采用岛津ＣＳ－９３０型薄层扫描仪测定轻身减肥片中大黄素的含量，样品测定波长为４００ｎｍ，参比波长为６００ｎｍ，线性系数ＳＸ＝３，光束狭缝为１．２ｍｍ×１．２ｍｍ，该法测得大黄素在０．２２μｇ～１．１０μｇ之间，浓度与峰面积呈一直线：ｒ＝０．９９９０。回收率为９９．８％，ＲＳＤ为２．２４％，方法快速、简单，结果准确、重现性好，专属性强，为测定轻身减肥片这一复方制剂中有效成份的含量提供了可靠的方法。 Shimadzu CS-930 thin-layer scanner was used to determine the content of emodin in the weight loss slimming tablet. The wavelength of the sample was 400 nm, the reference wavelength was 600 nm, the linear coefficient SX was 3, and the beam slit was 1.2 mm × 1. 2mm, the method measured emodin in 0.22μg ~ 1.10μg, concentration and peak area was a straight line: r = 0.9990. The recovery rate was 99.8% with a RSD of 2.24%. The method was rapid, simple, accurate, reproducible and specific. It provided a reliable method for the determination of the active ingredient in the compound preparation Methods.