IRadioimmunoassay for Phenobarbital

Abstract
A radioimmunoassay for phenobarbital has been investigated. Antiphenobarbital antisera were obtained by single immunization or repeated immunization of rabbits with p-azophenobarbital protein. The conditions for radioimmunoassay using 14C-phenobarbital (specific activity 3.15 mCi/mmole) and 3H-phenobarbital (specific activity 10.3 Cimmole) are described. Eighty picograms of phenobarbital could be detected by this technique. The determination of serum phenobarbital concentration in the mouse after intraperitoneal administration was carried out.

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