Ampere detection electrode positioned on temperature modulating column end and manufacturing method thereof
An amperometric detection and detection electrode technology, applied in the direction of material electrochemical variables, etc., can solve the problems of limiting the application of thermal electrode technology and ampere detection signal interference, and achieve the effect of simple structure, elimination of interference, and easy miniaturization.
Inactive Publication Date: 2013-04-03
FUZHOU UNIV
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Problems solved by technology
Since the amperometric detection signal of the electrochemical detector of the separation device is generally at the nA level, heating alternating current will greatly interfere with the amperometric detection signal, which limits the application of thermal electrode technology in capillary electrophoresis column end amperometric detection
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[0023] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.
[0024] Such as figure 1 As shown, the present invention provides a temperature modulation post ampere detection electrode, which is characterized in that: it is composed of a detection electrode 1 and a heating device; the detection electrode 1 is a conductor coated with insulating varnish, and the heating The device is made up of a heating coil 3 and a DC heating power supply. The heating coil 3 is folded into two parallel conductors coated with insulating varnish and wound on the detection electrode; one end of the heating coil (ie, the heating coil The terminal 6) connected to the DC power supply is connected to the DC heating power supply; the surface of the wrapped detection electrode is covered with a sleeve 4, and the sleeve 4 is fixed to the detection electrode by epoxy glue 2.
[0025] In addition, the present invention provides a ...
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The invention relates to an ampere detection electrode positioned on a temperature modulating column end and a manufacturing method thereof. The ampere detection electrode comprises a detection electrode and a heating device, wherein the detection electrode is a conductive body; the heating device comprises a heating coil and a DC heating power supply; and the heating coil is formed by winding two bent parallel lead wires on the detection electrode and is connected with the DC heating power supply. The invention can easily realize the modulation of the temperature of the electrode by controlling heating current, completely eliminate the interference of a magnetic field on ampere detection and enhance the signal to noise ratio and the detection sensitivity and achieve great high repeatability and stability; in addition, the heating way has simple structure and easy miniaturization.
Description
technical field [0001] The invention relates to a temperature modulation post ampere detection electrode capable of being used in combination with a separation technology and a manufacturing method thereof. The electrode can not only eliminate the interference of the heating current to the ampere detection signal, greatly enhance the detection sensitivity, but also has extremely high stability and reproducibility. Background technique [0002] In the field of analytical chemistry separation technology, the detector is an important part of the separation device. Currently commonly used detectors include optical detectors (such as ultraviolet-visible light detectors, differential refractive index detectors, fluorescence detectors, etc.), electrochemical detectors, mass spectrometers, nuclear magnetic resonance, flame ionization detection, photodiode arrays, etc. The electrochemical detector has the advantages of small dead volume, fast response, low cost, high sensitivity, go...
Claims
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IPC IPC(8): G01N27/30
Inventor 孙建军陈启振陈国南
Owner FUZHOU UNIV