123rd General Meeting of the KCS

Type Poster Presentation
Area Analytical Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code ANAL.P-237
Subject A study on the determination of inorganic arsenic by solid phase extraction and fs LA-ICP-MS
Authors Seon Hwa Lee, Sang-Ho Nam*
Department of Chemistry, Mokpo National University, Korea
Abstract 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.
E-mail 2seon_hwa@naver.com