Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe

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Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe

- Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe
- Vol. 38, Issue 5, Pages: 581-585(2019)
- 作者机构：
  
  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
- 作者简介：
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Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe. [J]. 38(5):581-585(2019)
DOI：

Detection of Ferrous/Ferric Ions in Aqueous Phase Using Ellagic Acid as Fluorescent Probe. [J]. 38(5):581-585(2019) DOI：

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%。

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%.

关键词

鞣花酸荧光探针铁离子检测

Keywords

ellagic acidfluorescent probeferrous/ferric ionsdetection

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