Dynamic and complete analysis system for dynamic electric current

A full analysis, current technology, applied in the field of flow analysis technology and full analysis system, can solve the problems of unsuitability for portability, field and process analysis, manufacturing and supporting micro-analytical systems, and large supporting instruments and detectors. The effect of no pulsation, low driving power and high working pressure

Inactive Publication Date: 2006-10-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely small sampling volume, the detection is difficult, and sample enrichment is required. Corresponding supporting analytical instruments and high-sensitivity detectors are used, such as capillary electrophoresis, microchip analyzers, and lasers and photoelectric detection for laser-induced fluorescence. Devices, etc.; the micro-total analysis system is based on capillary, micro-fluidic devices or microchips. To build a micro-total analysis system, it is necessary to develop or select different interface devices, mixed flow circuit substrates or microchips. More troublesome; although the micro-analysis system itself is small in size and consumes less sample reagents, its supporting instruments and detectors are relatively large. This full-analysis system is still a laboratory analysis instrument and is not suitable for portable, on-site and process analysis.

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  • Dynamic and complete analysis system for dynamic electric current
  • Dynamic and complete analysis system for dynamic electric current
  • Dynamic and complete analysis system for dynamic electric current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The electrogalvanic full analysis system consists of three basic analysis units combined with EF connections, including the electroosmotic pump injection reaction unit (see figure 2 a), enrichment functional unit (see figure 2 b), and the micro-column separation detection unit (see figure 2 c). exist figure 2 In , parts a, b and c in dotted boxes respectively show the schematic diagrams of the analysis flow paths of the three analysis units.

[0038] Electroosmotic pump injection reaction unit a is composed of an electroosmotic pump P, a solution storage ring HC and two electromagnetic switching valves V1 and V2, see figure 2 part a of Its analysis functions include sample and reagent solution injection, reaction and temporary storage in the storage ring HC, and transport of the reaction solution to the lower analysis unit. The electroosmotic pump P consists of a side-closed porous glass sand core column placed in the middle of the pump body, pump chambers at ...

Embodiment 2

[0050] The injection, reaction, enrichment and detection analysis system is composed of an electroosmotic pump injection reaction unit a, an enrichment functional unit b, and a microcolumn separation detection unit c, the flow path of which is shown in image 3 . The electroosmotic pump P used in this example is the same as that of Example 1, and the size of the solid-phase extraction microcolumn EC used is the same as that of Example 1, filled with 60-100 mesh carboxylic acid-type cation exchange resin for enriching cationic drug propranolol and metoprolol. The analysis process is as follows: connect the output terminal 3 of the electroosmotic pump into the reaction unit a to the input terminal 5 of the enrichment functional unit b, connect the terminal 6 of the enrichment functional unit b to the solid phase extraction microcolumn EC, and connect the output terminal of the EC to the microcolumn EC. The 11th end of the base tee of the column separation detection unit c, the ...

Embodiment 3

[0052] The injection, reaction, separation and detection and analysis system is combined and connected by an electroosmotic pump injection reaction unit a and a microcolumn separation detection unit c, and its flow path is shown in Figure 4 . In this example, electroosmotic pump P pressure and electrokinetic action are combined to drive the analysis solution and mobile phase to realize micro-column electrochromatographic separation. Due to the high porosity (50-60%) and low back pressure (0.1-0.4 MPa) of the high specific surface area monolithic column, the pressure provided by the electroosmotic pump P can meet the separation requirements of the electrochromatographic microcolumn. The inner diameter of the quartz tube electrochromatographic separation micro-column SC is 1-3 mm, and the column length is 10 cm. The integral column bed is synthesized by tetraethyl orthosilicate-hydrochloric acid-polyethylene glycol sol-gel method and fine quartz sand. Chromatographic Separatio...

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Abstract

The disclosed electrokinetic current full analysis system comprises: an electro osmosis pump injection unit, an enrichment function unit, a micro-column separation detecting unit, a fiber spectrograph, a dc high-voltage stabilized power, and a microcomputer; both electro osmosis pump and electrokinetic for transport and separation; solenoid switch valve to control current direction ; both quartz tube electrophoresis and electrochromatography column filled with fine sand as heat-conducting medium to reduce current channel section.This invention has field micro-column electrophoresis / chromatogram / electrochromatography function with high sensitivity and simple structure.

Description

Technical field: [0001] The invention belongs to the technical field of chemical analysis instruments, in particular to flow analysis technology and a total analysis system. Background technique: [0002] Since the Netherlands "Journal of Analytical Chemistry" (Anal.Chim.Acta) 75 years 78 pages 145 to 157 proposed flow injection analysis technology and 90 years 237 pages 329 to 343 the sequential injection analysis technology, flow analysis technology has become Commonly used solution handling analytical techniques. The flow analysis system can implement analysis functions such as sample injection, solution transportation, analysis reaction and sample enrichment, and can be combined with various analytical instruments for detection. However, the conventional flow analysis system does not have a suitable high-efficiency separation column, and the output pressure of the peristaltic pump is low and the flow rate is pulsating, while the suction step of the syringe pump can only...

Claims

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Application Information

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IPC IPC(8): G01N27/27G01N27/416
Inventor 何友昭王晓葵邓宁王蕾韩芳
Owner UNIV OF SCI & TECH OF CHINA
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