| 摘要 |
A method of performing a turbidimetric assay for an analyte which is a member of an immuno-reaction system involves the use of: first magnetically attractable particles which carry a first species reactive with a member of the immuno-reaction system, but which are not agglutinatable by the analyte; and second particles which carry a second species reactive with a member of the immuno-reaction system. The sample is incubated with the first particles and the second particles, so as to form an agglutinated product containing the first particles to an extent related to the analyte concentration. The agglutinated particles are brought down by means of a magnetic field, and the optical density of the superlatent liquid observed. When the analyte is an antigen or hapten, the first particles preferably carry a monoclonal antibody, and the second particles may carry a different monoclonal or a polyclonal antibody. |
