Chemiluminescence enhancer and its preparation method and application in detecting nitrite

A chemiluminescence and nitrite technology, which is applied in the field of chemiluminescence enhancers and its preparation, can solve the problems of large detection errors, complicated procedures, and restrictions on wide application, and achieve the best detection effect

Active Publication Date: 2021-05-18
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional detection error is large and the procedure is relatively complicated
Although the electrochemical method has fast response and simple operation, the equipment required for detection is relatively expensive, which limits its wide application

Method used

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  • Chemiluminescence enhancer and its preparation method and application in detecting nitrite
  • Chemiluminescence enhancer and its preparation method and application in detecting nitrite
  • Chemiluminescence enhancer and its preparation method and application in detecting nitrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The inventors of the present application have found through a large number of experiments that fluoride nanoparticles doped with rare earth elements are prone to generate active oxygen species, which can enhance the NaNO 2 -H 2 o 2 The chemiluminescence of the system and the degree of enhancement is the same as that of NO 2 - The concentration is linearly related. Moreover, the inventors of the present application have found through a large number of experiments that fluorides doped with rare earth elements have good thermal stability, high ionicity, low refractive index, wide band gap and low phonon energy, therefore, doped rare earth elements The fluoride is suitable as a material for chemiluminescence and can be used for NO 2 - detection.

[0052] Based on the above findings, an embodiment of the present application provides a nanomaterial, the nanomaterial includes fluoride and a doped rare earth element, the fluoride may be rare earth fluoride, and the rare e...

Embodiment 2

[0055] The embodiment of the present application provides the preparation method of the nanomaterial in the embodiment 1, specifically preparing rare earth element-doped fluoride nanoparticles by hydrothermal method. Specifically include the following steps.

[0056] 2.1. Prepare rare earth salt solution and NaF solution respectively.

[0057] 2.2. Mix rare earth salt solution, NaF solution, absolute ethanol and oleic acid in a reaction kettle, stir for 30 minutes, and heat at 200°C for 8 hours.

[0058] 2.3. After the reaction, suck out the supernatant in the reaction kettle, centrifuge the remaining suspension at 6000rpm for 5min, remove the supernatant, add hydrochloric acid to the remaining solid, and disperse it by ultrasonic.

[0059] 2.4, add absolute ethanol, then centrifuge at 6000rpm for 5min, remove the supernatant, and add water to dissolve the remaining solid for later use.

[0060] Next, the preparation process of the nanomaterials provided in the present appli...

Embodiment 3

[0062] In this example, the positive trivalent state of Ce(III) is doped into LaF 3 Nanoparticles, Synthetic Chemiluminescence Enhancers (Ce NPs). details as follows.

[0063] Prepare 0.2mol·L respectively -1 LaCl 3 Aqueous solution, 0.05mol·L -1 CeCl 3 Aqueous solution, 1.0mol·L -1 NaF aqueous solution. Take 2.25mL LaCl 3 Aqueous solution, 1.00mL CeCl 3 Aqueous solution, 2mL NaF aqueous solution, 20mL ethanol and 10mL oleic acid were mixed in a reaction kettle, stirred for 30min, and heated at 200°C for 8h. After the reaction, stand still until the temperature drops to room temperature, suck out the supernatant in the reaction kettle, centrifuge the remaining suspension at 6000rpm for 5min, remove the supernatant, add 4-5mL of 2mol L to the remaining precipitate -1 Hydrochloric acid, ultrasonic dispersion (for example, ultrasonic power is 300W, ultrasonic time is 30 minutes). Then, add 4-5 mL of absolute ethanol, centrifuge at 6000 rpm for 5 min, remove the supernat...

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Abstract

The embodiment of this specification relates to the technical field of nitrite detection, in particular to a chemiluminescent enhancer, its preparation method and its use in the detection of nitrite. Wherein, the chemiluminescence enhancer includes nano-sized rare earth fluoride, the rare earth fluoride is doped with cerium element, and the valence state of the cerium element is positive trivalent; wherein, the cerium element and the rare earth fluoride in the rare earth fluoride The rare earth elements are different elements, and the molar ratio of the cerium element to the rare earth element in the rare earth fluoride is (1:10)-(3:10). The chemiluminescence enhancer can enhance the chemiluminescence in the process of nitrite detection, thereby improving the detection effect of nitrite by chemiluminescence.

Description

technical field [0001] The embodiment of this specification relates to the technical field of nitrite detection, in particular to a chemiluminescent enhancer, its preparation method and its use in the detection of nitrite. Background technique [0002] Nitrite is widely distributed in vegetables, drinking water, food, and even physiological systems. Under certain conditions, it can form nitrosamines, which are harmful to the human body. The chemical properties of nitrite are very unstable, therefore, the rapid detection of nitrite is very important. [0003] The most common detection methods are chromatography, spectrophotometry, electrochemical methods, and chemiluminescence. The traditional detection error is larger and the procedure is more complicated. Although the electrochemical method has fast response and simple operation, the equipment required for detection is relatively expensive, which limits its wide application. [0004] As a powerful analytical technique, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/76G01N21/64C09K11/85
CPCC09K11/7772G01N21/6402G01N21/76
Inventor 吴静王嫣然黄春霞
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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