离子色谱法测定酒中的有机酸和无机阴离子

Determination of Organic Acids and Mineral Anions in Liquor by Ion Chromatography

摘要:

建立用离子色谱/电导检测法测定酒类中有机酸和无机阴离子的分析方法。样品经水稀释，经0.45 μm滤膜过滤后直接进样检测；选用Ionpac AS11阴离子交换分离柱，氢氧化钾淋洗液梯度洗脱，流速1.0 mL/min，以抑制电导检测器检测。该方法对11种有机酸和5种无机阴离子具有良好的线性，相关系数在0.9909~0.9997之间；准确度和精密度良好，样品加标回收率在81.0~117.8%之间，RSD小于5.0%；检出限低，在0.015~0.152 mg/L之间。该方法线性范围广，准确性和精密度良好，操作较简便，结果满意，能满足日常检验要求。

Abstract:

A new method was established to determine organic acids and mineral anions in liquor by ion chromatography with conducting detection. The samples were diluted by water and filtrated with 0.45 μm membrane. The samples solution were injected and analysized. Ionpac AS11 was selected as the separation column. The gradient KOH solution with a flow rate 1.0 mL/min was used as eluent. Auto-generated conducting detection ASRS-4mm was used. The method had good relativity (the correlative coefficients(r) were 0.9909~0.9997). and the extraction recoveries were 81.0~117.8%. In addition, the RSD were less than 5.0%. and the detection limits were 0.015~0.152 mg/L. The method had a wide linear range, good repeatability and accuracy.