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A method and test paper for quantitatively detecting the concentration of perchlorate ion based on aggregation-induced luminescence

A technology of aggregation-induced luminescence and perchlorate, which is applied in the field of physical and chemical analysis of chemical substances, can solve the problems of insufficient quickness and convenience, reduced sensitivity, labor and time-consuming, etc., and achieves low cost, high sensitivity and good selectivity.

Active Publication Date: 2021-05-28
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used methods for detecting perchlorate ions mainly include ion chromatography and ion chromatography-mass spectrometry, etc. These detection methods are laborious and time-consuming.
The traditional fluorescence technology detects anions, usually based on fluorescence "off" rather than "on". Heavy metal ions compete with fluorescence quenching to reduce sensitivity, which has great limitations in practical applications and the construction of rapid test strips
[0003] The invention patent with the patent number ZL2014100403869 discloses a kit for detecting perchlorate ions in food and its determination method. In this invention, the purification method of solid phase extraction is used to separate the perchlorate ions in food, and then combined with mass spectrometry Calculating the concentration of perchlorate ions, although the accuracy is high, but the cost is high, more equipment needs to be invested, and the use is not fast and convenient enough

Method used

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  • A method and test paper for quantitatively detecting the concentration of perchlorate ion based on aggregation-induced luminescence
  • A method and test paper for quantitatively detecting the concentration of perchlorate ion based on aggregation-induced luminescence
  • A method and test paper for quantitatively detecting the concentration of perchlorate ion based on aggregation-induced luminescence

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Embodiment 1

[0050] This embodiment discloses a method for quantitatively detecting perchlorate ion concentration based on aggregation-induced luminescence, comprising the following steps:

[0051] Step 1, preparing a tetraphenylphosphonium chloride test solution with a concentration of 0.1M;

[0052] First, tetraphenylphosphonium chloride was added to HEPES buffer solution with a pH value of 7.4 to prepare tetraphenylphosphonium chloride test solution of 0.1M tetraphenylphosphonium chloride;

[0053] Step 2, obtaining a standard curve obtained through linear fitting between phosphorescence intensity and perchlorate ion concentration;

[0054] A variety of perchlorate ions with a concentration distribution in the range of 0.0 to 100.0 μM are added to the tetraphenylphosphonium chloride test solution, and precipitated microcrystalline tetraphenylpotassium perchlorate is generated in the test solution;

[0055] Use a xenon arc lamp to record the phosphorescence emission spectrum of the test...

Embodiment 2

[0061] This embodiment discloses a method for quantitative detection of perchlorate ion concentration in a self-fluorescence composite matrix based on time-gated detection,

[0062] Include the following steps:

[0063] Step 1, preparing a test solution of autofluorescent complex matrix tetraphenylphosphonium chloride with a concentration of 0.1M;

[0064] Firstly, tetraphenylphosphonium chloride and human serum were added into the HEPES buffer solution with a pH value of 7.4 to prepare a test solution of tetraphenylphosphonium chloride with a concentration of 0.1M having an autofluorescence complex matrix;

[0065] Step 2, obtaining a standard curve obtained through linear fitting between the phosphorescence intensity and the concentration of perchlorate ions in the complex matrix;

[0066] A variety of perchlorate ions with a concentration distribution in the range of 0.0 to 120.0 μM are added to the self-fluorescent complex matrix tetraphenylphosphonium chloride test solut...

Embodiment 3

[0075] This embodiment discloses a solid matrix room temperature phosphorescent perchlorate ion detection test paper. The test paper strip made of filter paper is soaked in a solution with a concentration of 0.2M tetraphenylphosphonium chloride for more than one minute, and dried at room temperature to obtain the test paper. note.

[0076] Fifty test paper strips made of filter paper were soaked in 0.2M TPPCl solution for 1 minute, and then dried at room temperature to obtain test paper strips. A series of different amounts of perchlorate ions in the range of 0.0-10.0 μg were dropped on the test paper respectively, and the luminescence spectrum of the obtained test paper was recorded under the excitation light of 370nm, and photographed under the ultraviolet light after drying. Selectivity tests were carried out according to the above procedure, adding different anions, including NO 3 – ,PO 4 3– ,CO 3 2- ,CH 3 CO 2 – , SO 4 2– , SO 3 2– ,S 2 o 3 2– ,S 2– ,ClO ...

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Abstract

The invention discloses a method for quantitatively detecting the concentration of perchlorate ions based on aggregation-induced luminescence, comprising step 1, preparing a tetraphenylphosphonium chloride test solution with a concentration of 0.1M; step 2, obtaining phosphorescence intensity and perchlorate ion concentration The standard curve that obtains through linear fitting between; Step 3, measure the concentration of perchlorate ion solution to be measured and add the tetraphenylphosphonium chloride test solution that concentration is 100.0 μ M and produce the phosphorescence luminescence intensity after the precipitated microcrystal, will obtain The phosphorescence luminescence intensity corresponds to the standard curve obtained in step 2 to obtain the concentration of the perchlorate ion solution to be measured; the invention also discloses a detection test paper for detecting perchlorate ions; the invention utilizes the ultra-high quantum production of tetraphenyl potassium perchlorate Rapid, sensitive and quantitative detection of perchlorate ion concentration in aqueous solutions and solid matrices.

Description

technical field [0001] The invention relates to the field of physical and chemical analysis of chemical substances, in particular to a method for quantitatively detecting the concentration of perchlorate ions based on aggregation-induced luminescence and a detection test paper. Background technique [0002] Perchlorate is an important pollutant from the industrial and commercial application of perchlorate, and its pollution to water quality has also received widespread attention. It is a toxic pollutant that is easily soluble in water, easy to migrate, and persistent. It is very easy to pollute groundwater and other drinking water sources. , especially the normal growth and development of brain tissue, thus endangering human health. At the same time, as a harmful pollutant, perchlorate ions are often enriched in plants, resulting in slow growth and death of plants. Therefore, the detection of perchlorate ions in environmental and biological samples is particularly importan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N21/77G01N21/82
CPCG01N21/64G01N21/77G01N21/82G01N2021/7759
Inventor 丰慧钱兆生陈桂林
Owner ZHEJIANG NORMAL UNIVERSITY
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