Pre-treatment Method for Determination of Sulfur Dioxide Content in Chinese Medicinal Materials
A sensitive method was developed for the determination of sulphur dioxide in nine Chinese medicinal materials,such as,Ginseng leaves,Medlar,Gorgon fruit,Anise,Cumin,Hawthorn,Licorice,Ejiao and Honeysuckle.Taking the recovery rate as an index,four different pretreatment methods were compared to optimize the pretreatment method of sulfur dioxide.As the results show,as the distillation time is 10 min,steam flow rate is 60%,ratio of sample to water is 1∶10,the Pre-treatment method for determination of sulfur dioxide content is best,the recovery rate of sulphur dioxide is94.2%～105.4%,9 kinds of Chinese medicinal materials were tested,the recovery rate of sulphur dioxide is82.4%～106.8%,the relative standard deviations of sulphur dioxide were Less than 8%.Meet the requirements of Chinese PHARMACOPOEIA 2020 edition,This method is rapid,simple,accurate and sensitive.
residual of sulfur dioxidemedicine food homologyKjeldahlrapidion chromatograph
万方数据
维普
