流动注射-化学发光法测定苯酚：基于高锰酸钾和甲醛体系

Flow injection-chemiluminescence determination of phenol using potassium permanganate and formaldehyde system.

作者信息

Cao Wei, Mu Xuemin, Yang Jinghe, Shi Wenbo, Zheng Yongcun

机构信息

School of Chemistry and Chemical Engineering, Jinan University, Jinan 250022, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2007 Jan;66(1):58-62. doi: 10.1016/j.saa.2006.02.021. Epub 2006 Mar 2.

DOI:10.1016/j.saa.2006.02.021

PMID:16815091

Abstract

It is found that phenol can react with potassium permanganate in the acidic medium and produce chemiluminescence, which is greatly enhanced by formaldehyde. The optimum conditions for this chemiluminescent reaction are in detail studied using a flow injection system. The experiments indicate that under optimum conditions, the chemiluminescence intensity is linearly related to the concentration of phenol in the range 5.0x10(-9) to 1.0x10(-6)gmL-1 with a detection limit (3sigma) of 3x10(-9)gmL-1. The relative standard deviation is 1.2% for 4.0x10(-7)gmL-1 phenol solution in 11 repeated measurements. This method has the advantages of simple operation, fast response and high sensitivity. The method is successfully applied to the determination of phenol in the waste water.

摘要

研究发现，苯酚在酸性介质中能与高锰酸钾发生反应并产生化学发光，甲醛可大大增强这种化学发光。使用流动注射系统详细研究了该化学发光反应的最佳条件。实验表明，在最佳条件下，化学发光强度在5.0×10⁻⁹至1.0×10⁻⁶ gmL⁻¹范围内与苯酚浓度呈线性关系，检测限（3σ）为3×10⁻⁹ gmL⁻¹。对4.0×10⁻⁷ gmL⁻¹苯酚溶液进行11次重复测量，相对标准偏差为1.2%。该方法具有操作简单、响应快、灵敏度高的优点。该方法已成功应用于废水中苯酚的测定。