Method and apparatus for photoacoustic immunoassay.

摘要

The present invention enables an analysis of immunoreaction products by an accurate photoacoustic spectrometry without taking into account the differences among individuals, cases and the complications of a sample. In the present invention, a sample of an examined object is divided into two groups, sample A and sample B. Micro particles coated with an antigen or an antibody are added to sample A (the added sample is called sample A min ), the micro particles not coated with the antigen or the antibody are added to sample B (the added sample is called sample B min ). Photoacoustic signal magnitude detected values for both samples A min and B min are acquired and the differential signal between the detected values is made a detected value of the immunoreaction product.