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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.12
- 수록면
- 205 - 210 (6page)
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초록· 키워드
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Hydroperoxyl radical/superoxide anion radical (HO₂·/O₂ -·, pK_a = 4.8) as an intermediate is of considerable importance in oxidation processes. Hence, the method of detecting HO₂·/O₂ -· with high sensitivity is necessary to be developed. To achieve this objective, this study newly employed terephthalate (TA) as a probe for the measurement of HO₂·/O₂ -· in the kinetic method presented in our previous study. This method was based on the hydroxylation of TA to produce mainly hydroxyterephthalic acid or hydroxyterephthalate (OHTA), which was analyzed by fluorescence detection (λ_ex = 315 nm, λ_em = 425 nm). The life-time of HO₂·/O₂ -· and its concentration formed from the photolysis technique of H_2O₂ were reported in this study. At range of pH 2-10, the life-time of HO₂·/O₂ -· was 51-422 sec. In particular, an increase in the life-time with pH was observed. The sensitivities of the kinetic method by using TA were always higher with 1.7-2.5 times at pH 8.0 than those by using benzoic acid. From these results, this study can contribute to understanding the basic functions of HO₂·/O₂ -· in oxidation processes.
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UCI(KEPA) : I410-ECN-0101-2017-539-001538435