溴化钾来甲酸钠咖啡因合剂收载于《中国医院制剂规范（西药制剂第二版）》，内含of％本甲酸为防腐剂，以碘量法测定咖啡因含量”’。本文建立系数倍率法，消除本甲酸干扰，结果满意。1．仪器与药品：UV－76O分光光度计（上分三厂）；本甲酸钠咖啡因（四川省乐山制药厂）；苯甲? Potassium bromide sodium formate caffeine mixture contained in the “Chinese hospital preparation specification (Western Medicine Preparation Second Edition), containing% of the formic acid as a preservative, determination of caffeine content by iodometric method.” This article establishes the coefficient magnification France, to eliminate the interference of this formic acid, the results are satisfactory. 1. Instruments and Drugs: UV-76O spectrophotometer (divided into three plants); sodium formate caffeine (Sichuan Leshan Pharmaceutical Factory)