Immunofixation electrophoresis is an analytical technique with high resolving power as it combines separation of antigens by electrophoresis with immunodiffusion against an antiserum.

Immunofixation electrophoresis (IFE) is a technique for the identification of proteins within complex mixtures after separation by either conventional zone electrophoresis or isoelectric focusing.

血免疫固定电泳（immunofixation electrophoresis，IFE）指对血清中的各种蛋白成分进行分离，用于区分蛋白的类型。 常用于单克隆免疫球蛋白增殖病、本周氏蛋白和游离轻链病、重链病、多组分单克隆免疫球蛋白病、定位蛋白图谱中的寡克隆、多克隆免疫球蛋白病等多种免疫疾病的辅助诊断。 免疫固定电泳是一种包括琼脂凝胶蛋白电泳和免疫沉淀两个过程的操作。