Abstract: A method is provided for measuring glycated hemoglobin in a hemoglobin-containing sample which comprises reacting glycated hemoglobin in the hemoglobin-containing sample with an enzyme that catalyzes a reaction of oxidizing the glycated hemoglobin to generate hydrogen peroxide, in the presence of at least one anionic surfactant selected from the group consisting of N-acyl taurine in which a hydrogen atom of the amino group may be substituted with a substituent, alkyl sulfoacetic acid, polyoxyethylene alkyl ether acetic acid, N-acyl amino acid in which a hydrogen atom of the amino group may be substituted with a substituent, polyoxyethylene alkyl ether phosphoric acid, polyoxyethylene polycyclic phenyl ether phosphoric acid, alkyl phosphoric acid, and salts thereof, to generate hydrogen peroxide, and measuring the generated hydrogen peroxide.

Abstract: A feces sampling container having an increased storage stability of a component in a feces sample such as hemoglobin to enable the measurement of a component in a feces sample with a small amount of feces collected. The container includes a container body, and a feces sampling stick having a gripping part on one side and a stick part on the other side, the stick part having a feces sampling part in the vicinity of the tip, wherein the container body comprises an opening part through which the feces sampling part of the feces sampling stick is inserted, and a feces container chamber in which a desiccant is enclosed, wherein the feces sample held by the feces sampling part is dried by a contact of the feces sampling part, which is inserted through the opening part and holding the feces sample, with the desiccant.

Abstract: A method for measuring fibroblast growth factor-23 (hereinafter, indicated as FGF-23) in a sample, which comprises the steps of: (1) reacting in an aqueous medium, a sample and a first antibody or an antibody fragment thereof which binds to FGF-23; (2) reacting in an aqueous medium, a second antibody or an antibody fragment thereof which binds to FGF-23 with Immunocomplex 1 produced in the aforementioned step (1) to produce Immunocomplex 2 consisting of the first antibody or the antibody fragment thereof which binds to FGF-23, FGF-23, and the second antibody or the antibody fragment thereof which binds to FGF-23; and (3) measuring Immunocomplex 2 produced in the aforementioned step (2); wherein the reaction of step (1) and/or step (2) is carried out in an aqueous medium comprising a surfactant such as a polyoxyethylene alkyl ether.