循环水中氯离子检测电极的制备及性能研究

Preparation and performance study of detection electrode for chloride ion in circulating water

以银盘电极为基底电极,在0.1 mol/L HCl溶液中、沉积电流密度为1 mA/cm^(2)、沉积时间为30 min的条件下,采用恒电流法制备了氯离子选择性电极,并考察了该电极的电化学性能。结果表明,该电极在1×10^(-1)~1×10^(-4) mol/L的氯化钠溶液中呈现良好的能斯特响应,响应斜率为59.01 mV/dec,电极检测极限为1.94×10^(-5) mol/L(0.69 mg/L),响应时间在40 s以内,具有良好的重现性和抗干扰能力,电极使用寿命超过2个月;与摩尔法相比,实际循环水样的检测结果误差为4.26%,满足循环水中氯离子快速检测要求。

Using a silver disk electrode as the substrate,a chloride ion selective electrode is prepared via constant current deposition at a current density of 1 mA·cm^(-2)for 30 minutes in a 0.1 mol·L^(-1)HCl solution.The electrochemical performance of the electrode is investigated.Results demonstrate that the electrode exhibits a good Nernst response in sodium chloride solution in the concentration range of 1×10^(-1)to 1×10^(-4) mol·L^(-1),with a response slope of 59.01 mV·dec^(-1),an electrode detection limit of 1.94×10^(-5) mol·L^(-1)(0.69 mg·L^(-1)),and a response time within 40 seconds.Additionally,the electrode displays good reproducibility and interference resistance,with a lifespan exceeding 2 months.The error in detecting actual circulating water samples is 4.26%,meeting the rapid detection requirement for chloride ions in circulating water.