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Method for quantitatively detecting hydroquinone by utilizing cobalt-based metal organic gel to catalyze luminescence of Luminol-hydrogen peroxide

A gel-catalyzed luminol and hydroquinone technology, applied in the field of detection, can solve the problems of low efficiency and limited development, and achieve the effect of large surface area, high sensitivity and wide linear range

Inactive Publication Date: 2019-05-17
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite these advantages, traditionally, classical chemiluminescence systems often suffer from low efficiency when converting chemical energy into light, which greatly limits their further development in analytical applications.

Method used

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  • Method for quantitatively detecting hydroquinone by utilizing cobalt-based metal organic gel to catalyze luminescence of Luminol-hydrogen peroxide
  • Method for quantitatively detecting hydroquinone by utilizing cobalt-based metal organic gel to catalyze luminescence of Luminol-hydrogen peroxide
  • Method for quantitatively detecting hydroquinone by utilizing cobalt-based metal organic gel to catalyze luminescence of Luminol-hydrogen peroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of cobalt (II)-based metal organogel, comprising the steps of: dissolving 13.4 mg 1,10-phenanthroline-2,9-dicarboxylic acid (PDA) in 250 μL dimethyl sulfoxide (DMSO) , the solution was placed in a glass vial, then, 250 μL, 0.2M cobalt chloride (CoCl 2 ) aqueous solution was added in the vial, and at room temperature, an opaque white cobalt (II)-based metal-organic gel could be observed to form within 60 seconds. It was characterized by TEM, XPS and infrared, and the results were as follows: figure 1 , figure 2 , image 3 As shown, it can be seen from each figure that the cobalt(II)-based metal organogel was successfully prepared. The Co-MOG prepared by the invention can be stored stably for several months in a sealed vial at room temperature.

[0035] Using IFFM-E flow injection chemiluminescence analyzer, its structure is as follows Figure 4 shown. Mix 1mM hydrogen peroxide solution, 1mM luminol solution and 30μM Co-MOG solution into the six...

Embodiment 2

[0048] A method for quantitatively detecting hydroquinone by catalyzing luminol-hydrogen peroxide luminescence using a cobalt-based metal organogel, comprising the following steps:

[0049] (1) Enter the IFFM-E flow injection chemiluminescence analyzer into the IFFM-E flow injection chemiluminescence analyzer to measure the chemiluminescence signal intensity respectively with aqueous hydrogen peroxide solution, hydroquinone aqueous solution of different concentrations, luminol solution, and cobalt-based metal organogel solution; The concentration of the aqueous hydrogen peroxide solution is 1000 μM; the concentration of the luminol solution is 1000 μM; the concentration of the cobalt-based metal organogel solution is 30 μM; the aqueous hydrogen peroxide solution, hydroquinone solution, luminol The injection volumes of the solution and the cobalt-based metal-organic gel solution were both 50 μL; the concentrations of the aqueous hydroquinone solutions were 10 μM, 100 μM, 200 μM,...

Embodiment 3

[0055] Interfering experiment for quantitative detection of hydroquinone by luminescence of luminol-hydrogen peroxide catalyzed by cobalt-based metal organogel

[0056] Put the mixed solution of hydrogen peroxide and interfering substances, luminol solution, Co-MOG solution, and hydroquinone aqueous solution into the IFFM-E flow injection chemiluminescence analyzer to measure the intensity of chemiluminescent signal. The interfering substances are NaCl, KCl, respectively. 、Na 2 CO 3 , NaHCO 3 , NaBr, K 3 PO 4 , the mixed solution of hydrogen peroxide and interfering substances is obtained by mixing an aqueous hydrogen peroxide solution with a concentration of 2 mM and an aqueous solution of interfering substances with a concentration of 2 mM according to a volume ratio of 1:1; the concentration of the Co-MOG solution is 30 μM; The concentration of luminol solution is 1000 μM; the concentration of hydroquinone aqueous solution is 100 μM; the pH of the 0.1M carbonate buffer ...

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Abstract

The invention discloses a method for quantitatively detecting hydroquinone by utilizing cobalt-based metal organic gel to catalyze luminiscence of Luminol-hydrogen peroxide. The method comprises the following steps: mixing the cobalt salt solution and dimethyl sulfoxide solution of 1,10-phenanthroline-2,9-dicarboxylic acid in equivalent amount to prepare the cobalt(II)-based metal organic gel, wherein the cobalt-based metal organic gel can catalyze the chemiluminiscence of the Luminol-hydrogen peroxide; taking hydroquinone as reducing agent, the hydrogen peroxide as the oxidant, thereby performing the redox reaction; mixing the hydroquinone and the hydrogen peroxide in a sampling value of an IFFM-E flow injection chemiluminiscence analyzer, and performing the reaction to reduce the hydrogen peroxide concentration, thereby reducing the chemiluminiscence strength. Along the gradually increasing of the concentration of the hydroquinone, the chemiluminiscence strength of the system is gradually reduced, and the quantitative detection of the hydroquinone can be realized by utilizing the gradual linear relation of the concentration of the hydroquinone and the chemiluminiscence strength.

Description

technical field [0001] The invention belongs to the technical field of detection technology, and in particular relates to a method for quantitatively detecting hydroquinone by using cobalt-based metal organogel to catalyze luminol-hydrogen peroxide luminescence. Background technique [0002] Metal-organic gels (MOGs) are a new type of metal-organic hybrid materials. MOGs not only respond sensitively to environmental stimuli, such as changes in pH, sonication, light, and temperature, but also possess high surface area, porous structure, and high thermal stability. Owing to their unique properties, MOGs continue to receive great attention in various applications, including sensing, adsorption, light-emitting diodes, drug delivery, and environmental pollution remediation. Especially in the field of catalysis, transition metal-containing MOG as a catalyst has shown extremely important and outstanding performance in the field of catalysis due to its high-efficiency, low-cost, ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76
Inventor 李永新余嘉琪
Owner ANHUI NORMAL UNIV
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