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Application of kaempferol in cupric ion detection
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A technology of copper ions and kaempferol, which is applied in the field of spectral analysis and detection, can solve the problems of less research on fluorescence properties and unreported research on detection, and achieves the effects of high sensitivity, small interference and simple operation.
Inactive Publication Date: 2016-07-20
NANJING FORESTRY UNIV
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Problems solved by technology
Kaempferol has various biological activities such as anti-oxidation and anti-inflammation, but there are few studies on its fluorescence properties, and the research on its detection of metal ions as a fluorescent probe has not been reported yet.
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Embodiment 1
[0022] The application of kaempferol in the determination of copper ions specifically comprises the following steps:
[0023] (1) Accurately weigh 0.0286g kaempferol, dilute it to a 10mL volumetric flask with methanol, and make a concentration of 1×10 -2 mol L -1 Solution, take 0.1mL and dilute to 100mL volumetric flask with PBS buffer solution (pH=7.40) to make 1×10 -5 mol L -1 Solution, ready for use; accurately weigh 0.0200g Cu(AC) 2 ·H 2 Dilute O to a 10mL volumetric flask with water to make a solution containing copper ions with a concentration of 1×10 -2 mol L -1 solution, and successively diluted to 1×10 -3 , 1×10 -4 , 1×10 -5 mol L -1 solution, ready to use.
[0024] (2) Prepare several 5mL dry and clean sample tubes, add 1×10 -5 mol L -1 kaempferol solution, and copper ion solutions of different volumes and concentrations, the concentration of kaempferol is 1 × 10 -5 mol L -1 , the copper ion concentration is 0×10 -7 mol L -1 , 0.1×10 -7 mol L -1 , 0...
Embodiment 2
[0032] Containing kaempferol 1 x 10 -5 mol L -1 In the buffer solution, add the Li-containing + 、Na + 、K + , Mg 2+ , Ca 2+ 、Cr 3+ , Mn 2+ , Fe 3+ 、Co 2+ 、Ni 2+ 、Cu 2+ , Zn 2+ , Pb 2+ 、Cd 2+ , La 3+ 、Ce 3+ 、Eu 3+ 、Gd 3+ 、Dy 3+ acetate solution, where Li + 、Na + 、K + , Mg 2+ , Ca 2+ Concentration is 5 times of copper ion concentration, Cr 3+ , Mn 2+ , Fe 3+ 、Co 2+ 、Ni 2+ , Zn 2+ , Pb 2+ 、Cd 2+ , La 3+ 、Ce 3+ 、Eu 3+ 、Gd 3+ 、Dy 3+ Concentration is 2 times of copper ion concentration, and the fluorescent intensity measured under the same condition and method of embodiment 1 is as follows image 3 Shown (the unmarked metal ions in the figure are from left to right: Li + 、Na + 、K + , Mg 2+ , Ca 2+ 、Cr 3+ , Mn 2+ , Fe 3+ 、Co 2+ 、Ni 2+ , Zn 2+ , Pb 2+ 、Cd 2+ , La 3+ 、Ce 3+ 、Eu 3+ 、Gd 3+ 、Dy 3+ ), it can be seen from the figure that only the addition of copper ions will cause obvious fluorescence quenching, and other metal ions have ...
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Abstract
The invention discloses application of kaempferol in cupric ion detection, and belongs to the technical field of photoanalysis detection.According to the application, a CH3OH-PBS buffering solution with the pH value of 7.4 is used, kaempferol is prepared into a solution of 10<-5> mol / L, cupric ions with different concentrations are added, a fluorescence spectrum is adopted to measure change of fluorescence intensity, a standard curve of fluorescence intensity to cupric ion concentration is drawn, and the concentration of cupric ions in an unknown sample is obtained according to the standard curve.The application has the advantages of being simple, sensitive, accurate, environmentally friendly and high in practicability.
Description
technical field [0001] The invention belongs to the technical field of spectral analysis and detection, and in particular relates to the application of kaempferol in the determination of copper ions. Background technique [0002] Copper widely exists in nature and the human body, and is an indispensable trace element for the human body. At the same time, copper is widely used in metalsmelting, electronics, packaging and other industries closely related to human life. With the accelerated development of human society, mineral resources The phenomenon of indiscriminate mining is becoming more and more serious. In addition to the three industrial wastes, domestic garbage and electronic waste are also increasing, which eventually leads to the loss of heavy metal ions, resulting in excessive heavy metalion content in soil and water. Although copper is an essential trace element for the human body, excessive copper content can cause gastrointestinal discomfort in mild cases, ner...
Claims
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