Study on the Determination Method of Total Cyanide in Waste Liquid after Gold-carrying Carbon Desorption
The determination method of total cyanide of the waste liquid after desorption was established.After reducing the sampling amount of silver nitrate solution was added to eliminate most sulfide and thiocyanogen interference,the EDTA disodium salt and phosphoric acid were selected as the pre-distillation reagent,and the distillation liquid was absorbed by the sodium hydroxide solution;since the total cyanide content was determined by silver nitrate titration between 10 and 25 mg/L.The relative standard deviation of the measurement method is between 0.20％and 0.67％,and the recovery rate of the added standard materials is 92.5％～100.8％,and the accuracy and precision is good.The method can be used as the determination method of total cyanide after gold carbon desorption of cyanide leaching activated carbon.
total cyanidegold carbondesorptionthiocyanatesilver nitrate titration method
NETL
NSTL
万方数据
