Microchip for analysis, analysis system having the same, and analysis method
First Claim
1. A microchip for conducting an analysis, the microchip comprising:
- a substrate;
a sample solution supply channel that is formed in the substrate and that supplies a sample solution containing a first substance;
a reaction bath section that is formed in the substrate and that receives the first substance and a second substance that reacts with the first substance in the reaction bath section;
a buffer solution supply channel that is formed in the substrate and that supplies a buffer solution which does not substantially react with the first and second substances;
a waste solution channel that is formed in the substrate and that discharges the sample and buffer solutions to an exterior of the substrate;
a first flow channel formed in the substrate and to which the buffer solution supply channel and the reaction bath section are connected, the first flow channel having first and second valves controllable between open and closed states and disposed between the buffer solution supply channel and the reaction bath section;
a second flow channel formed in the substrate and to which the sample solution supply channel and the waste solution channel are connected, the second flow channel having third and fourth valves controllable between open and closed states and disposed between the sample solution supply channel and the waste solution channel; and
a connecting channel formed in the substrate and connecting the first flow channel to the second flow channel, the connecting channel being disposed at an upstream side of the reaction bath section and the waste solution channel and at a downstream side of the sample solution supply channel and the buffer solution supply channel, and the first and third valves being disposed at an upstream side of the connecting channel and the second and fourth valves being disposed at a downstream side of the connecting channel such that by selectively opening and closing the first, second, third and fourth valves, the buffer solution from the buffer solution supply channel flows first into the reaction bath section at a preselected speed followed by the flow of the sample solution from the sample solution supply channel into the reaction bath section, via the connecting channel, at the preselected speed so that the first and second substances react in the reaction bath section.
1 Assignment
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Accused Products
Abstract
A microchip has a substrate on which there are formed a reaction bath section, a first flow channel to which are connected a supply channel that supplies a buffer solution and the reaction bath section, a second flow channel to which are connected a supply channel that supplies a sample solution containing a first substance and a channel that discharges the sample and buffer solutions to an exterior of the substrate, and a connecting channel connecting the first flow channel to the second flow channel. The reaction bath section receives the first and second substances so that the first and second substances react in the reaction bath section. The first and second flow channels are provided with valves disposed relative to the connecting channel such that selective opening and closing of the valves causes the buffer solution to flow first into the reaction bath section at a preselected speed and the sample solution to flow second into the reaction bath section at the preselected speed to cause the first and second substances to react in the reaction bath section.
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Citations
33 Claims
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1. A microchip for conducting an analysis, the microchip comprising:
- a substrate;
a sample solution supply channel that is formed in the substrate and that supplies a sample solution containing a first substance;
a reaction bath section that is formed in the substrate and that receives the first substance and a second substance that reacts with the first substance in the reaction bath section;
a buffer solution supply channel that is formed in the substrate and that supplies a buffer solution which does not substantially react with the first and second substances;
a waste solution channel that is formed in the substrate and that discharges the sample and buffer solutions to an exterior of the substrate;
a first flow channel formed in the substrate and to which the buffer solution supply channel and the reaction bath section are connected, the first flow channel having first and second valves controllable between open and closed states and disposed between the buffer solution supply channel and the reaction bath section;
a second flow channel formed in the substrate and to which the sample solution supply channel and the waste solution channel are connected, the second flow channel having third and fourth valves controllable between open and closed states and disposed between the sample solution supply channel and the waste solution channel; and
a connecting channel formed in the substrate and connecting the first flow channel to the second flow channel, the connecting channel being disposed at an upstream side of the reaction bath section and the waste solution channel and at a downstream side of the sample solution supply channel and the buffer solution supply channel, and the first and third valves being disposed at an upstream side of the connecting channel and the second and fourth valves being disposed at a downstream side of the connecting channel such that by selectively opening and closing the first, second, third and fourth valves, the buffer solution from the buffer solution supply channel flows first into the reaction bath section at a preselected speed followed by the flow of the sample solution from the sample solution supply channel into the reaction bath section, via the connecting channel, at the preselected speed so that the first and second substances react in the reaction bath section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a substrate;
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21. A microchip for conducting an analysis, the microchip comprising:
- a substrate having a reaction bath section, a first flow channel to which are connected the reaction bath section and a buffer solution supply channel that supplies a buffer solution, a second flow channel to which are connected a sample solution supply channel that supplies a sample solution containing a first substance and a discharge channel that discharges the sample and buffer solutions to an exterior of the substrate, a connecting channel connecting the first flow channel to the second flow channel, first and second valves controllable between open and closed states and disposed in the first flow channel on opposite sides of the connecting channel and between the buffer solution supply channel and the reaction bath section, and third and fourth valves controllable between open and closed states and disposed in the second flow channel on opposite sides of the connecting channel and between the sample solution supply channel and the discharge channel, the reaction bath section being positioned relative to the connecting channel and the first, second, third, and fourth valves so that by selectively opening and closing the first, second, third and fourth valves, the buffer solution from the buffer solution supply channel flows first into the reaction bath section at a preselected speed followed by the flow of the sample solution from the sample solution supply channel into the reaction bath section, via the connecting channel, at the preselected speed so that the first substance reacts with a second substance in the reaction bath section.
- View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A microchip for conducting an analysis, the microchip comprising:
- a substrate having a reaction bath section, a first flow channel to which are connected the reaction bath section and a buffer solution supply channel that supplies a buffer solution, a second flow channel to which are connected a sample solution supply channel that supplies a sample solution containing a first substance and a discharge channel that discharges the sample and buffer solutions to an exterior of the substrate, a connecting channel connecting the first flow channel to the second flow channel, first and second valves disposed in the first flow channel on opposite sides of the connecting channel and between the buffer solution supply channel and the reaction bath section, and third and fourth valves disposed in the second flow channel on opposite sides of the connecting channel and between the sample solution supply channel and the discharge channel, the first, second, third and fourth valves being controllable between open and closed states to extract air from the first flow channel, second flow channel and connecting channel so that by subsequently selectively opening and closing the first, second, third and fourth valves, the buffer solution from the buffer solution supply channel flows first into the reaction bath section at a preselected speed followed by the flow of the sample solution from the sample solution supply channel into the reaction bath section, via the connecting channel, at the preselected speed so that the first substance reacts with a second substance in the reaction bath section.
- View Dependent Claims (32, 33)
Specification