Patent ID: 8546131

Claim:
A device or kit for detecting a nucleic acid in a sample, comprising: a carrier (a) that holds at least one dye which can bind to a nucleic acid; a path (c) for passing the sample through the carrier (a); and an evaluation part (d) for observing a substance produced by the reaction between the sample and the at least one dye with visible light, and evaluating the presence or absence of a nucleic acid in the sample by eye, which is connected to the carrier (a) by the path (c), and a carrier (b) that holds a substance reactable with a dye, said carrier (b) being disposed between the carrier (a) and the evaluation part (d), wherein the substance reactable with a dye is at least one compound selected from the group consisting of an oxidizing agent, a reducing agent, an acid, a base, and a pH buffering agent, and wherein the reducing agent is at least one reducing agent selected from the group consisting of sodium borohydride, sodium cyanoborohydride, sodium hydrogen sulfite, sodium sulfite, sodium hyposulfite, potassium pyrosulfite, sodium thiosulfate, glutathione, ascorbic acid, 2-mercaptoethanol, DL-dithiothreitol, 1-thioglycerol, cystein, tributyl phosphine, aminoethane thiol, and tris(2-carboxyethyl)phosphine.