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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A study on the determination of inorganic arsenic by solid phase extraction and laser ablation inductively coupled plasma mass spectrometry

2018년 8월 21일 17시 54분 42초
ANAL.P-347 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (금요일) 11:00~12:30
포스터 분석구두발표
Analytical Chemistry
저자 및
Seon Hwa Lee, Sang-Ho Nam*
Department of Chemistry, Mokpo National University, Korea
The toxicity and chemical properties of arsenic depend on the concentration and chemical structure present in the natural environment. Inorganic arsenic is more toxic than organic arsenic, thus the accurate determination of inorganic arsenic in various samples is needed. IC-ICP-MS (Ion Chromatography-Inductively Coupled Plasma-Mass Spectrometry) is the current method for quantitative and qualitative determination of arsenic. However, the method has disadvantage of expensive and complex instrument, and elaborate sample preparation. In this study, inorganic arsenic species were separated using a membrane filter disk in the SPE (Solid Phase Extraction) method, then determinated by LIBS (Laser Induced Breakdown Spectroscopy) and LA-ICP-MS (Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry). The detection limit of inorganic arsenic is 10 mg/kg by the SPE membrane filter with LIBS. The detection limit of inorganic arsenic was 1.0 μg/kg by 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. The linear dynamic range was from 1 to 1000 µg/kg by LA-ICP-MS, and the correlation coefficient was 0.9997. A new method using solid phase extraction and LA-ICP-MS was a accurate and sensitive method for quantitative analysis of inorganic arsenic in a sample.