 E wezụga ụkpụrụ nlekọta siri ike na SOP, ihe ndị yiri ya ga-enye aka na nhazi usoro, nyochaa ngwaahịa, dị ka igwe HPLC igwe arụmọrụ chromatography, gas chromatography gas, LC MS igwe-chromatography-mass spectrometry igwe, wdg. 