研究在硫酸--盐酸介质下,没食子酸与铈(Ⅳ)和罗丹明6G体系的化学发光行为,并对影响化学发光强度的诸因素进行试验和探讨,据此建立了流动注射化学发光法检测没食子酸的新方法.检测的线性范围为1.0×10-8～1.0×10-6g/mL;检出限为3.0×10-9g/mL;对浓度为1.0×10-7g/mL没食子酸连续11次测定,其相对标准偏差为2.1%.该方法应用于清咽片中没食子酸含量的测定,结果满意. The chemiluminescence behavior of gallic acid, cerium (Ⅳ) and rhodamine 6G in sulfuric acid-hydrochloric acid medium was studied and the factors affecting the chemiluminescence intensity were studied and discussed. Flow injection chemiluminescence The linear range of detection was 1.0 × 10-8 ~ 1.0 × 10-6g / mL; the detection limit was 3.0 × 10-9g / mL; the concentration of gallic acid was 1.0 × 10-7g / mL 11 times, the relative standard deviation was 2.1% .The method was applied to the determination of gallic acid in Qingyan tablets and the results were satisfactory.