Br^-离子选择性电极法测定地表水化学需氧量的研究  

Study on the detection of the COD values of the ground water by using bromide ion selective electrode

作　　者：柴怡浩[1] 丁红春[1] 张中海[1] 潘振声[1] 金利通[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《化学传感器》2004年第1期16-20,共5页Chemical Sensors

基　　金：国家自然科学资金(No.20327001);科技攻关(No.2002AA6013330)资助项目

摘　　要：该文基于KBrO_3能在光照的纳米TiO_2表面接受光生电子,减少纳米TiO_2光生电子和光生空穴的复合,提高纳米TiO_2的光催化氧化能力,提出了一种新的光催化氧化体系——纳米TiO_2-KBrO_3协同作用测定地表水化学需氧量(COD)的方法。以Br^-离子选择性电极为手段探讨了光催化氧化COD的机理,考察了测定COD的最佳反应条件。实验结果表明,该方法条件温和,不会造成二次污染,能够实现COD快速准确的测定。在该实验所选择的条件下,可准确的测定2.0～100 mg/L之间的COD值,检测限为0.8 mg/L。A new photocatalytic and oxidation system, nano TiO_2—KBrO_3 synergic system, for the detection of the chemical oxygen demand (COD) of the ground water was studied. The bromide ion selective electrode was used as the detection method so that the detection time was largely shortened. This new method is a fast and precise method for detecting the COD value without producing second pollution. The optimal experimental conditions of the detection were discussed by using glucose as a standard substance. The application range is 2.0～100mg/L, and the lowest limit of detection is O. 8 mg/L.

关 键 词：地表水 化学需氧量 光催化氧化 纳米TiO2 溴酸钾 协同作用 离子选择性电极 

分 类 号：X832[环境科学与工程—环境工程]