| 摘要 |
PURPOSE:To enhance accuracy in analysis, by including the fine powder of titanium dioxide, which has not undergone specified surface treatment, in a light shielding layer on a reagent layer, thereby eliminating errors caused by the interfering action of a fluoride. CONSTITUTION:A reagent layer, a light shielding layer, and a porous developing layer are provided in this order on a supporting body having water impermeability and light transmitting property such as a transparent polymer sheet characterized by poor hydrophilic property such as cellulose acetate. The reagent layer is prepared by including a hydrogen peroxide indicator, which yields the change that can be detected under the presence of peroxidase and hydrogen peroxide, peroxidase, and oxidase in a polymer binder. The fine powder of titanium dioxide, which has not undergone surface treatment including aluminum oxide or the hydrated oxide of aluminum, or the fine powder of titanium dioxide, which has not undergone surface treatment, is included in the light shielding layer characterized by oxygen permeability and protein impermeability on the reagent layer. Thus interference by fluoride can be eliminated. |
