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放射免疫分析法(Radioimmlunoassay,简称 RIA)是一种将同位素的放射测量与免疫反应原理相结合的高灵敏度的微量分析法。由于标记抗原比度不断提高,目前 RIA的测定灵敏度已达微微克(10~(12)克,pg)水
Radioimmunoassay (RIA) is a highly sensitive microanalysis that combines the radiometric and radioactive isotope measurements of isotopes. As the ratio of labeled antigen continues to increase, the sensitivity of RIA has now been measured to be in the microgram range (10 to 12 grams, pg) of water