酸蒸馏碘滴定法是测定一般食物中二氧化硫含量的一个标准检测方法。本文就此法测定中药材中二氧化硫含量的可行性和准确性作出探讨和研究。结果显示酸蒸馏碘滴定法用于中药材中二氧化硫的含量测定有很高的准确性和重现性。本文检验了 30种香港常用中药材(共42个样本 ),发现其中有24个样本中含有二氧化硫,而其中9个样本中的二氧化硫更超出 500μg/g。

Iodimetric titration is a standard method for the determination of sulphur dioxide in food samples.This paper proposed to apply this method to determine the sulphur dioxide in Chinese herbal medicines.The results indicated that the method had a high accuracy and reproducibility in the analysis of Chinese herbal medicines.In the study, 30 commonly used types of Chinese herbal medicines (totally 42 samples) were examined.24 samples were found to contain sulphur dioxide, in which 9 of them contained sulphur dioxide at concentrations greater than 500 μg/g.In the study, the method was also compared with the ion chromatographic method, and the results were very consistent.