119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists Ⅰ
Room No. 303호
Time THU 10:34-:
Code ANAL1.O-40
Subject Feasibility of a compact low-cost laser-induced breakdown spectroscopy device for quantitative analysis of metallic elements in edible salt products
Authors 김향, 남상호, 이용훈*
목포대학교 화학과, Korea
Abstract We investigated feasibility of a compact low-cost laser-induced breakdown spectroscopy (LIBS) device for quantitative analysis of Ca and Mg in edible salts. By using a compact low-power diode-pumped solid-state (DPSS) laser and a miniature non-gateable charge-coupled device (CCD) spectrometer, the LIBS spectrometer could be significantly simplified. The standard materials were prepared using mixtures of NaCl, MgSO4, and CaCO3 in forms of solid pellets. The DPSS laser beam (270 microjoule/pulse) was focused on the pellet surface through an objective lens. Optical emission from the laser-induced plasma was collected and sent to the non-gateable miniature CCD spectrometer. For each concentration of Ca or Mg, the averaged emission line intensity from the measurements for multiple pellets provided the improved analysis precision in comparison with that obtained from multiple line scans for a single pellet. This indicates that the chemical composition was homogeneous enough and however the measurement condition was not consistent among the multiple line scans within the same pellet. The fluctuation could be averaged out by taking data from multiple pellets. We applied this device and analysis methology to real salt products and discussed its feasibility as a portable in-situ analysis device for salt products.
E-mail h-90@nate.com