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目的：测定复方益康宁中的盐酸普普卡因和维生素B6二组分含量。方法：采用光度分析中的联立方程组新解法测定盐酸普鲁卡因和维生素B6二组分含量。结果：在选定的实验条件下盐酸普鲁卡因和维生素B6的线性范围分别是0．000－0．147mmol／L和0．000－0．175mmol／L。该两组分的回收率分别为100．5％和99．8％，CV不大于1．9％（n＝10）。结论：本方法用吸收比代替吸收系数，不但操作简便而且准确度高。
OBJECTIVE: To determine the content of two components of prussin hydrochloride and vitamin B6 in compound Yikangning. METHODS: A new method of simultaneous equations in photometric analysis was used to determine the contents of procaine hydrochloride and vitamin B6. Results: The linear ranges of procaine hydrochloride and vitamin B6 under the selected experimental conditions were 0.000-0.147 mmol/L and 0.000-0.175 mmol/L, respectively. The recovery of the two components was 100.5% and 99.8%, respectively, and the CV was not more than 1.9% (n=10). Conclusion: This method uses absorption ratio instead of absorption coefficient, which is not only easy to operate but also has high accuracy.