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应用双波长分光光度法消除溴咖合剂中尼泊金及溴化钠的干扰，不经分离，直接测定咖啡因含量，方法简便、迅速、其平均回收率为１００．０６％；ＲＳＤ为０．８７％，ｎ＝３。关键词
The dual-wavelength spectrophotometry method was used to eliminate the interference of bromine and caffeine in sodium bromide and sodium bromide. Without separation, the direct determination of caffeine content was simple and rapid. The average recovery was 100.06%. 87%, n = 3. Key words