离子色谱法测定常用药食两用中药材中的二氧化硫含量

Determination of Sulphur Dioxide in Commonly Used Chinese Herbal Medicines with Both Food and Medicine Function for Health Care by Ion-chromatographic Method

目的:测定常用保健药食两用药材中二氧化硫含量。方法:采用酸蒸馏法及离子色谱法。结果:被测定的32个样品中,26个样品含有二氧化硫,含量不等,多者可达3180μg/g。用水清洗药材,二氧化硫不易除去。样品置于室外通风处或水煎煮可降低样品中二氧化硫含量,煎煮时间对煎液中残留的二氧化硫含量有一定的影响。结论:测定方法简便,精密度及重现性良好。

Objective： To dertermine SO2 in Chinese herbal medicine with both food and medicinal functions. Methods： A distil- ling and ion-chromatorgraphic method was applied. Results： The results indicated that among 32 commonly used Chinese herbal medi- cines, 26 samples contained sulphur dioxide, varying in its contents and up to 3180 Ixg/g. The amount of sulphur dioxide did not change much after samples were washed by water. On the other hand, sulphur dioxide contents decreased after samples were exposed outdoor or boiled in water. Conclusion： The method was simple, accurate and reproducible.