连续流动注射分光光度法测定白酒中氰化物

Determination of cyanide in liquor by continuous flow injection spectrophotometry

目的建立连续流动注射分光光度法测定酒中氰化物的方法。方法样品经稀释后,应用连续流动注射分光光度仪测定其中的氰化物。结果在该实验条件下,酒中氰化物的线性范围为0.01~2.5 mg/L,相关系数r≥0.999,精密度为1.1%~2.2%,加标回收率为85%~104.2%。结论应用连续流动注射分光光度法测定酒中氰化物,符合国标要求,并且操作简单,提高了工作效率,对批量检测和应急检测有着十分重要的意义。

Objective To establish a continuous flow injection spectrophotometric method for the determination of cyanide in liquor. Methods The samples were diluted, and then continuous flow injection spectrophotometry was used to determine cya- nide in liquor. Results Under the experimental conditions, the linear range was 0.01-2.5 mg/L, with the correlation coeffi- cient being more than or equal to 0.999. The relative standard deviation was 1.1%-2.2%, and the recoveries of spiked samples ranged between 85% and 104.2%. Conclusions The results show that determination of cyanide in liquor by the continuous flow injection spectrophotometric method complete].y satisfies the request of international standard; moreover, it is simple, rapid, efficient and very practicable, especially suitable for the batch determination and emergent detection.