邹沫君

（乐山市食品药品检验检测中心，四川 乐山 614000）

摘要：目的：建立离子色谱/电导检测法测定百合中二氧化硫残留量的分析方法。方法：试样经酸蒸馏提取，离子色谱法测定硫酸根离子含量。选用IonPac AS19 阴离子交换分离柱，在线产生40mmol/L KOH 淋洗液等度洗脱，流速1.0mL/min，以抑制型电导检测器检测。结果：在0.0μg/mL～200.0μg/mL 浓度范围内，线性关系良好，检出限为2.26mg/kg，定量限为7.53mg/kg，回收率为91.52%～98.65%（RSD 值为0.89%～1.54%），精密度为0.40%～0.57%。结论：该方法操作简便、批量处理时间短、定性定量准确、灵敏度高，适合百合中二氧化硫残留量的检测。

关键词：百合；二氧化硫；离子色谱；电导检测

Determination of Residual Sulfur Dioxide in Chinese Medicinal Lilium Brownii by Ion Chromatography

ZOU Mo-jun

（Leshan Center for Food and Drug Control，Leshan 614000，China）

Abstract: Object：A new method was established to determine residual sulfur dioxide in Lilium brownii by ionchromatography with conducting detection. Methods：Samples were extracted by acid distillation. The separation wasperformed on an Dionex IonPac AS19 anion analytical column. The mobile phase consisted of 40 mmol/L KOHsolution in isocratic elution at a flow rate of 1.0mL/min. Auto-generated conducting detection ASRS ULTRA II 4mmwas used. Results：The results showed that the linear relation of residual sulfur dioxide was good in the range of0.0～200μg/mL（r=0.9998）. The limits of detection of the method was 2.26mg/kg and the limit of quantitation was7.53mg/kg. The average recoveries of residual sulfur dioxide in Lilium browniiranged between 91.52%～98.65% atdifferent spiked levels with relative standard deviation from 0.89% to 1.54%. Precision was from 0.40 to 0.57%.Conclusion：The convenient operation and versatility of this method is suitable for the fast screening and detection ofresidual sulfur dioxide in Lilium brownii.

Key words: lilium brownii；sulfur dioxide；ion chromatography；conductivity detection

中图分类号：TS07     文献标志码：A       文章编号：1007-7871（2024）01-0027-05

2024，Vol.27，No.1