Assessment of the concentration of Cr, Mn and Fe in sediment using laser-induced breakdown spectroscopy

Kebede Nigussie Mekonnen, Abayneh Ataro Ambushe, Bhagwan Singh Chandravanshi, Mesfin Redi Abshiro, Anton Du Plessis, Robert Ian McCrindle

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of levels of Cr, Mn and Fe in sediment samples and the results have been compared with that of flame-atomic absorption spectroscopy (F-AAS). Fourteen sediment samples were collected from Tinishu Akaki River (TAR), Addis Ababa, Ethiopia. Pellets of 24 mm in diameter and 3-5 mm in thickness were prepared using a manual hydraulic press under a pressure of 8000 psi by mixing finely ground sediment samples with boric acid. The concentrations of Cr, Mn and Fe were successfully determined by Q-switched Nd:YAG laser at 1064 nm. Quantification of these metals was conducted against certified reference materials of sediments and soils. The LIBS results for the elements varied from 0.060-0.707 mg/g for Cr, 0.895-3.64 mg/g for Mn and 26.9-71.8 mg/g for Fe. The F-AAS results varied from 0.061-1.37 mg/g for Cr, 1.24-4.46 mg/g for Mn and 49.0-83.3 mg/g for Fe. TAR was found to be heavily polluted with Cr.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalBulletin of the Chemical Society of Ethiopia
Issue number1
Publication statusPublished - 2013
Externally publishedYes


  • Chromium
  • Ethiopia
  • Iron
  • Laser-induced breakdown spectroscopy
  • Manganese
  • Sediment
  • Tinishu Akaki River

ASJC Scopus subject areas

  • General Chemistry


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