Method of measuring concentration of immunoreactant using electrochemiluminescence
申请人:TDK Corporation
公开号:EP0522677A1
公开(公告)日:1993-01-13
A method of measuring the concentration of an immunoreactant, such as antigen or antibody, in a liquid sample by use of an electrode on which is immobilized a complementary immunoreactant, such as antibody or antigen, capable of specifically reacting with the immunoreactant. An immunoreactant or complementary immunoreactant labeled with a chemiluminescent acridinium compound is bound to an electrode by an antibody-antigen reaction. By use of the electrode with the labeled immunoreactant bound thereon, electrochemical reduction of dissolved oxygen in an electrolytic solution is carried out to generate hydrogen peroxide on the electrode. The hydrogen peroxide triggers chemiluminescence, and the amount of luminescence is measured. According to the method, the amount of luminescence changes correspondingly to minute change in the concentration of the immunoreactant to be measured in the liquid sample and, therefore, it is possible to measure the concentration of the immunoreactant extremely accurately.
一种测量液体样品中免疫反应物(如抗原或抗体)浓度的方法,使用的电极上固定有能与免疫反应物发生特异性反应的互补免疫反应物(如抗体或抗原)。用化学发光吖啶化合物标记的免疫反应物或互补免疫反应物通过抗体-抗原反应与电极结合。通过使用结合了标记免疫反应物的电极,电解溶液中的溶解氧被电化学还原,在电极上生成过氧化氢。过氧化氢引发化学发光,发光量被测量。根据该方法,发光量随液体样品中待测免疫反应物浓度的微小变化而相应变化,因此可以极其精确地测量免疫反应物的浓度。