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目的测定中药材中二氧化硫含量。方法采用酸蒸馏碘滴定法来测定白芍、山药、浙贝等中药材中二氧化硫的含量。结果所选取的50份中药材样本均有不同浓度的二氧化硫残留。结论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。
Objective To determine the content of sulfur dioxide in Chinese herbal medicine. Methods Acid distillation iodine titration method was used to determine the content of sulfur dioxide in Radix Paeoniae Alba, Chinese yam and Chinese cabbage. Results The selected 50 samples of Chinese herbal medicines had different concentrations of sulfur dioxide residues. Conclusion Acid distillation iodine titration method for the determination of sulfur dioxide in Chinese herbal medicine has a very high accuracy.