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采用双波长k系数倍率法测定复方苯甲酸酊中两组分的含量，苯甲酸和水杨酸的测定波长分别为271nm和296nm，方法平均回收率分别为100.2％，RSD＝0．52％，n＝7和99．8％，RSD＝0．24％，n＝7。方法简便快速，结果可靠。
The contents of two components in compound benzoic acid tincture were determined by double-wavelength k-factor magnification. The determination wavelength of benzoic acid and salicylic acid were 271nm and 296nm respectively. The average recoveries were 100.2%, RSD = 0.52% n = 7 and 99.8%, RSD = 0.24%, n = 7. The method is quick and easy, the result is reliable.