论文部分内容阅读
该文通过电化学聚合的方法制得了一种化学修饰铂盘 (直径为 2 0 0微米 )电极。采用循环伏安 ,差示脉冲伏安和差示脉冲安培研究了此修饰电极对氧的响应。实验表明 ,四氨基铜酞菁对氧有较好的催化作用。用此修饰电极采用差示脉冲安培法测定溶解氧灵敏度为 4 .8× 10 - 4A/mol/L ,检测限根据三倍信噪比计算得 1.8× 10 - 6 mol/L ,且响应时间少于 15秒。研究还发现 ,此修饰电极具有很好的稳定性和重现性。采用此修饰电极测定锅炉水中的溶解氧得到了满意的结果。
In this paper, a chemically modified Pt plate (200 μm in diameter) was prepared by electrochemical polymerization. Cyclic voltammetry, differential pulse voltammetry and differential pulse amperometry were used to investigate the response of the modified electrode to oxygen. Experiments show that tetraamino copper phthalocyanine has a good catalytic effect on oxygen. The sensitivity of dissolved oxygen to this modified electrode was measured by differential pulse amperometry to be 4. 8 × 10 -4 A / mol / L. The detection limit was calculated to be 1.8 × 10 -6 mol / L based on triple signal to noise ratio with less response time At 15 seconds. The study also found that the modified electrode has good stability and reproducibility. The modified electrode was used to determine the dissolved oxygen in boiler water, and satisfactory results were obtained.