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离子色谱-积分脉冲安培检测法同时测定酱油中 20种氨基酸和6种糖

CHINESE JOURNAL OF CHROMATOGRAPHY(2019)

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Abstract
建立了梯度淋洗-离子色谱-积分脉冲安培检测法同时测定酱油中20种氨基酸和6种糖的方法,通过对色谱柱温度、pH值、放置时间等实验影响因素的考察,探索出了适合26种组分测定的多级梯度淋洗条件.结果表明,当流速为0.25 mL/min,pH值在5.2~6.7,柱温在35℃时,26种组分在各自的浓度范围内具有良好的线性关系(r2≥0.995).除了谷氨酰胺、亮氨酸、异亮氨酸、蛋氨酸外,其他22种组分的检出限均小于0.03 mg/L;在0.20、0.50、2.00 mg/L 3个添加水平下,回收率为84.2%~109%,RSD为2.7%~7.8%.该方法高效、简便、灵敏、准确,可用于酱油中多种氨基酸和糖的同时测定以及掺假辨别技术研究.
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Key words
ion chromatography (IC), gradient elution, integrated pulsed amperometric detection, amino acid, carbohydrate, soy sauce
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