119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Analytical Chemists Ⅱ
Room No. 303호
Time FRI 09:00-:
Code ANAL2.O-1
Subject Evaluation of Laser-Induced Breakdown Spectroscopy as a simple method for identifying geographical origins of agricultural products
Authors 음창환, 이윤정, 정회일*
한양대학교 화학과, Korea
Abstract Fast identification of geographical origins of agricultural products becomes more demanding recently. For this purpose, Raman and near-infrared (NIR) spectroscopy have been widely employed since the corresponding measurements are fast and non-destructive with minimal or no sample pretreatments. These spectroscopic methods provides molecular structural information of sample components for the identification; while, the difference in atomic composition in samples is alternatively valuable in many cases. Therefore, laser-induced breakdown spectroscopy (LIBS), which can provide information on almost all elements, has gained an attention. LIBS-based measurement is also fast as nearly non-destructive as comparable with Raman and NIR spectroscopy. Here, we have utilized LIBS for the identification of geographical origin of milk vetch root. The pellets made from domestic and imported milk vetch root samples were measured and the acquired LIBS spectra were used for the discrimination using several chemometric methods. For the collection of representative spectra, LIBS spectra acquired at different spots on each pellet were averaged. The resulting discrimination accuracy was evaluated in conjunction with the difference in the composition of elements.
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