Carrier for immunochemical measurement

A process for preparing a reaction system for immunochemical measurement comprising blood cells which are bound to tannic acid in the proportion of 30 to 500 mg of tanic acid per 1 ml of the blood cells and an antigen or antibody, which process comprises the steps of reacting a blood cell suspension prepared by suspending blood cells in a buffer solution with a tannic acid solution, the concentrations and mixing ratio of said solutions being such as to bind 30 to 500 mg of tannic acid to 1 ml of blood cell to provide a carrier, and then sensitizing said carrier with an antigen or antibody.

A process for preparing a reaction system for immunochemical measurement comprising blood cells which are bound to tannic acid in a proportion of 30 to 500 mg of tannic acid per 1 ml of the blood cells, which process comprises the steps of reacting blood cells and tannic acid in a buffer solution so that 30 to 500 mg of tannic acid is bound to each ml of blood cells to form a carrier and then sensitizing said carrier with an antigen or antibody.