放射免疫分析(Radioimmunoassay,RIA)是六十年代初期创立的一种体外的超微量分析方法。它是将放射性同位素示踪技术与免疫化学技术两者结合而建立起来的分析方法。许多药物进入体内后,在血液及组织中仅含有极微量用一般方法及仪器难予甚至不可能检测出来.体外竟争放射分析技术的创立,使药物分析方 Radioimmunoassay (RIA) is an in vitro ultra-trace analysis method established in the early 1960s. It is a combination of radioisotope tracer technology and immunochemical techniques to establish the analysis method. Many drugs into the body, in the blood and tissues containing only a trace amount of difficult to use the general methods and instruments can not be detected in vitro competitive radiometric analysis of the creation of the drug analysis side