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本文报导了应用放射性同位素稀释法进行咖啡因或与各种药物共同存在时咖啡因的定量分析方法。文内叙述了标准样品和待测样品的制备过程,并指出测量时及样品制备过程中应注意的一些事项。且介绍了计算含量测定结果的公式以及作者研究单独咖啡因的含量测定和与各种药物共同存在时咖啡因的含量测量的一些数据结果。在本文的实验部分详细介绍了用C~(14)H_3I将可可碱甲基化而制备C~(14)标记的放射性咖
This paper reports the quantitative analysis of caffeine in the presence of caffeine or co-existing with various drugs using radioisotope dilution. The article describes the preparation of standard samples and samples to be tested, and points out some issues to be noticed during the measurement and sample preparation. The formula for calculating the content determination results and some data results about the determination of the content of caffeine alone and the content of caffeine in the presence of various drugs are also introduced. In the experimental part of this paper, the preparation of C ~ (14) labeled radioactive coffee by methylation of theobromine with C ~ (14) H_3I