液体沉淀反应早在上一世纪末就已经为人们所发现,从此以后受到了学者们多方的研究。关于沉淀反应的第一个定量的理论是由 Hejdelberger 和 Kendall 所提出,他们发现,在抗体过量的条件下,沉淀物中抗体与抗原之比呈线性亟线。据此可以估算待查血清中的抗体浓度,其前提是:在过量抗体区 Liquid deposition reaction as early as the end of the last century has been found for people, since then by scholars from various aspects of research. The first quantitative theory of the precipitation reaction was proposed by Hejdelberger and Kendall. They found that the antibody-antigen ratio in the precipitates was linearly linear in the presence of excess antibody. From this we can estimate the concentration of antibody in the serum to be investigated on the premise that: in the area of ​​excess antibody