Micro-total analysis system non-contact electric conductivity detecting method and apparatus

A micro-full analysis system and non-contact conductance technology, which is applied in the field of analysis technology and devices, can solve the problems of complex electrode processing, high requirements for surrounding environmental conditions, high-frequency signal voltage or high frequency, and achieve good safety and stability. , easy to use, simple process effect

Inactive Publication Date: 2007-03-21
SUN YAT SEN UNIV
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  • Abstract
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Problems solved by technology

[0007] The above method has some disadvantages: the electrode processing is more complicated; the voltage or high fre...

Method used

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  • Micro-total analysis system non-contact electric conductivity detecting method and apparatus
  • Micro-total analysis system non-contact electric conductivity detecting method and apparatus
  • Micro-total analysis system non-contact electric conductivity detecting method and apparatus

Examples

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Embodiment Construction

[0024] Some examples are listed below.

[0025] 1. The chip whose cover or substrate is a thin diaphragm

[0026] (1) Chips of conventional glass substrate and thin glass membrane cover: on the side of the glass with a length of 61mm, a width of 30mm, and a thickness of 1.5mm, the microchannel is etched by a conventional method, and holes are punched at the end of the microchannel as a buffer pool. Get a conventional glass substrate, as shown in Figure 1A. The effective length of the separation channel (a-d-e) is 40mm, and the effective length of the sampling channel (b-c) is 14mm. Another thin glass with a length of 61 mm, a width of 30 mm, and a thickness of 30 μm was used as the membrane cover, as shown in Figure 1B. The cleaned glass substrate and membrane cover were stacked in a muffle furnace and heated to 550°C for 6 hours. Slowly lower the temperature and drop to 100°C after 15 hours. Repeat the process of heating up, keeping warm, and cooling down, and finally coo...

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Abstract

The invention involves the examination method of the analysis system of a kind of miniature whole chemistry and it corresponds of device. Design cover slice or slice of chip a thin film slice; Follow capillary passage in the outside side of film slice to should of the position sticks examination electrode tightly, examining electrode and the capillary passage in the chip not to get in touch with; Input high signal toward the examination electrode, examine the capillary aqua inside the passage at examine electrode the high electric conductivity of the district information, get separation diagram The advantage of the invention lies in a craft in brief and use convenience, can Be stirring up frequency lowery and stirring up electricity lowery function good under the work, safety and stability.

Description

technical field [0001] The invention relates to an analysis technology and a device, in particular to a detection method of a miniature total chemical analysis system and a corresponding device. Background technique [0002] Micro total analysis system (micro total analysis system, micro total analysis system, μ-TAS) is a new technology that integrates sampling, pretreatment, reagent addition, reaction, separation, detection, etc. on a microchip. It has the characteristics of fast speed, large amount of information, less reagent consumption, less pollution, less injection volume, low operating cost, and small instrument volume. [0003] Detection technology is one of the core technologies of the micro-total analysis system, which directly affects the detection object, detection sensitivity, linear range and instrument cost. The current detection techniques mainly include ultraviolet absorption detection, laser-induced fluorescence detection, conductivity detection, amperome...

Claims

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Application Information

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IPC IPC(8): G01N27/07G01R27/02
Inventor 陈缵光李全文李偶连刘翠蓝悠
Owner SUN YAT SEN UNIV
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