Evaluation of a multiple-variable thin-layer and reversed-phase thin-layer chromatographic scheme for identification of basic and neutral drugs in an emergency toxicology setting.
An analytical scheme composed of one normal-phase thin-layer chromatographic (TLC) method, one reversed-phase thin-layer chromatographic (RPTLC) method, and sequential analyte detection through four stages of color reactions is described. Eighty-one basic or neutral drugs were analyzed with this scheme and seventy-four were uniquely characterized with 95% confidence. Six of the remaining seven formed three unresolved pairs. The scheme was evaluated by mean list length analysis and shown to offer analyte resolution similar to that of a scheme of TLC and gas chromatography (GC) with nonspecific detection. Nine out of ten unknowns from the field of eighty-one drugs were uniquely identified with 95% confidence by the TLC/RPTLC scheme. The tenth unknown was not completely resolved from its isomer, but was statistically the more probable candidate.
Harper
J D
JD
Toxi-Lab, Inc., Irvine, California 92718.
Martel
P A
PA
O'Donnell
C M
CM
D002855:Chromatography, Thin Layer / Q000379:methods; D004630:Emergencies; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011041:Poisoning / Q000175:diagnosis*
D004364:Pharmaceutical Preparations