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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A simple laser-induced breakdown spectroscopy analysis method for Mg and Ca in edible salts: Sample surface height optimization and intensity normalization

2018년 8월 22일 09시 24분 44초
ANAL.P-348 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (금요일) 11:00~12:30
포스터 분석구두발표
Analytical Chemistry
저자 및
Kim Hyang, Yoonji Jeon1, Wonbae Lee, Sang-Ho Nam, Yonghoon Lee*
Department of Chemistry, Mokpo National University, Korea
1Mokpo National University, Korea
Feasibility of a simple laser-induced breakdown spectroscopy (LIBS) instrument has been investigated for analysis of Mg and Ca in edible salts. The LIBS instrument was assembled with a compact low-power diode-pumped solid-state laser and a non-gated handheld spectrometer. A simple sampling process, called a dip-and-dry method, was employed for on-site application; a piece of filter paper was dipped in aqueous solution of the sample salt and dried to be analyzed by LIBS. The analytical performance could be significantly improved by (i) optimization of the sample surface height during laser ablation and (ii) normalization of the analyte line intensities using the Na I line at 616 nm as a reference signal. For commercially available salt products, the Mg II and Ca I line intensities could be well correlated with the concentrations of Mg and Ca determined by inductively coupled plasma- optical emission spectroscopy. Our results indicate that the combination of a compact low-cost LIBS device and the simple sampling method is promising as an on-site salt quality monitoring methodology.