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投稿时间：2020-06-30
投稿时间：2020-06-30
中文摘要: 以四氧化三铁（Fe3O4）-1-甲基-3-丁磺酸基咪唑硫酸氢盐（1-methyl-3-butanesulphonic acid imidazole bisulfate，[BSMIM]HSO4）复合材料为基质，玻碳电极（glassy carbon electrode，GCE）为工作电极，制备Fe3O4-[BSMIM]HSO4/GCE传感器用于茶叶中儿茶酚（catechol，CC）的定量分析。研究表明，Fe3O4-[BSMIM]HSO4复合材料具有良好的吸附作用和导电性，能够有效的促进电极表面电子的转移速率，提高响应电流，增加电极灵敏度。利用Fe3O4-[BSMIM]HSO4/GCE对茶叶中CC进行定量分析，CC浓度与其氧化峰电流在1.0×10-6mol/L～1.2×10-2mol/L范围内呈良好的线性关系，线性方程为 Y=0.025 5X+0.079（X 为儿茶酚浓度），R2=0.999 5，相关性较好，检出限（3σ）为 1.17×10-7mol/L，加标回收率在98%～102%之间，回收效果较好，准确度较高，且该传感器重复性较好，检测结果与气相色谱法检测结果一致。
Abstract:Ferric oxide-1-methyl-3-butanesulphonic acid imidazole bisulfate（[BSMIM]HSO4）composite modified glassy carbon electrode for detection of catechol（CC）in tea.The results showed that Fe3O4-[BSMIM]HSO4had a good conductivity and adsorption，it could effectively promote electron transfer，improved the response current，and increased the electrode sensitivity.The quantitative analysised of CC in tea was studied by Fe3O4-[BSMIM]HSO4/GCE.The studied found that there was a wide linear from 1.0×10-6mol/L-1.2×10-2mol/L between CC concentration and oxidation peak current.the equation was Y=0.025 5X+0.079（X stand for the concentration of CC），R2=0.999 5，the detection limit（3σ）for CC was 1.17×10-7mol/L.Recovery rate was 98%-102%，recycling was better and the accuracy of the method was high.The sensor had good repeatability and the detection results were consistent with those of gas chromatography.
keywords: catechol ferric oxide ionic liquid sensor detection
文章编号：202019032 中图分类号： 文献标志码：
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