[Radioimmunoassays. Their application in toxicology (author's transl)].

The assays of toxic substances are often tedious and sometimes very difficult, due to the necessity of extraction from the biological fluids. This technical problem is avoided by radio-immuno-assay (RIA), and for this reason this methodology is increasing very rapidly in Toxicology. The authors review these RIA used presently in the field of toxic drugs and environmental polluants.