Determination of morphine and its major metabolite, morphine-3-glucuronide, in blood by high-performance liquid chromatography with electrochemical detection.
The construction of an electrochemical detector flow cell for high-performance liquid chromatography from stainless steel, which also serves as the auxiliary electrode, is described. Glassy carbon is used for the working electrode in a novel configuration based on a hybrid of the wall-jet and thin-layer arrangements. Application of the detector to the determination of morphine in small blood samples is described. The metabolite, morphine-3-glucuronide, is also determined by hydrolysis with beta-glucoronidase prior to extraction. The detector is capable of detecting less than 1 ng of morphine injected.
D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods; D005965:Glucuronates / Q000097:blood; D006801:Humans; D009020:Morphine / Q000097:blood*; D009022:Morphine Derivatives / Q000097:blood*; D013329:Structure-Activity Relationship
D005965:Glucuronates; D009022:Morphine Derivatives; D009020:Morphine; C018108:morphine-3-glucuronide