Elemental analyses and determination of lead content in kohl (Stone) by laser-induced breakdown spectroscopy

Abul Fazal Mohammed Yusuf Haider, Rebeka Sultana Lubna, Kazi Monowar Abedin

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Elemental analyses of kohl (stone) samples collected from three different parts of the world were performed using laser-induced breakdown spectroscopy (LIBS). The analyses indicated that lead (Pb), copper (Cu), silver (Ag), iron (Fe), calcium (Ca), aluminum (Al), silicon (Si), and sodium (Na) were present in all the kohl samples. In addition to these elements, the sample from Madina, Kingdom of Saudi Arabia (KSA), contained the elements tin (Sn), zirconium (Zr), and antimony (Sb). The sample from Mount Toor, Egypt, also contained Sn. Also, quantitative analysis for lead was carried out by the standard addition method using the LIBS technique. The result showed the presence of 14.12 ± 0.28% by weight of Pb in the sample from Madina, which compares well with the measurement done using atomic absorption spectroscopy (AAS) (13.31 ± 0.46%). The standard addition method used three calibration curves drawn for three emission lines of the LIBS spectra of Pb. The limits of detection (LoD) for these calibration curves varied from 0.27% to 1.16% by weight. The lead contents of the samples from Mount Toor and the local market of Bangladesh were also measured by the AAS technique, and the results were 14.61 ± 0.48% and 8.98 ± 0.35% by weight, respectively. The reason for determining only the lead content in kohl, which may be used as an eye cosmetic, is the adverse effect that lead has on health.

Original languageEnglish
Pages (from-to)420-425
Number of pages6
JournalApplied Spectroscopy
Volume66
Issue number4
DOIs
Publication statusPublished - Apr 2012

Keywords

  • Kohl
  • Laser-induced breakdown spectroscopy
  • Lead
  • LIBS
  • Standard addition method

ASJC Scopus subject areas

  • Spectroscopy
  • Instrumentation

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