离子色谱法测定浓香型白酒窖泥中水溶性钾的含量
Liquor Making(2021)
Abstract
建立了离子色谱法测定浓香型白酒窖泥中水溶性钾含量的方法.样品经风干过筛、称量、加水超声提取、离心取上清液、过0.22μm微孔滤膜后稀释进样,采用IonPacTM CS12A RFICTM分离柱(4×250mm)分离,20mmol/L甲基磺酸水溶液为淋洗液进行等度洗脱,流速:1.0mL/min,进样量:25μL,检测器:ICS-5000+DC电导检测器.在0.5~10.0mg/L范围内呈线性,相关系数R2=0.99998,窖泥样品加标回收率为92.3%~101.62%.该方法满足方法学精密度的要求,可用于检测窖泥中水溶性钾的含量,从而监测窖泥的老熟过程中水溶性钾的含量水平,为浓香白型白酒窖池的日常养护供数据依据.
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