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以鞣花酸为荧光探针的水体中二/三价铁离子的检测
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作者单位
冯焕然,赖家平,孙慧,吴伟珍,黄梦霞 1.华南师范大学化学与环境学院2.广州大学环境科学与工程学院 
基金项目:国家自然科学基金项目(21677053,21876033)
中文摘要:建立了鞣花酸(EA)测定痕量Fe2+、Fe3+的荧光分析法,并讨论了常见金属离子、甲醇体积分数以及pH值对Fe2+、Fe3+定量检测的影响。实验发现,Fe2+、Fe3+在浓度0.08~1.1 μmol/L范围内与EA的荧光猝灭程度呈良好的线性关系,检出限分别为72、63 nmol/L。同时发现酒石酸二铵对Fe3+的掩蔽效果良好。通过Job's plot得到EA与Fe2+及Fe3+的配位比分别为1∶3和1∶2。采用所建立的方法对自来水与珠江水中的Fe2+、Fe3+进行测定,其加标回收率为81.0%~116%。
中文关键词:鞣花酸  荧光探针  铁离子  检测
 
Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe
Abstract:A fluorescent analytical method for the detection of trace Fe2+ and Fe3+ in water was established using ellagic acid(EA) as fluorescent probe.The effects of common metal ions,methanol concentration and pH value of media on the quantitative detection of Fe2+ or Fe3+ were investigated in detail.Results illustrated that a good linear relationship between the flourescence quenching and the concentrations of Fe2+ and Fe3+ was obtained within the range of 0.08-1.1 μmol/L with the detection limits of 72 nmol/L and 63 nmol/L,respectively.Meanwhile,Fe2+ could be detected accurately without significant interference using 10 mmol/L ammonium tartrate to mask Fe3+.In addition,the Job's plot analysis showed that the coordination ratios for EA to Fe2+ or Fe3+ were 1∶3 and 1∶2,respectively.The established method was used in the detection of Fe2+ and Fe3+ in tap water and Zhujiang River water with average recoveries of 81.0%-116%.
Key Words:ellagic acid  fluorescent probe  ferrous/ferric ions  detection
引用本文:冯焕然,赖家平,孙慧,吴伟珍,黄梦霞.以鞣花酸为荧光探针的水体中二/三价铁离子的检测[J].分析测试学报,2019,(5):581-585.
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