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Analysis method for using magnesium-aluminium carbonate hydrotalcite to catalyze luminol-hydrogen peroxide chemiluminescence

A technology of hydrogen peroxide chemistry and analysis method is applied in the analysis field of catalyzing luminol-hydrogen peroxide chemiluminescence with magnesium-aluminum carbonate hydrotalcite, and can solve problems such as water pollution, pollution, environmental or ecosystem harm, and the like, Achieve the effect of easy preparation, high detection sensitivity and low cost

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the existing catalysts have the following disadvantages: the price of enzymes such as horseradish peroxidase and glucose oxidase is mostly more than one hundred yuan or thousands of yuan per gram, and the pretreatment process using these catalysts is relatively complicated and cumbersome.
Heavy metals such as Cu 2+ ,Co 2+ etc. will cause harm to the environment or ecological system, and under the same conditions, many metal ions can catalyze or inhibit the chemiluminescent reaction of the same system, which makes it difficult to selectively measure a certain ion; surfactant SDS, SDBS , CTAB is also polluted, when the water concentration is 4-10g / mL, it will pollute the water

Method used

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  • Analysis method for using magnesium-aluminium carbonate hydrotalcite to catalyze luminol-hydrogen peroxide chemiluminescence
  • Analysis method for using magnesium-aluminium carbonate hydrotalcite to catalyze luminol-hydrogen peroxide chemiluminescence
  • Analysis method for using magnesium-aluminium carbonate hydrotalcite to catalyze luminol-hydrogen peroxide chemiluminescence

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Determination of hydrogen peroxide in tap water using magnesium aluminum carbonate hydrotalcite as a chemiluminescence catalyst.

[0020] A Prepare the solution to be tested and the running solution

[0021] The preparation method of the hydrotalcite of magnesium aluminum carbonate intercalation is: take by weighing 11.5385g Mg (NO 3 ) 2 ·6H 2 O and 5.6272gAl(NO 3 ) 3 9H 2 O, add 60mL ultrapure water to prepare salt solution; weigh 0.7949g Na 2 CO 3 With 4.8g NaOH, add 60mL ultrapure water to make lye. The above two solutions were dropped into the four-neck flask and stirred, the pH was controlled at 9.8-10.0, and the temperature was room temperature. After the dropwise addition, the four-necked bottle was placed in a water bath at 60°C for 24 hours for crystallization. The product was centrifuged and washed three times, dried in a vacuum oven at 70°C for 24 hours, and ground to powder. It is configured as 0.01-0.015g / mL magnesium aluminum carbonate...

Embodiment 2

[0031] Collect rainwater and measure it as soon as possible, and use the standard addition method to determine H in rainwater 2 o 2 concentration. Prepare the concentration of 2×10 respectively with rainwater -6 M, 4×10 -6 M, 6×10 -6 M, 8×10 -6 M, 10×10 -6 M and other hydrogen peroxide. Put into bottle No. 1.

[0032] Other steps are with embodiment 1. Measured H in rainwater 2 o 2 The concentration is 5.93×10 -6 M. The recovery rate was 102%.

[0033] Comparative Test:

[0034] With concentration being 0.375M magnesium nitrate solution, 0.125M aluminum nitrate solution to replace magnesium aluminum carbonate hydrotalcite in embodiment 1 respectively as catalyst, carry out the same operation result see image 3 . Depend on image 3 It can be seen that the chemiluminescence intensity of its magnesium nitrate solution and aluminum nitrate solution is far lower than the signal of magnesium aluminum carbonate hydrotalcite, indicating that the catalytic luminol-hydr...

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Abstract

The invention provides an analysis method for using magnesium-aluminium carbonate hydrotalcite to catalyze luminol-hydrogen peroxide chemiluminescence. The luminol-hydrogen peroxide chemiluminescence analysis method is automatically carried out by a BPCL ultra-weak chemiluminescence analyzer, wherein solution to be tested, testing luminous solution and ultrapure water are respectively loaded in three storage bottles, a luminol-hydrogen peroxide chemiluminescence reaction system comprises a sensitizing catalyst solution injection port, a flow cell, a photomultiplier and a BPCL tester, and the analysis method is characterized in that the magnesium-aluminium carbonate hydrotalcite is adopted as sensitizing catalyst. Compared with carbonate catalyst in catalyzing the luminol-hydrogen peroxide chemiluminescence system, the magnesium-aluminium carbonate hydrotalcite remarkably enhances the effect of catalyzing luminol-hydrogen peroxide chemiluminescence, and moreover, the magnesium-aluminium carbonate hydrotalcite has the advantages of low cost, environment-friendliness and the like, is easy to synthesize, and has a broad application prospect in environment, bioanalysis and the like.

Description

[0001] Field: [0002] The invention relates to the application of magnesium aluminum carbonate hydrotalcite, in particular to the use of magnesium aluminum carbonate hydrotalcite in chemiluminescence analysis technology. Background technique: [0003] Chemiluminescence (Chemiluminescence, CL) refers to the phenomenon of light radiation produced when molecules that absorb chemical reaction energy return from the excited state to the ground state. It is important to study the physical and chemical processes related to it, such as kinetics, thermodynamics, and light emission properties. Value. Chemiluminescence analysis is a micro and trace analysis method that determines the content of corresponding components in the reaction based on the intensity of chemiluminescence or the total amount of chemiluminescence at a certain moment. It has high sensitivity, wide linear range, simple equipment, easy operation, and easy Realize the characteristics of automation and fast analysis. ...

Claims

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Application Information

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IPC IPC(8): G01N21/76
Inventor 王志华刘芳吕超
Owner BEIJING UNIV OF CHEM TECH
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