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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Accurate determination of total arsenic in rice considering arsenic species

2018년 8월 21일 17시 48분 11초
ANAL.P-346 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (금요일) 11:00~12:30
포스터 분석구두발표
Analytical Chemistry
저자 및
Wonbae Lee, Ngo Van Tho, Sang-Ho Nam*
Department of Chemistry, Mokpo National University, Korea
Accurate determination of arsenic in a sample has been important because the toxicity related to the arsenic element has been widely known. In particular, arsenic species must be well considered because their toxicity varies according to chemical form. If the total arsenic in a sample is in trace level below the allowance maximum of any arsenic species, the quantitation of total arsenic might be satisfactory. In general, for the quantitation of total arsenic in a sample, arsenic species in a sample have been not considered at all. The standard solution of total arsenic has been made by As5+ standard solution. It might be good for the sample which its major species are As5+. But, if the major species of arsenic in a sample are different from As5+, the standard arsenic species for calibration curve must be deeply considered. This study showed the amount of total arsenic in a sample could be falsely obtained by the standard solution of different arsenic species. The standard arsenic species used in this study were As3+, As5+, MMA, DMA and AsB. Total arsenic was analyzed in rice using various methods including standard addition method and internal standard method. Ge, In, Rh, Te and Se as internal standards were also investigated for the determination of total As in rice. The best internal standard for total arsenic in rice was Te.