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Circulating electrochemical extraction device and application thereof

An extraction device and electrochemical technology, applied in the field of analysis and detection, can solve the problems of insufficient selectivity and quantitative dissolution

Pending Publication Date: 2020-10-27
DALIAN CHENGZE TESTING SERVICES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selectivity is not enough, and the target substance is only enriched on the electrode surface, and cannot be dissolved quantitatively.

Method used

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  • Circulating electrochemical extraction device and application thereof
  • Circulating electrochemical extraction device and application thereof
  • Circulating electrochemical extraction device and application thereof

Examples

Experimental program
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Embodiment Construction

[0023] Clenbuterol hydrochloride standard solution preparation: Take 10 microliters of the above-mentioned standard substance and dilute to 10 ml with the above-mentioned buffer solution. The initial concentration of the test solution is 1×10 -10 g / µl.

[0024] Extraction Status Workstation 6 ( figure 1 ) mode of operation: linear sweep stripping voltammetry. The corresponding three-electrode system is: working electrode-self-made extraction electrode [13] ; Auxiliary electrode - platinum wire electrode; Reference electrode - silver / silver chloride electrode. Electrolytic cell volume: 100 microliters. Standard: clenbuterol hydrochloride (100 μg / mL, 0.5 mL). Buffer solution: 0.1 mol / L potassium sodium tartrate buffer solution (pH 7).

[0025] Determination Method Workstation mode of operation. figure 1 The three-electrode system in workstation 1 was cyclic voltammetry.

[0026] Three-electrode system: working electrode-glassy carbon electrode; auxiliary electrode-pl...

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Abstract

The invention discloses an electrochemical extraction device. The device can complete electrochemical extraction or determination of a target object in a complex sample in a stripping voltammetry mode. The electrochemical extraction device is composed of an electrochemical workstation, an electrochemical extraction pool, a peristaltic pump, a liquid conveying guide pipe, a three-way flow control valve, a liquid storage pool and the like. As the sample solution circularly flows in the micro-flow electrolytic tank, the working electrode begins to enrich the target object in the sample solution under the enrichment potential. After the set time is reached, the optimized eluent flows through the micro-pool under the dissolution potential of the target object through flow path switching, at themoment, the enriched substances on the electrode are released into the micro-pool, and finally the enriched substances enter the eluent through a pipeline to finish micro-extraction. According to thedevice, the extraction selectivity and the extraction rate are effectively improved, and the sample treatment cost and the environmental pollution degree generated by extraction are reduced.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a circulating electrochemical extraction device and a use method thereof. Background technique [0002] Most current sample extraction methods require expensive instruments [1～3] , The operation process is complex and cumbersome, the consumption is long, and the extraction rate is low and cannot meet the detection requirements [4～10] . In recent years, the application of electrochemical methods in the sample pretreatment process has been reported [11、12] . The reported technique is to use the enrichment effect of the electrode for extraction, which is simple and effective. However, the selectivity is not enough, and the target substance is only enriched on the electrode surface, and cannot be dissolved quantitatively. [0003] The development of sample pretreatment technology with high enrichment multiple, good accuracy and precision, simple and fast, less env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/40G01N27/48
CPCG01N1/40G01N1/4044G01N27/48G01N1/4055G01N2001/4061G01N2001/4038
Inventor 申贵隽丁利葳于蕾季杨杨马超凡
Owner DALIAN CHENGZE TESTING SERVICES