连续流动注射分光光度法测定白酒中氰化物

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。

Determination of cyanide in liquor by continuous flow injection spectrophotometry

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 cyanide in liquor. Results Under the experimental conditions, the linear range was 0.01-2.5 mg/L, with the correlation coefficient 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 completely satisfies the request of international standard; moreover, it is simple, rapid, efficient and very practicable, especially suitable for the batch determination and emergent detection.