title: A simplified method for the gas chromatographic determination of pethidine and norpethidine after derivatization with trichloroethyl chloroformate.
mesh_terms: D002725:Chloroform; D002849:Chromatography, Gas; D006801:Humans; D008614:Meperidine / Q000031:analogs & derivatives* / Q000097:blood / Q000302:isolation & purification / Q000378:metabolism*; D010705:Phosgene / Q000031:analogs & derivatives*
chemical_list: D010705:Phosgene; C012586:trichloroethyl chloroformate; D002725:Chloroform; D008614:Meperidine; C002752:normeperidine