Biou et al.r Radial (hin layer chromatography for the diagnosis of mono-and disaccharide disorders 397 Summary: The authors propose a radial thin layer Chromatographie method for the Separation of mono-and disaccharides, which shows better resolution, and is more sensitive (0.25 g for glucose) and less time-consuming (20 min) than the linear technique. Moreover, the procedures used for the detection of sugars and their dansyl-derivatives (staining with naphthoresorcinol and fluorescence of the dansyl-hydrazones) make the identification more specific and reliable. This simple method is quite suitable for the analysis of biological samples (urine, faeces) and the diagnosis of metabolic disorders in children. Eine zuverlässige und schnelle radiale dünnschichtchromatographische Methode zur Diagnose von Mono-und Disaccharid-Stoffwechselstörungen