Thin-layer long optical distance spectrum electrochemical pool with capillary interface

Abstract

The invention relates to a thin-layer long optical distance spectrum electrochemical pool with a capillary interface. A pool body adopts a quartz luminosity pool in 1cm, and a fixed partition plate and a three-electrode system are assembled in the pool, wherein the fixed partition plate is provided with a capillary connecting passage, and the three-electrode system comprises a working electrode plate, an auxiliary electrode and a reference ratio electrode. The invention realizes the connection of a thin-layer cavity of the electrochemical pool and a capillary electrophoresis instrument for thefirst time, and the volume of the thin-layer cavity is 50 microlitres at most; a reactant can be rapidly exhausted and electrolyzed, and a reaction product is carried out online and rapid separationdetection by the capillary electrophoresis instrument. The spectrum electrochemical pool can be used for separating and detecting an electrode product on line and can be also used for an in-situ spectrum electrochemical test. The device has simple structure, easy controlled operation, convenient disassembly, assembly and replacement of an electrode and optional working electrode material. The invention can be applied to separation, detection and reaction kinetic research on a complicated electrode reaction product in the field of electrochemistry and relevant fields.

Description

technical field [0001] The invention belongs to the fields of analytical chemistry and electrochemistry, and in particular relates to a spectroelectrochemical cell. Background technique [0002] The spectroelectrochemical method combines electrochemistry with spectroscopy. While recording electrochemical signals, the spectral information that can reflect the changes of various species and quantities is collected in situ on the surface of the electrode or in the liquid layer near it, which has greatly promoted the development of electrochemistry. The study of reaction kinetics. The implementation of this method must use a special thin-layer spectroelectrochemical cell, and the trace electrolyte in the thin-layer cavity can be quickly consumed by the electrode reaction, so that the data collection can be completed in a short time. [0003] Since complex electrode reactions usually produce a variety of products and intermediates, in addition to in situ spectral information, th...

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Problems solved by technology

[0004](1) Organic or biomolecules are usually adsorbed on the electrode surface. When the electrolysis lasts for a long time, the reaction products accumulated on the electrode surface will seriously hinder the reaction process, resulting in longer time required

In order to eliminate this obstacle, some researchers take out the electrodes at regular intervals (J Braz Chem Soc; Timbola A K, Souza C D, Giacomelli C, et al.; 2006, 17(1): 139-148.), ultrasound activated electrodes On the surface, it not only brings inconvenience to the operation, but also makes the data lose the value of kinetic analysis due to the repeated interruption of electrolysis

[0005](2) Long-term electrolysis leads to loss of active intermediate information

In recent years, the work of on-line electrochemical / HPLC separation of electrolysis products has been reported (J Am SocMass Spectr; Lohmann W, R, Gütter G, et al.; 2009, 20(1): 138-145), achieved good results in the separation and qualitative identification of electrolysis products, but the connection device is still complicated, and the depletion electrolysis is not fast enough

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