title: Plasma pentazocine radioimmunoassay.
abstract: A sensitive and specific radioimmunoassay of dog and human plasma pentazocine is described. Rabbit antiserum and the second antibody method separated bound from free pentazocine. The radioimmunoassay employed an 125I-labeled radioligand and required extraction from the sample prior to quantitation. The method had a detection limit of approximately 200 pg/assay tube (1 ng/ml). The assay was used successfully to measure pentazocine in the plasma of beagle hounds given 0.3 mg of pentazocine/kg iv. The decline in plasma levels fitted a two-compartment body model with a 100-min mean overall half-life and a 3.2-liters/hr mean plasma clearance rate.
mesh_terms: D000818:Animals; D000918:Antibody Specificity; D004285:Dogs; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008954:Models, Biological; D010423:Pentazocine / Q000097:blood* / Q000276:immunology; D011863:Radioimmunoassay
chemical_list: D010423:Pentazocine