氮气吹出分离法测定氨化物

本工作对多级串联吹出分离法测定氰化物的可行性作了探讨。试验确定在磷酸－ＥＤＴＡ体系中用氮气吹出分离氰化氢的条件。一次可以同时处理四个样品，富集浓缩效率可达２０倍。标准水样试验结果的平均回收率为９５％，相对标准偏差为１．６—５．３％。环境水样测定结果本方法和标准方法基本相符．

Determination of cyanide by using nitrogen gas blowing separation method

In this paper, the practicability of the determination ofcyanide in waste water by using multistage series-connection blowing method was studied. The conditions of the separation test ofcyanide in the ghosphoric acid-EDTA system were established. 1- 4samples can be treated simultaneously by using this method and theconcentrating effect was as high as 20 times. The mean recovery percentage of cyanide for the standard water samples was 95 %,the relative standard deviations were in the range of 1. 6- 5. 3 %. The determined tesults of the water samples by using both of this method andthe standard method were.almest same.