Folin-Ciocalteu光度法测定栲胶法脱硫过程总多酚  

Determination of total polyphenol in tannic extract desulfurization process by Folin-Ciocalteu spectrophotometry

作　　者：曹家兴[1] 袁园[1] 浮建军[1] 张震[1] 姚小秋 钱福军 莫友彬 薛敏华[1] CAO Jia-xing;YUAN-yuan;FU Jian-jun;ZHANG-zhen;YAO Xiao-qiu;QIAN Fu-jun;MO You-bin;XUE Min-hua(College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;Guangxi Research Institute of Chemical Industry, Nanning 530001, China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西化工研究院,广西南宁530001

出　　处：《天然气化工—C1化学与化工》2018年第2期46-50,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金(21266003);广西教育厅自然科学基金(2012024LX001)

摘　　要：基于栲胶法脱硫过程中多酚的氧化还原状态转化,本文采用谱带数据取代传统的单波长数据对Folin-Ciocalteu试剂测定多酚含量进行了条件优化试验及分析,建立了适用于栲胶法脱硫过程中总多酚的定量方法:没食子酸质量浓度为1.0~6.5μg/m L范围内符合线性定量关系,相关系数为0.9997,方法精密度RSD为0.21%、加标回收率在97.4%~108.9%,应用该方法测定了典型栲胶法脱硫液氧化再生过程中总多酚浓度及其变化规律,测定结果表明栲胶中的多酚在氧化再生过程中不能全部被氧化为醌态。The tannin extract desulfurization process is based on the redox state transition of polyphenol. The content of polyphenol in Folin-Ciocalteu reagent was optimized by using the band data to replace the traditional single-wavelength data. The quantitative method of total polyphenol for tannin extract desulfurization process was established. The concentration of gallic acid was linear in the range of 1.0-6.5 μg/m L with a correlation coefficient of 0.9997. The precision（RSD） was 0.21%, and the recoveries were in the range of 97.4%-108.9%. The method was applied to determine the concentration of total polyphenol during the regeneration process of typical tannin extract. The results showed that the polyphenols in tannin extract could not be oxidized to quinone in the oxidation regeneration process.

关 键 词：栲胶 脱硫过程 总多酚 FOLIN-CIOCALTEU法 分析 

分 类 号：TQ028.4[化学工程]