
Download (2MB)

Abstract

This study focuses on the application of laser-induced breakdown spectroscopy (LIBS) to determine lead and chromium in pristine aloevera and aloe vera based beauty soaps using the second harmonic(532nm) of a Q-switched Nd:YAG laser. The optimal experimentalconditions were evaluated to improve the sensitivity of the detection
system by a parametric dependence study. The atomic transition lines at 405.7nm and 425.4nm were used as the analytical lines to determine lead and chromium, respectively. The LIBS system was calibrated for these toxic elements and the samples under analysis included 8.00–15.00 ppm by mass of lead and 5.00–12.00ppm by
mass of chromium, which are far above the safe permissible levels of these elements (i.e., 0.50ppm for Pb and 1.00 ppm for Cr). The quantitative results were checked before and after normalization with the background and better outcomes were obtained when the spectrum was normalized with the background. The LIBS results were compared to the outcomes of selected samples by a standard analytical method, inductively coupled plasma – optical emission spectroscopy (ICP-OES). Both outcomes were in outstanding conformity implying
the reliability of the LIBS measurements. The current study is attractive for the general evaluation of human health and specifically for the analysis of aloe vera based cosmetics.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Engineering and Applied Sciences (FEAS) > Department of Basic Sciences Islamabad
Depositing User: Irfan Qasim Qasim
Date Deposited: 08 Sep 2020 06:35
Last Modified: 08 Sep 2020 06:35
URI: http://research.riphah.edu.pk/id/eprint/478

Actions (login required)

View Item View Item
Riphah Research Repository is powered by EPrints 3.4 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.