Multichannel microdroplet detection chip for nucleic acid detection
A detection chip, multi-channel technology, applied in specific-purpose bioreactors/fermenters, enzymology/microbiology devices, and microbial determination/inspection, etc. Detection throughput requirements, long detection time and other problems, to achieve the effect of preventing nucleic acid cross-contamination, simple structure, and reducing processing difficulty
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Embodiment 1
[0039] Such as figure 1 , figure 2 and Figure 4 As shown, a multi-channel droplet detection chip for nucleic acid detection, which is sequentially provided with a cover layer 1, a channel layer 2 and a substrate layer 3 from top to bottom; the material of the substrate layer 3 is selected from glass, polydimethyl One of siloxane, polymethyl methacrylate, polycarbonate, polytetrafluoroethylene, heat-resistant scotch tape, polyethylene terephthalate film; the material of the channel layer 2 is polydimethyl One of siloxane, polymethyl methacrylate, polycarbonate, glass or polytetrafluoroethylene; the material of the cover layer 1 is selected from one of glass, polymethyl methacrylate or polycarbonate. The lamination method of the substrate layer 3 , the channel layer 2 and the cover sheet layer 1 is one of thermal bonding, heat-resistant scotch tape bonding, heat-resistant glue bonding or oxygen plasma treatment.
[0040] Wherein, several independent detection units 2a are a...
Embodiment 2
[0051] Such as figure 1 , image 3 and Figure 4 As shown, a multi-channel droplet detection chip for nucleic acid detection, which is sequentially provided with a cover sheet layer 1, a channel layer 2 and a substrate layer 3 from top to bottom;
[0052] Wherein, several independent detection units 2a are arranged in the channel layer 2;
[0053] Each detection unit 2a includes a dispersed phase hole 201, a sample injection hole 202 and a reaction chamber 203;
[0054] After the dispersed phase hole 201 and the sample injection hole 202 converge through the first microchannel 205 and the second microchannel 206 respectively, they are connected to the reaction chamber 203 through the third microchannel 207;
[0055] A reaction chamber main hole 204b is also provided in the channel layer 2, and the reaction chamber main hole 204b communicates with the reaction chamber 203 of each detection unit 2a through the fifth microchannel 208b.
[0056] Wherein, the two sides of the mul...
Embodiment 3
[0059] The application of the multi-channel droplet detection chip in embodiment 1 or embodiment 2 in digital nucleic acid detection can be applied to droplet preparation, nucleic acid amplification and detection, specifically through the following steps:
[0060] (1) Mix the target DNA molecule with the isothermal amplification reaction reagent, add it to the sample injection hole 202, and add the fluorinated oil containing the fluorinated surfactant to the dispersed phase hole 201;
[0061] (2) When the pressure driving system is a vacuum negative pressure system, the vacuum negative pressure system is sealed and connected to the reaction chamber hole 204a (or the reaction chamber main hole 204b), and vacuumed to make the vacuum degree reach 5-50kPa. After the vacuum degree is stable, open the solenoid valve; (or when the pressure drive system is a syringe pump positive pressure system, connect the syringe pump positive pressure system to the sample injection hole 202 and the...
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