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离子色谱法测定皂粒中葡萄糖酸钠含量
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作者单位
冯丽枝,王岩,陈政,曹文明 1.丰益油脂科技有限公司2.丰益生物技术研发中心有限公司 
中文摘要:建立了离子色谱检测皂粒中葡萄糖酸钠含量的分析方法。样品经METROSEP CARB 1糖分析色谱柱(150 mm×4.0 mm,5 μm)分离,以150 mmol·L-1 NaOH+20 mmol·L-1NaAc水溶液为流动相进行等度洗脱,流速1.0 mL·min-1,采用瑞士万通850型离子色谱仪,选择脉冲安培检测器进行测定,外标法定量。结果显示:葡萄糖酸钠在0.5~200 mg·L-1质量浓度范围内呈良好的线性,相关系数(r2)为0.999 6,检出限为0.25 mg·L-1,定量下限为0.63 mg·L-1。葡萄糖酸钠在1~20 mg/g加标范围内的回收率为80.7%~104%。该方法无需衍生化处理,操作简单方便,灵敏度高,可用于皂粒产线葡萄糖酸钠含量的监控与测定。
中文关键词:葡萄糖酸钠  皂粒  离子色谱法
 
Determination of Sodium Gluconate in Soap Noodle by Ion Chromatography
Abstract:An ion chromatographic method was established for the determination of sodium gluconate in soap noodle.Sample was separated on a METROSEP CARB 1 column by isocratic elution using 150 mmol·L-1 NaOH+20 mmol·L-1 NaAc water solution as mobile phase at a flow rate of 1.0 mL/min,and detected by Metrohm 850 ion chromatography with pulsed amperometric detector,finally quantified by external standard method.A good linear relationship was obtained for sodium gluconate in the range of 0.5-200 mg/L with a correlation coefficient(r2)of 0.999 6.The detection limit and the quantitation limit were 0.25 mg·L-1 and 0.63 mg·L-1,respectively.The recoveries at spiked levels of 1-20 mg/g ranged from 80.7% to 104%.This method was suitable for the determination of sodium gluconate in soap noodle for its derivization free procedure,simplicity and sensitivity.
Key Words:sodium gluconate  soap noodle  ion chromatography method
引用本文:冯丽枝,王岩,陈政,曹文明.离子色谱法测定皂粒中葡萄糖酸钠含量[J].分析测试学报,2019,(8):1005-1008.
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