several laboratory methods are currently available for the detection of barbiturates , but few are suitable for emergency use , the authors evaluated use of an ultraviolet spectrophotometric method as a screening procedure and compared the results with results obtained by other barbiturate methods ( colorimetric , gas-liquid chromatographic , and immunochemical ) , procedure time was approximately 40 minutes , sensitivity 0.2 mg/dl , precision ( coefficient of variation ) 5.4 % , recovery 97.8 % for phenobarbital , and there was good correlation with results obtained by gas-liquid chromatography and the emit system for phenobarbital .
C0220825
evaluated
C0184661
procedure