A method for detecting and removing fluoride ions

A detection method, fluorine ion technology, applied in chemical instruments and methods, measuring devices, nanotechnology for materials and surface science, etc., can solve the problem of low selectivity and sensitivity of metal ions, and unsatisfactory dispersion , probe biological toxicity and other issues, to achieve excellent superparamagnetic properties, good cell permeability, and low cytotoxicity
CN109297943BActive Publication Date: 2021-12-24SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2021-12-24

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Abstract

The invention discloses a detection method and a removal method of fluoride ions. In the present invention, the mesoporous silica layer immobilized with carbon quantum dots (SiCDs) is used as an autofluorescent marker, and at the same time, fluorophore pure carbon dots (NCDs) and F ion acceptor nickel ions (Ni 2+ ) chelates are quenched fluorescent probes, forming a dual-fluorophore composite superparamagnetic fluorescent probe, using fluoride ions to compete with pure carbon dots to bind Ni in the fluorescent probe 2+ , thereby changing the fluorescence intensity to realize fast, efficient, specific and visual detection of fluoride ions, the detection limit is 65 nM, and the linear range is 1-25 μM; the present invention also establishes a simple, fast, specific and efficient fluoride ion The ion removal method, the removal efficiency of fluoride ion in tap water is as high as 96%, and the fluorescent probe can be recycled repeatedly, and it is expected to be widely used in the fields of biological and medical monitoring and detection.
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Description

technical field

[0001] The invention belongs to the technical field of chemical analysis and detection. More specifically, it relates to a method for detecting and removing fluoride ions. Background technique

[0002] Fluoride ion (F - ) are widely distributed in environmental systems and biological processes. Adequate intake of fluoride ions is beneficial to the health of teeth and bones, but too much or too little intake of fluoride ions will have adverse effects on the human body and may cause systemic diseases, such as Fluorosis and osteoporosis etc. Therefore, it is extremely important for human beings to accurately detect and control the concentration of fluoride ions in water resources. Traditional fluoride ion detection methods include fluoride ion selective electrode, ion chromatography, etc., but there are disadvantages such as high cost, complicated operation, and not easy to carry. In contrast, fluorescent chemical sensors have the advantages of convenience, ...

Claims

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