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离子色谱法测定中药材百合中的 二氧化硫残留量

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

 

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