为了准确测定溶液中Au3+的含量,提高工作效率,利用间接碘量法,考察了pH、温度、时间、KI加入量、指示剂存放时间等影响因素,探索碘量法测Au3+的最佳试验条件,并结合正交试验确定影响影响因素的最佳条件。试验结果如下:pH、温度、时间KI加入量对测定结果的影响比较显著。通过正交试验获得最佳条件为pH=5,T=25℃,t=5min,KI=0.5g,此条件下测得Au3+浓度相对误差为-1.5%。 In order to accurately measure the content of Au3 + in the solution and improve the working efficiency, the influencing factors of pH, temperature, time, KI addition, indicator storage time and so on were investigated by indirect iodometry to explore the best experimental conditions of Au3 + , And combined with orthogonal test to determine the best conditions affecting the influencing factors. The test results are as follows: pH, temperature, time KI added amount of the determination of the impact of the more significant. The optimum conditions obtained by orthogonal test were pH = 5, T = 25 ℃, t = 5min, KI = 0.5g. Under these conditions, the relative error of Au3 + concentration was -1.5%.