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A method for rapid detection of lead ions in sample liquid

A lead ion, sample solution technology, applied in the field of rapid detection of lead ions in sample solution, can solve the problems of perovskite analysis and application limitations

Active Publication Date: 2021-04-20
XIAMEN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, perovskite is easily decomposed by light, oxygen in the air, water, etc., which limits the application of perovskite to a certain extent.

Method used

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  • A method for rapid detection of lead ions in sample liquid
  • A method for rapid detection of lead ions in sample liquid
  • A method for rapid detection of lead ions in sample liquid

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Embodiment 1

[0030] A kind of method for rapid detection of lead ions in the sample liquid of the present embodiment comprises the following steps:

[0031] 1) Take an aluminum oxide (AAO) film with a mesopore size of about 20 nm, place the mesoporous aluminum oxide (AAO) film in 1 to 5 wt % of a silane coupling agent (3-mercaptopropyltriethyl) containing a mercapto group Oxysilane) in ethyl acetate solution, sealed at room temperature for 24h. Then, the mercapto-modified mesoporous alumina (AAO) membrane is washed, dried at 90° C. to 100° C. to obtain the mercapto-modified mesoporous alumina (AAO) membrane, and sealed and dried.

[0032] 2) Use the modified mesoporous alumina (AAO) membrane to enrich the lead ions in the sample to be tested: first transfer 10-50 mL of the sample to be tested into a 50-100 mL beaker that has been soaked and cleaned by acid; Under stirring state, use mesoporous alumina (AAO) membrane to extract lead ions in water for 15-25 minutes; the extraction temperatu...

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Abstract

The invention discloses a method for rapidly detecting lead ions in a sample liquid. The surface of a mesoporous aluminum oxide (AAO) film is modified with mercapto groups by using 3-mercaptopropyltriethoxysilane, and the modified mesoporous The porous alumina (AAO) membrane is used to enrich the lead ions in the sample to be tested, and methylamine bromide solution is added dropwise on the enriched mesoporous alumina (AAO) membrane to form methylamine lead bromide perovskite nanocrystals. The fluorescence intensity of the generated methylamine-lead-bromide perovskite is detected, and then the content of lead ions in the liquid to be tested is measured. The present invention makes full use of the in-situ growth of MAPbBr 3 Perovskite low fluorescence background, good specificity, high quantum yield, and mesoporous alumina (AAO) film for MAPbBr 3 Perovskite has the characteristics of confinement, combined with the advantages of high sensitivity and convenient detection process of fluorescence spectroscopy, it provides a simple, high sensitivity, high stability, good selectivity, good reproducibility, fast lead ion Analytical method.

Description

technical field [0001] The invention relates to a method for rapidly detecting lead ions in sample liquid. Background technique [0002] Lead is a common heavy metal ion in water. Because of its accumulation, long-term drinking will affect people's nervous, endocrine, digestive and blood circulation systems, and directly endanger human health. my country has made clear regulations on the limit of lead ions in water in the "Hygienic Standards for Drinking Water" GB 5749-2006. Traditional methods for determining lead ions in water include GB 7475-87 atomic absorption spectrophotometry, GB 7470-87 dithizone spectrophotometry, and GB / T 13896-92 oscillographic polarography. Time-consuming, dithizone spectrophotometry is complicated to operate, and electrochemical oscillographic polarography is susceptible to interference from the complex matrix of the sample. Therefore, it is necessary to develop a fast, sensitive, high-selectivity, and simple analysis method. [0003] Organic-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 王翊如王舒雅李飞明陈曦
Owner XIAMEN UNIV
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