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建立测定白酒中氰化物流动注射在线蒸馏方法。采用全自动流动注射分析仪,对白酒中的氰化物进行测定,在最佳条件下,方法在5.0～500μg/L的浓度范围内具有良好线性(r=0.9998),方法的检出限为5μg/L,精密度试验相对标准偏差(RSD)为0.55%～0.89%,平均回收率为94.8%～102.5%,与国标方法中异烟酸-吡唑啉酮分光光度法比较,无明显差异。
Establishment of an Online Distillation Method for the Determination of Cyanide in White Wine by Flow Injection. Using the automatic flow injection analyzer, the cyanide in liquor was determined. Under the optimal conditions, the method has a good linearity (r = 0.9998) in the concentration range of 5.0 ~ 500μg / L and the detection limit of the method was 5μg / L. The relative standard deviations (RSDs) of precision tests were between 0.55% and 0.89%, and the average recoveries ranged from 94.8% to 102.5%. There was no significant difference between the method of ISA and the method of isonicotinic acid-pyrazolone spectrophotometry.