A convenient method for detecting aluminum ions based on carbon quantum dots synthesized by flavonoid glycosides and their derivatives
A technology of carbon quantum dots and aluminum ions, which is applied in the field of portable detection of aluminum ions based on carbon quantum dots synthesized by flavonoid glycosides and its derivatives, can solve problems such as complex detection process
Active Publication Date: 2022-03-04
HUNAN AGRICULTURAL UNIV
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However, this fluorescence-based colorimetric detection technology usually needs to adjust the fluorescence intensity ratio of two fluorescent nanomaterials of different colors, which makes the detection process more complicated.
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Embodiment 1
[0032] Synthesis of blue fluorescent CDs with naringin as precursor, and based on Al 3+ Induce blue fluorescent CDs to produce new green fluorescence, use fluorescence spectroscopy and RGB method to record the changes of the two colors of fluorescence, combined with Al 3+ The relationship between the concentration and the ratio of the fluorescence of the two colors, to achieve Al 3+ highly sensitive detection.
[0033] 1. Synthetic CDs
[0034] Weigh 11.6 mg of naringin, the precursor of CDs, and dissolve it in 5 ml of absolute ethanol; after the solution is ultrasonically oscillated for 10 min, it is placed in a reaction kettle and heated at 180° C. for 2 h; the reacted solution is centrifuged (10000 rpm / min , 10 min), micromembrane filtration (pore size 0.22 μM), dialysis (pore size 1000D), and freeze-drying to obtain CDs powder. Prepare CDs with water to make a solution with a mass fraction of 0.1 mg / ml.
[0035] The ultraviolet absorption peaks, fluorescence emission p...
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Abstract
A method for conveniently detecting aluminum ions based on carbon quantum dots synthesized by flavonoid glycosides and derivatives thereof is to synthesize blue fluorescent carbon quantum dots with emission peaks at 400-480nm as precursors; Aluminum ions induce the above-mentioned blue fluorescent carbon quantum dots to produce green fluorescence with an emission peak at 490‑580nm; then, under ultraviolet light irradiation, obtain color fluorescent photos of carbon quantum dots induced by aluminum ions, and use the RGB method to analyze the photos to detect the concentration of aluminum ions. The present invention provides the synthesis of carbon quantum dots with flavonoid glycosides and derivatives thereof, and the construction of portable detection Al based on carbon quantum dots. 3+ strategy. Quantification of Al based on the change of different fluorescent colors of carbon quantum dots under ultraviolet light irradiation 3+ . In this way, as long as the smart phone and RGB analysis software can be used to analyze the fluorescence color changes of samples with different concentrations under ultraviolet light irradiation, the rapid detection of metal ions can be realized.
Description
technical field [0001] The invention mainly relates to a method for detecting aluminum ions, in particular to a method for portable detection of aluminum ions based on carbon quantum dots synthesized by flavonoid glycosides and derivatives thereof. Background technique [0002] Aluminum is the metal element with the highest content in the earth's crust, and is widely used in water treatment, aluminum containers, food additives, etc., so that aluminum ions (Al 3+ ) concentration increases. Aluminum ions slowly accumulate in the human body and may pose a hazard to human health (diseases such as Alzheimer's and Parkinson's). The World Health Organization (WHO) stipulates that the average human intake of aluminum is about 3-10mg / day. The traditional detection methods of aluminum ions mainly include atomic absorption spectrometry, atomic emission spectrometry and inductively coupled plasma mass spectrometry. Because these methods require expensive instruments, complicated samp...
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IPC IPC(8): G01N21/64
CPCG01N21/643G01N21/6456G01N2021/6417
Inventor 石星波魏伟高文丽
Owner HUNAN AGRICULTURAL UNIV