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Preparation method of a photoelectrochemical sensor for detecting glutathione

A photoelectrochemical and glutathione technology, applied in the direction of material electrochemical variables, etc., to achieve high sensitivity and photoelectrochemical signal enhancement

Inactive Publication Date: 2020-09-01
混隽雅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have their own advantages and can meet the detection requirements of glutathione to varying degrees, but each of these methods has its disadvantages

Method used

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  • Preparation method of a photoelectrochemical sensor for detecting glutathione
  • Preparation method of a photoelectrochemical sensor for detecting glutathione
  • Preparation method of a photoelectrochemical sensor for detecting glutathione

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation and stripping of tin selenide

[0027] a. Preparation: Take 0.6769g tin dichloride (SnCl 2 ﹒ 2H 2 O) and 0.2368g solid tin powder (Se) in a beaker, measure 48mL ethylene glycol with a measuring cylinder and pour it into the beaker, then measure 12mL ethylenediamine and pour it into the beaker, and stir for 30 minutes, then pour it into In the reaction kettle, put it in an oven at 160°C, and take it out after 12 hours to obtain tin selenide (SnSe);

[0028] b. Stripping: Mix the prepared SnSe solution with N,N-dimethylformamide (DMF) according to the volume ratio of 1:1 and place it in a centrifuge tube for ultrasonication for 2 hours; take out the ultrasonicated solution and centrifuge , and washed 3 times with absolute ethanol, then added deionized water to disperse to form a 2mg / mL solution for later use.

[0029] (2) Exfoliation of hydrotalcite-like

[0030] a. Preparation. According to the molar ratio of Mg-Al is 3:1 will AlCl 3 ·6H 2 O and M...

Embodiment 2

[0037] Example 2 Potential optimization

[0038] The prepared photochemical sensor will change its own electron transfer system due to the difference in electrode potential, which will have a certain impact on the measurement of photoelectrochemical signals. The photoelectrochemical signals were measured at different working potentials of -0.1V, 0.0V, 0.1V and 0.2V, respectively. The experimental results show that with the increase of the electrode potential, the photoelectrochemical signal value tends to increase. But as the potential increases, the peak shape is poor when the potential is 0.2V. When measuring at an electrode potential of 0.1V, the photoelectrochemical signal value is relatively large and the peak shape is relatively good for reading, so the final electrode potential is 0.1V.

Embodiment 3

[0039] Example 3 pH optimization

[0040] The electrodes were placed in 10 -6 In the glutathione solution of M, the photoelectrochemical signal was measured under the conditions of pH 6.0, 6.5, 7.0, 7.5, and 8.0. The experimental results show that under the condition of potential 0.1V, the photoelectrochemical signal response measured under different pH conditions. It can be seen that the signal increases when the pH is 6.0-7.0, reaches the maximum value when the pH is around 7.0, and shows a downward trend in the range of 7.0-8.0. Therefore, the pH of the detection medium is chosen to be 7.0.

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Abstract

The invention belongs to the field of analytical chemistry and a photoinduced electrochemical sensor, and concretely relates to a preparation method of a photoinduced electrochemical sensor for detecting glutathione and an application thereof. The invention also relates to a method for determining glutathione by using the photoinduced electrochemical sensor. According to the invention, a nano SnSeand nano HTLC composite material is used for modifying a carbon paste electrode, the photoinduced electrochemical sensor is constructed, when glutathione exists, a photoinduced electrochemical signalof the sensor is changed, and determination on glutathione is realized. The method has the advantages of simpleness and high sensitivity.

Description

technical field [0001] The invention belongs to the field of analytical chemistry and photoelectrochemical sensors, in particular to a preparation method and application of a photoelectrochemical sensor for detecting glutathione. In addition, the present invention also relates to a method for measuring glutathione by using the photoelectrochemical sensor. Background technique [0002] Photoelectrochemistry (PEC) is a photoelectrochemical active substance that is excited by light, electrons are excited by light, electrons transition from the ground state to the excited state, and escape from the surface of the material, resulting in charge transfer on the surface of the material. Glutathione (GSH) is a tripeptide that combines glutamic acid, cysteine ​​and glycine and contains a sulfhydryl group. It has antioxidant and integrated detoxification effects. Glutathione widely exists in animals and plants. It is very high in baker's yeast, wheat germ and animal liver. Glutathio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 混隽雅
Owner 混隽雅
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