Fatty acid methyl esters were analyzed by gas chromatography as described above. |
The charcoal tubes were desorbed with 1 ml of methylene chloride and analyzed by gas chromatography and mass spectrometry. |
Traditional toxicology screens that employ thin-layer chromatography can detect MDMA metabolites in the urine. |
Steam distillation or chromatography of wood and wood residues can release terpenes. |
Final separation was achieved by fast protein liquid chromatography, followed by dialysis and lyophilization, resulting in a white powder. |
The extracts obtained were prefiltered through glass wool and sodium sulfate anhydride and filtered by column chromatography. |