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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A study on the determination of inorganic arsenic by solid phase extraction and fs LA-ICP-MS

2019년 1월 30일 16시 28분 42초
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목 10시 : 00분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
Seon Hwa Lee, Sang-Ho Nam*
Department of Chemistry, Mokpo National University, Korea
The toxicity of arsenic depend on the concentration and chemical structure present in the natural environment. Thus, the accurate determination of inorganic arsenic in various samples is necessary. IC-ICP-MS (Ion Chromatography-Inductively Coupled Plasma-Mass Spectrometry) is the most popular method for quantitative and qualitative determination of arsenic. However, the method has disadvantage of complex instrument, elaborate sample preparation and long analysis time. In this study, inorganic arsenic species were separated using a membrane filter disk with strong anion exchange in the SPE (Solid Phase Extraction) method, then determinated by fs LA-ICP-MS (femtosecond Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry). The detection limit of inorganic arsenic was 0.095 μg/kg by fs LA-ICP-MS. The pH value of the sample was adjusted to 4 using ammonium hydroxide and phosphoric acid for the efficient separation of inorganic arsenic species from organic arsenics. The linear dynamic range was from 1 to 1000 µg/kg by LA-ICP-MS, and the correlation coefficient was 0.99997. The recovery rate of the sample is close to 110%. A new method using solid phase extraction and fs LA-ICP-MS was the accurate and sensitive method for quantitative analysis of inorganic arsenic in a sample.