Microfluidic chip for detecting heavy metal ions in water and detection method

A heavy metal ion, microfluidic chip technology, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as low integration, affect detection accuracy, and complex detection process, so as to reduce production costs and The cost of use, the elimination of preprocessing, and the simple effect of the detection process

Inactive Publication Date: 2016-03-23
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] First, because the traditional detection equipment is jointly completed by multiple components, the integration degree is low, so these detection equipment have large volume, high quality, and high power consumption. The three "big" problems increase the production cost and use cost of the equipment;
[0004] Second, because some traditional detection equipment only focus on the heavy metal ions to be detected, and lack the function settings to shield other interferences, these

Method used

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  • Microfluidic chip for detecting heavy metal ions in water and detection method
  • Microfluidic chip for detecting heavy metal ions in water and detection method
  • Microfluidic chip for detecting heavy metal ions in water and detection method

Examples

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specific Embodiment 1

[0058] This embodiment is an embodiment of a microfluidic chip for detecting heavy metal ions in water.

[0059] The structure diagram of the microfluidic chip for detecting heavy metal ions in water in this embodiment is as follows figure 1 shown. The microfluidic chip includes microchannels and microvalves,

[0060] The microchannels include reference microchannels 11, ion imprinting microchannels 12, electrophoresis sampling microchannels 13, electrophoretic separation microchannels 14, connecting microchannels 15, waste liquid discharge microchannels 16 and buffer solution discharge microchannels 17;

[0061] The microvalve includes a reference port outlet microvalve 21, an ion imprint outlet microvalve 22, a waste liquid outlet microvalve 23, a buffer stop microvalve 24 and a sample injection stop microvalve 25;

[0062] The electrophoresis sampling microchannel 13 and the electrophoretic separation microchannel 14 are arranged successively according to the flow directi...

specific Embodiment 2

[0066] This embodiment is an embodiment of a microfluidic chip for detecting heavy metal ions in water.

[0067] The microfluidic chip for detecting heavy metal ions in water in this embodiment, on the basis of the specific embodiment 1, further defines the chip, including a substrate layer 1, a thin film layer 2, a microvalve through-hole layer 3 and a gas-liquid connection from bottom to top. Layer 4;

[0068] The schematic diagram of the structure of the substrate layer 1 is as figure 2 As shown, the substrate layer 1 is provided with a reference microchannel 11, an ion imprinting microchannel 12, an electrophoretic sampling microchannel 13, an electrophoretic separation microchannel 14, a connecting microchannel 15, a waste liquid discharge microchannel 16 and a buffer solution discharge microchannel 17 A plurality of electrophoretic electrodes 30 are also provided, and the electrophoretic electrodes 30 are respectively connected with the electrophoretic sampling microch...

specific Embodiment 3

[0077] This embodiment is an embodiment of a microfluidic chip for detecting heavy metal ions in water.

[0078] The microfluidic chip for detecting heavy metal ions in water in this embodiment, on the basis of the above embodiments, further limits the number of ion-imprinted microchannels 12, and each ion-imprinted microchannel contains ion-imprinted polymers capable of adsorbing different heavy metal ions .

[0079] The ion-imprinted microchannel 12 is technically limited to a plurality of ion-imprinted microchannels 12, and it is possible to place imprinted polymers that adsorb different heavy metal ions in different ion-imprinted microchannels 12, thereby achieving the function of detecting multiple heavy metal ions with one device.

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Abstract

The invention belongs to the field of environmental protection, and particularly relates to a microfluidic chip for detecting heavy metal ions in water and a detection method. The microfluidic chip comprises micro-channels and micro-valves, wherein the micro-channels comprise a reference micro-channel, an ion imprint micro-channel, an electrophoresis sample introduction micro-channel, an electrophoresis separation micro-channel, a connection micro-channel, a waste liquor exhaustion micro-channel and a buffer solution exhaustion micro-channel; the micro-valves comprise a reference end outlet micro-valve, an ion imprint exit micro-valve, a waste liquor exit micro-valve, a buffer solution cut-off micro-valve and a sampling cut-off micro-valve. The detection method comprises the following steps: acquiring a first electropherogram of cross electrophoresis before heavy metal ion adsorption; then, acquiring a second electropherogram of cross electrophoresis after heavy metal ion adsorption; finally, recognizing specific heavy metal ions according to the difference between the two electropherograms, and calculating heavy metal contents. The microfluidic chip and the detection method have the advantages that not only are the production cost and the use cost very low, but also the anti-interference ability is very high; moreover, the detection process is simple, and the detection time is short.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a microfluidic chip and method for detecting heavy metal ions in water. Background technique [0002] Heavy metal ions in water will not only damage the ecological environment, but also threaten human health. Therefore, it is necessary to detect heavy metal ions in water. Traditional heavy metal ion detection equipment includes detection equipment based on colorimetry, detection equipment based on atomic absorption spectroscopy, and detection equipment based on biosensing, etc. These traditional equipment have played an important role in the field of heavy metal ion detection. However, in During the process of use, it was found that these traditional devices also had the following problems: [0003] First, because the traditional detection equipment is jointly completed by multiple components, the integration degree is low, so these detection equipment have la...

Claims

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Application Information

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IPC IPC(8): G01N27/447
CPCG01N27/447
Inventor 孙凯江雷任南琪
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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