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Quantification of sulfur from organic and inorganic materials for determination of <sup>35</sup>C
이흥래,강상훈,송병철,손세철,지광용,Lee, H.N.,Kang, S.H.,Song, B.C.,Sohn, S.C.,Jee, K.Y. The Korean Society of Analytical Sciences 2009 분석과학 Vol.22 No.2
The oxidation studies of a sulfur to a sulfate ion by various oxyhalide oxidants in organic (thiourea, methionine) and inorganic (sulfate, thiophosphate) compounds were carried out in an acidic solution. The optimized result of the oxidation reaction was obtained when a bromate compound (${BrO_3}^-$) as an oxidant and a 3 M $HNO_3$ solvent were used. The chemical yield for the oxidation of the organic and inorganic sulfur compounds to a sulfate ion was monitored as 80% for thiophosphate, 87% for methionine, and 100% for thiourea and sulfate within 5% RSD. The oxidations of thiourea required at least 1.6 equivalents of the bromate in an acidic solution. In the case of the oxidation of methionine and thiophosphate, the oxidation yields were above 80% if the bromate was used at 20 times higher than that of the substrates. The sulfate ion was quantitatively measured by using a GPC counting of $^{35}S$ followed by precipitates of $BaSO_4$. A quenching correction curve for the $^{35}S$ counting was obtained to use the difference via the precipitate weight result.
구연 / 제 3 회의장 / 간 30 : 위 - 식도 정맥류 출혈에 대한 치료로서 경목정맥 간내 문맥 간정맥 단락술 후 재출혈과 간성뇌병증의 발생 및 사망에 관련된 인자들의 분석
장영우(W . Y . Jang),정영화(Y . H . Chung),송병철(B . C . Song),양수헌(S . H . Yang),이한주(H . C . Lee),윤현기(H . K . Yoon),성규보(K . B . Sung),이영상(Y . S . Lee),서동진(D . J . Suh) 대한소화기학회 1999 대한소화기학회 추계학술대회 Vol.1999 No.-