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以硅胶ＧＦ２５４制板，苯－氯仿－乙酸乙酯－冰醋酸（５∶５０∶８∶３）为展开剂，用双波长薄层扫描法测定双氯芬酸凝胶剂的含量，平均回收率为１００．５％，ＲＳＤ为０．８１％。
The content of diclofenac gel was determined by two-wavelength TLC scanning with silica gel GF254 system, benzene-chloroform-ethyl acetate-glacial acetic acid (5:50:8:3). The average recoveries were 100%. 5%, RSD 0.81%.