碘量法和分光光度法测定萝卜中维生素C含量的比较研究

The Comparative Study About the Determi-nation of Vitamin C Content in Radius With the Method of Iodometry and Spectrophotometry

采用碘量法、分光光度法两种测定方法,分别对白萝卜中的维生素C含量进行测定。碘量法测得100.0g白萝卜中含有12.4mg维生素C,加标回收率为95.53%;分光光度法测得100.0 g白萝卜中含有14.9mg维生素C,加标回收率为99.87%。实验表明,分光光度法准确度更高,适合蔬菜中维生素C含量的测定。

Using iodometry and spectrophotometry,we supervise the distribution of vitamin C in white radish. By iodometry ,we know there is 12.4rag vitamin C in 100.0g white radish,the recovery rate is 95.53%. And spectrophotometrie method to obtain 14.9mg vitamin C in100.0g white radish ,the recovery rate is 99.87%. The experiment shows that it is accurate to use speetrophotometry to supervise the distribution of vitamin C in the vegetables.