Abstract: The present analysis method for analyzing a sample uses capillary electrophoresis by applying a voltage to a sample solution introduced to a micro flow path, performing separation analysis for a component contained in the sample solution, and measuring an optical measurement value at a measurement section of the micro flow path corresponding to an elapsed time after a start of measurement.

Abstract: The disclosure provides an analysis chip that includes a microchip employing capillary electrophoresis and a cartridge.

Abstract: A method for analyzing a sample using capillary electrophoresis is provided. By the method, following steps are performed. First, an original sample and an anionic group-containing compound are fixed to form a mixed sample, where the original sample contains an analysis component to be analyzed and a sub component other than the analysis component. Then, an aggregate of the sub component and the anionic group-containing compound is removed from the mixed sample. Then, electrophoresis is performed in a capillary tube with respect to a complex in which the analysis component and the anionic group-containing compound are bound to each other, while the mixed sample is continuously supplied.

Abstract: An analytical tool for use in analysis of a sample is provided. The analytical tool includes a first unit and a second unit. The first unit has an analysis portion where analysis is performed. The second unit, configured to be coupled with the first unit, has a liquid reservoir for confining a particular liquid used for the analysis of the sample. When the first unit and the second unit are coupled, a fluid passage for conducting the particular liquid from the liquid reservoir into the first unit is formed by only a part of the first unit, or only a part of the second unit, or a combination of respective parts of the first unit and the second unit.

Abstract: A method for manufacturing a chip that includes a microchannel is described, wherein the method includes the steps of: fixing a cationic polymer having a quaternary onium group to at least one surface of each of a pair of resin substrates; and joining the resin substrates together on the surfaces on which the cationic polymer has been fixed.

Abstract: A method is provided for analyzing a sample using capillary electrophoresis. According to the method, an electrophoretic liquid filling step is performed for filling a capillary tube with an electrophoretic liquid. In an introducing step, a predetermined amount of sample is introduced to an introducing tank linked to the capillary tube. In a flow step, performed after the introducing step, the sample is caused to flow in the introducing tank, thereby generating a shear flow at a link portion between the capillary tube and the introducing tank. In an electrophoresis step, electrophoresis is performed in the capillary tube while the sample is continuously supplied.

Abstract: One embodiment of the invention provides: a microchip including a sample collection section and an analysis section, in which the sample collection section and the analysis section are imparted with both hydrophilicity and a positively-charged layer; an analysis system including the microchip; and a method of producing the microchip. The microchip includes: a sample collection section for collecting a sample; and an analysis section for analyzing the sample. In the microchip, a cationic polymer bonded with a hydrophilization substance is immobilized on inner walls of the sample collection section and the analysis section.

Abstract: An analysis chip for capillary electrophoresis includes a capillary tube, and a filter that is provided upstream of the capillary tube. The chip can also include an introducing tank connected to one end of the capillary tube, and a discharging tank connected to another end of the capillary tube.

Abstract: An analytical tool is provided for analysis of a sample by capillary electrophoresis. The analytical tool includes an inlet reservoir into which a sample is introduced, a capillary tube in communication with the inlet reservoir, a filter through which a liquid from the inlet reservoir passes, an enlarged portion undergoing a sudden increase in a cross-sectional area and being in communication with the inlet reservoir and the capillary tube, and a pressure fluctuation reducer for preventing pressure fluctuation at the enlarge portion from affecting a liquid in the capillary tube.

Abstract: Provided are a sample analysis method using capillary electrophoresis capable of enhancing analysis accuracy, a solution for capillary electrophoresis, and a sample analysis kit. The sample analysis method includes separating and/or detecting a substance to be analyzed in a sample through capillary electrophoresis, in which the substance to be analyzed is separated and/or detected in the presence of a pH buffer substance and a non-surfactant-type zwitterionic substance. Further, the solution for capillary electrophoresis contains a pH buffer substance, a non-surfactant-type zwitterionic substance, and water.

Abstract: A liquid reagent of a stabilized thyroid hormone-immobilized carrier, by which a thyroid hormone can be measured easily in a short time and at low cost, is provided. The liquid reagent of a thyroid hormone-immobilized carrier according to the present invention includes: a thyroid hormone-immobilized carrier; and a solvent, and a pH of the solvent containing the thyroid hormone-immobilized carrier is in a range from 8.7 to 11.5. The detection of a thyroid hormone using the liquid reagent of the present invention can be carried out by competitively binding a thyroid hormone in a sample and the thyroid hormone-immobilized carrier in the liquid reagent with an anti-thyroid hormone antibody and detecting a composite of the thyroid hormone-immobilized carrier and the anti-thyroid hormone antibody.

Abstract: Provided is a buffer composition capable of suppressing temperature dependency of the pH of a buffer solution, and a specimen analysis method and a specimen analysis system using the buffer composition, wherein the buffer composition contains a buffer substance A showing a positive correlation between temperature and pH and a buffer substance B showing a negative correlation between temperature and pH.

Abstract: An analytical tool for use in analysis of a sample is provided. The analytical tool includes a first unit and a second unit. The first unit has an analysis portion where analysis is performed. The second unit, configured to be coupled with the first unit, has a liquid reservoir for confining a particular liquid used for the analysis of the sample. When the first unit and the second unit are coupled, a fluid passage for conducting the particular liquid from the liquid reservoir into the first unit is formed by only a part of the first unit, or only a part of the second unit, or a combination of respective parts of the first unit and the second unit.

Abstract: A sample analysis method capable of improving separation accuracy of at least one of hemoglobin A2 and hemoglobin S and downsizing an analysis device is provided. The method includes separating hemoglobin in a sample in an alkaline solution containing a cationic polymer by capillary electrophoresis.

Abstract: A method is provided for analyzing a sample using capillary electrophoresis. According to the method, an electrophoretic liquid filling step is performed for filling a capillary tube with an electrophoretic liquid. In an introducing step, a predetermined amount of sample is introduced to an introducing tank linked to the capillary tube. In a flow step, performed after the introducing step, the sample is caused to flow in the introducing tank, thereby generating a shear flow at a link portion between the capillary tube and the introducing tank. In an electrophoresis step, electrophoresis is performed in the capillary tube while the sample is continuously supplied.

Abstract: A method for analyzing a sample using capillary electrophoresis is provided. By the method, following steps are performed. First, an original sample and an anionic group-containing compound are fixed to form a mixed sample, where the original sample contains an analysis component to be analyzed and a sub component other than the analysis component. Then, an aggregate of the sub component and the anionic group-containing compound is removed from the mixed sample. Then, electrophoresis is performed in a capillary tube with respect to a complex in which the analysis component and the anionic group-containing compound are bound to each other, while the mixed sample is continuously supplied.

Abstract: Provided is a buffer composition capable of suppressing temperature dependency of pH of a buffer solution, and a specimen analysis method and a specimen analysis system using the buffer composition, wherein the buffer composition comprises a buffer substance A showing a positive correlation between temperature and pH and a buffer substance B showing a negative correlation between temperature and pH.

Abstract: A method for manufacturing a chip that includes a microchannel is described, wherein the method includes the steps of: fixing a cationic polymer having a quaternary onium group to at least one surface of each of a pair of resin substrates; and joining the resin substrates together on the surfaces on which the cationic polymer has been fixed.

Abstract: Provided are a sample analysis method using capillary electrophoresis capable of enhancing analysis accuracy, a solution for capillary electrophoresis, and a sample analysis kit. The sample analysis method includes separating and/or detecting a substance to be analyzed in a sample through capillary electrophoresis, in which the substance to be analyzed is separated and/or detected in the presence of a pH buffer substance and a non-surfactant-type zwitterionic substance. Further, the solution for capillary electrophoresis contains a pH buffer substance, a non-surfactant-type zwitterionic substance, and water.

Abstract: A liquid reagent of a stabilized thyroid hormone-immobilized carrier, by which a thyroid hormone can be measured easily in a short time and at low cost, is provided. The liquid reagent of a thyroid hormone-immobilized carrier according to the present invention includes: a thyroid hormone-immobilized carrier; and a solvent, and a pH of the solvent containing the thyroid hormone-immobilized carrier is in a range from 8.7 to 11.5. The detection of a thyroid hormone using the liquid reagent of the present invention can be carried out by competitively binding a thyroid hormone in a sample and the thyroid hormone-immobilized carrier in the liquid reagent with an anti-thyroid hormone antibody and detecting a composite of the thyroid hormone-immobilized carrier and the anti-thyroid hormone antibody.