Comparison of Oxidation Methods in Analyzing Total Organic Carbon

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Research article

Journal of the Korean Society for Environmental Analysis 2009;12(3):172-176.

총유기탄소 분석의 산화방법 비교

변주대¹, 김태동¹, 이석기², 김현욱³, 김재령²

¹안동대학교
²동일시마즈
³서울시립대학교

Abstract

In analysis of total organic carborn (TOC), efficiency of organic oxidation is critical. There are two most well-known methods to oxidize TOC in the analysis. They are the thermo-oxidation method, and the UV-persulfate oxidation. In the thermo-oxidation method, organics in water samples is thermally oxidized to CO2 which is sequentially analyzed. In the UV-persulfate oxidation, organic material in water samples is photo-oxidized in the presence of persulfate. In this study, oxidation efficiencies of these two different methods for TOC quantification were compared by applying them to a number of water samples; some of them contained easily degradable organic carbon and some of them did hardly-degradable organic carbons. As a result, the TOC values quantified by the UV-persulfate method were about 10-20% smaller than those quantified by the thermooxidation method. When the water samples with large amount of organics were analyzed for TOC, the difference became larger.

Key Words: TOC, Oxidation, 연소산화, UV-과황산