离子色谱法测定葡萄酒中的高氯酸盐

建立了离子色谱测定红酒中高氯酸盐的分析方法。以4种葡萄酒为典型样品,测定了其中的高氯酸盐含量。使用Metrosep A Supp5阴离子分析柱(150 mm×4.0 mm)进行分离,柱温为40℃,流动相为1.0 mmol/L碳酸钠水溶液-丙酮(85∶15,v/v),流速为0.8 m L/min。结果表明,高氯酸盐在0.1~10 mg/L内具有良好的线性关系,相关系数为0.999 8,方法回收率大于86.0%,相对标准偏差小于2.6%。该方法前处理方便快捷、检测灵敏度高,可满足红酒中高氯酸盐含量的测定。

Determination of perchlorate in wine by ion chromatography

An ion chromatographic method was developed for the determination of perchlorate in wine. The content of perchlorate in four kinds of wine was determined. Metrosep A Supp5 column (150 mm×4.0 mm) was used for the separation with the eluent of 1.0 mmol/L Na₂CO₃-acetone (85 : 15, v/v) at the flow rate of 0.8 mL/min, and the column temperature was 40℃. Perchlorate had good linearity in the range of 0.1-10.0 mg/L. The recoveries of the method were more than 86.0%, and the relative standard deviations were less than 2.6%. The method is simple and rapid, and can be used for the determination of perchlorate in wine.