Haworth, C A study of the chromatographic behaviour of tryptophan metabolites and related compounds by chromatography on thin layers of silica gel. I. Qualitative separation. [electronic resource] - Journal of chromatography Apr 1972 - 311-9 p. digital Publication Type: Journal Article Standard No.: 10.1016/s0021-9673(01)82294-9 doi Subjects--Topical Terms: Chromatography, Thin LayerGelsHumansIndicators and ReagentsMethodsPhenylketonurias--urineSilicon DioxideSolventsTryptophan--metabolism