本文阐述了血清、尿液及激活淋巴细胞悬浮培养液中白细胞介素-2水平测定的放射免疫分析方法。该方法特异性强,与其它免疫因子和类似物的交叉反应率均〈0.01％,测定的灵敏度达1ng/ml。关于RIA的质量控制,保持标准品H-2的免疫活性是关键,当然~(125)I-IL-2的比活度和抗血清的质量也是很重要的。 This article describes the radioimmunoassay of serum, urine and interleukin-2 levels in activated lymphocyte suspension cultures. This method is highly specific, has cross-reactivity with other immune factors and analogs <0.01% and has a sensitivity of 1 ng / ml. Regarding the quality control of RIA, it is important to maintain the immunogenicity of standard H-2. Of course, it is also important that the specific activity of (125) I-IL-2 and the quality of antiserum be maintained.