积分脉冲安培法测定苯乙胺

Integrated Pulsed Amperometric Detection(IPAD) of Phenylethylamine

通过积分脉冲安培法对苯乙胺进行检测，在合适的电位设置下，苯乙胺在金电极上具有非常灵敏的响应。该方法的主要优点在于它的灵敏度、重现性和稳定性都很好。通过施加高频率的脉冲波和清洗电极的电位使得金电极不被污染。通过循环伏安法找到苯乙胺的氧化电位，并根据氧化电位确定积分脉冲安培法的相关参数。研究了积分脉冲安培法对苯乙胺检测的最佳参数：苯乙胺的氧化电位为0．650V，氧化时间为0．2s；NaOH溶液（pH=12．7）为最佳底液；测定的线性范围1．15×10^-5～1．67×10^-7mol／L，检测限为1．00×10^-6mol／L，平均回收率为95．8％。对测定的干扰情况进行了研究。

The integrated pulsed amperometric detection（IPAD） was applied to the detection of phenylethylamine. At an appropriate potential, phenylethylamine responded sensitively at an Au-electrode. The main advantages are the high sensitivity, good reproducibility and stability. The method has the ability to keep the working electrode clean by the use of a high-frequent pulse waveform and a cleaning potential. In this article, the oxidation potential of phenylethylamine was determined by cyclic vohammetry, and the integrated pulsed amperometric parameters were studied. The proper parameters are ： phenylethylamine should be oxidized under a potential of 0. 650 V for 0. 2 s, the optimum electrolyte is NaOH solution（ pH = 12. 7 ）, the range of linearity is 1.15 × 10^-5 - 1.67 × 10^-7 mol/L, the detection limit is 1.00 × 10^-7 moL/L, and the average recovery is 95.8%. In addition, the interfering factors were also studied in this article. In conclusion, this method has a good reproducibility and it is easy, inexpensive and time saving.