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Device and method for detecting ascorbic acid through dual-wavelength

An ascorbic acid and dual-wavelength technology, applied in the field of electrochemistry, can solve the problems of selectivity and accuracy to be improved, and achieve good electrochemical performance, high oxygen evolution overpotential, and improve accuracy and reliability.

Inactive Publication Date: 2016-01-20
SHANDONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that under the excitation of a light source in a certain wavelength range, only a single electrode reaction occurs on the surface of the photosensitive electrode of the photoelectrochemical detector, and only a single anode photocurrent can be used for detection. The disadvantage is that the selectivity and accuracy of detection need to be improved

Method used

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  • Device and method for detecting ascorbic acid through dual-wavelength
  • Device and method for detecting ascorbic acid through dual-wavelength
  • Device and method for detecting ascorbic acid through dual-wavelength

Examples

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Effect test

Embodiment 1

[0051] Such as figure 1 Shown, a kind of dual-wavelength photoelectrochemical detection device and system include (1): dual-wavelength light source; (2): light valve; (3): light window; (4): photosensitive electrode; (5): reference Electrode; (6): platinum electrode; (7): dark box; (8): LK2005 electrochemical workstation; (9): computer.

[0052] (1) The dual-wavelength light source excites the photosensitive electrode. The light source is located outside the dark box. During the experiment, the light source is in the power-on state. By controlling the opening or closing of the light valve, the photosensitive electrode is controlled under light or dark conditions.

[0053] The material of the light window (3) on the side receiving the light of the detection pool is optical quartz glass, because it can pass through the light of ultraviolet wavelength.

[0054] The photosensitive electrode (4), reference electrode (5) and platinum electrode (6) are placed in the detection cell, ...

Embodiment 2

[0069] The difference from Example 1 is that the excitation light source of the present invention has wavelengths of 240 nm and 400 nm. Under the above wavelength, it can realize the detection of the concentration of ascorbic acid and uric acid.

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Abstract

The invention provides a device and method for detecting ascorbic acid through dual-wavelength. The device comprises a dual-wavelength light source, a detection cell, a light valve, a three-electrode system, a camera bellows and an electrochemical workstation. A photosensitive electrode, a reference electrode, a platinum electrode and a to-be-tested solution are placed in the detection cell, and the purpose of detecting ascorbic acid is achieved by detecting light current in a loop under the dual-wavelength condition. According to the device and method for detecting ascorbic acid through dual-wavelength, on the basis that existing operating conditions are not changed, 254 mm and 365 mm light sources are used as exciting light respectively, the ascorbic acid is detected through two different electrode reactions, and detection accuracy and reliability are improved.

Description

technical field [0001] The invention relates to electrochemical technology, in particular to a dual-wavelength detection device and method for ascorbic acid. Background technique [0002] Ascorbic acid is also known as vitamin C. Ascorbic acid is a white crystal in appearance, a water-soluble vitamin that exists in large quantities in fresh fruits and vegetables. In clinical medicine, it is mainly used to prevent and treat scurvy, and also to assist in the treatment of dental caries, gingival abscess, anemia, growth retardation and other diseases. Ascorbic acid is one of the essential vitamins for the human body to maintain normal physiological functions, and humans cannot rely on the liver to synthesize it like most other mammals, and can only be ingested through food or drugs. Therefore, more and more scientists have invested in the efficient, accurate and convenient detection research of ascorbic acid, and developed detection methods such as spectrophotometry, electroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 申大忠孔令强王旭祥康琪辛晓东徐薇婷
Owner SHANDONG NORMAL UNIV
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