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A kind of carbon paste electrode for detecting hydroquinone and preparation and detection method thereof

A carbon paste electrode, hydroquinone technology, applied in the field of analytical chemical detection, can solve the problems of narrow linear range, minimum detection limit and high, and achieve the effects of good reproducibility, simple process and high sensitivity

Active Publication Date: 2020-08-18
NINGDE NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing detection methods include high performance liquid chromatography, synchronous fluorescence spectroscopy, spectrophotometry, gas chromatography and electrochemical methods, but there are problems of narrow linear range and high minimum detection limit

Method used

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  • A kind of carbon paste electrode for detecting hydroquinone and preparation and detection method thereof
  • A kind of carbon paste electrode for detecting hydroquinone and preparation and detection method thereof
  • A kind of carbon paste electrode for detecting hydroquinone and preparation and detection method thereof

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preparation example Construction

[0038] An embodiment of the present invention provides a method for preparing a carbon paste electrode for detecting hydroquinone, comprising the following steps:

[0039] S1: Mixing graphite powder and binder to carbon paste;

[0040] S2: Take an electrode tube, the electrode tube has a first end and a second end opposite to each other, the carbon paste is pressed into the electrode tube from the first end, and the electrode wire is inserted from the second end to prepare a carbon paste electrode matrix;

[0041] S3: injecting a graphene oxide solution on the surface of the second end, drying, and forming a graphene oxide layer on the surface of the carbon paste electrode substrate.

[0042] Further, in a preferred embodiment of the present invention, in the graphene oxide solution, the concentration of graphene oxide is 0.001-0.002 g / mL. At this concentration, it is convenient for graphene oxide to form a modified layer on the surface of the electrode substrate, which has s...

Embodiment 1

[0058] A carbon paste electrode provided in this embodiment is prepared according to the following preparation method:

[0059] S1, prepare the graphite powder and simethicone oil according to the mass ratio of 3:1, drop the simethicone oil in the middle of the graphite as much as possible, grind for 10 minutes, until the mixture is uniform, the surface is bright and the carbon paste is obtained, and then put into the weighing bottle Store away from light.

[0060] S2, cut off the used refill tube about 5cm long, wash it with distilled water and dry it with lens tissue. Squeeze the mixed carbon paste into one end of the pen core tube by pressing, fill it to about 3 / 4, then connect the copper wire, and finally polish it on the weighing paper to obtain the carbon paste electrode base (CPE ). With a scan rate of 0.1V / s, use cyclic voltammetry in the voltage range of -1.0 to 1.0V at K 3 [Fe(CN) 6 ] The solution was scanned for 5 circles and activated for use.

[0061] S3, tak...

Embodiment 2

[0063] A carbon paste electrode provided in this embodiment is prepared according to the following preparation method:

[0064] S1, prepare the graphite powder and simethicone oil according to the mass ratio of 2:1, drop the simethicone oil in the middle of the graphite as much as possible, grind for 15 minutes, until the mixture is uniform, the surface is bright and the carbon paste is obtained, and then put into the weighing bottle Store away from light.

[0065] S2, cut off the used refill tube about 5cm long, wash it with distilled water and dry it with lens tissue. Squeeze the mixed carbon paste into one end of the pen core tube by pressing, fill it to about 3 / 4, then connect the copper wire, and finally polish it on the weighing paper to obtain the carbon paste electrode base (CPE ). With a scan rate of 0.1V / s, use cyclic voltammetry in the voltage range of -1.0 to 1.0V at K 3 [Fe(CN) 6 ] The solution was scanned for 5 circles and activated for use.

[0066] S3, tak...

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Abstract

Relating to the field of analytical chemistry detection, the invention provides a carbon paste electrode for detection of hydroquinone, and a preparation and detection method thereof. The carbon paste electrode for detection of hydroquinone comprises a carbon paste, an electrode tube, an electrode lead wire, and a graphene oxide coating. The electrode tube has a first end and a second end opposite in positions, the carbon paste is pressed into the electrode tube from the first end of the electrode tube, the electrode lead wire contacts the carbon paste, and is led out from the second end of the electrode tube, and the graphene oxide layer is formed on the surface of the first end. The carbon paste electrode modifies graphene oxide to a carbon paste electrode substrate, and graphene oxide is an excellent modifier and has good electrocatalytic response to hydroquinone. Also the carbon paste electrode has the advantages of simple making, long service cycle, good stability, high sensitivity, low cost, easy preparation and excellent reproducibility, etc., and can be used for determination of hydroquinone in water samples. In addition, the invention also relates to a preparation method of the carbon paste electrode and a detection method of hydroquinone.

Description

technical field [0001] The invention relates to the field of analytical chemical detection, and in particular to a carbon paste electrode for detecting hydroquinone and a preparation and detection method thereof. Background technique [0002] Hydroquinone (HQ), also known as hydroquinone, belongs to phenolic compounds, is a widely used chemical raw material, and is also a class of organic pollutants that can cause great harm to the human body and the environment. At present, hydroquinone is widely used in daily life, and can be used to prepare black and white developer, rubber anti-aging agent, stabilizer, and can also be used as food antioxidant. However, hydroquinone is difficult to degrade, causing serious pollution to the environment, and is very toxic. Adults will have headache, dizziness, nausea, vomiting and other poisoning symptoms if they take 1g by mistake. It is also carcinogenic and mutagenic. Considering its application and pollution prevention, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/307G01N27/308G01N27/48
Inventor 庄凰龙吴艳玲颜桂炀游东宏陈峰
Owner NINGDE NORMAL UNIV
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