title: Recovery of micro-quantities of steroids from silica gel following repeated thin-layer chromatography.
mesh_terms: D002247:Carbon Isotopes; D002855:Chromatography, Thin Layer; D005782:Gels; D008722:Methods; D011874:Radiometry; D012822:Silicon Dioxide
chemical_list: D002247:Carbon Isotopes; D005782:Gels; D012822:Silicon Dioxide