Method for detecting potassium permanganate through graphene quantum dot fluorescence quenching

Abstract

The invention discloses a method for detecting potassium permanganate through graphene quantum dot fluorescence quenching. The method is characterized in that a graphene quantum dot probe is used as a fluorescence probe and by virtue of the characteristic that the fluorescence intensity of the graphene quantum dot probe weakens with the increasing of the concentration of a potassium permanganate solution, high-sensitivity detection is performed and the change value of the fluorescence intensity of the graphene quantum dot probe forms a good linear relationship with the concentration of the potassium permanganate, with the correlation coefficient of 0.991. The method is easy and convenient to operate, rapid in detection, high in sensitivity and good in selectivity, and can perform online in-situ rapid and sensitive detection on the potassium permanganate in a mixed sample.

Description

Technical field

[0001] The invention belongs to the technical field of chemical detection, and specifically relates to a method for detecting potassium permanganate by using graphene quantum dot fluorescence quenching. Background technique

[0002] Because of its unique properties, potassium permanganate has a wide range of effects in various fields. In the production of chemicals, potassium permanganate is often widely used as an oxidant; in medicine, potassium permanganate is used as a preservative, disinfectant, deodorant and antidote, etc.; in water purification and wastewater treatment , Potassium permanganate can be used as a water treatment agent to oxidize hydrogen sulfide, phenol, iron, manganese, organic and inorganic pollutants, control odor and decolor; in gas purification, potassium permanganate can also be used to remove Sulfur, arsenic, phosphorus, silane, borane and sulfide, etc. In view of the wide application of potassium permanganate, the residual potassium p...

Examples

Embodiment 1

[0018] Prepare four standard aqueous solutions, where the concentration of the graphene quantum dots is 0.1 mg / mL, add potassium permanganate solution to the graphene quantum dot solution, so that the final concentration of potassium permanganate is 0, 1×10 sequentially -5 mol / L, 1×10 -4 mol / L and 1×10 -3 mol / L, stand for 1 min, and detect the fluorescence spectra of 370-650 nm at an excitation wavelength of 345 nm, and obtain the fluorescence spectra a, b, c and d in sequence.

[0019] From the fluorescence spectrum, it can be known that the fluorescence intensity of the graphene quantum dot probe decreases with the increase of the potassium permanganate solution concentration, and the decrease of the fluorescence intensity has a good linear relationship with the potassium permanganate solution concentration, R 2 = 0.991.

[0020] The present invention uses graphene quantum dot probes as fluorescent probes to perform highly sensitive detection of potassium permanganate. The change i...

Technical field

[0001] The invention belongs to the technical field of chemical detection, and specifically relates to a method for detecting potassium permanganate by using graphene quantum dot fluorescence quenching. Background technique

[0002] Because of its unique properties, potassium permanganate has a wide range of effects in various fields. In the production of chemicals, potassium permanganate is often widely used as an oxidant; in medicine, potassium permanganate is used as a preservative, disinfectant, deodorant and antidote, etc.; in water purification and wastewater treatment , Potassium permanganate can be used as a water treatment agent to oxidize hydrogen sulfide, phenol, iron, manganese, organic and inorganic pollutants, control odor and decolor; in gas purification, potassium permanganate can also be used to remove Sulfur, arsenic, phosphorus, silane, borane and sulfide, etc. In view of the wide application of potassium permanganate, the residual potassium p...

Examples

Embodiment 1

[0018] Prepare four standard aqueous solutions, where the concentration of the graphene quantum dots is 0.1 mg / mL, add potassium permanganate solution to the graphene quantum dot solution, so that the final concentration of potassium permanganate is 0, 1×10 sequentially -5 mol / L, 1×10 -4 mol / L and 1×10 -3 mol / L, stand for 1 min, and detect the fluorescence spectra of 370-650 nm at an excitation wavelength of 345 nm, and obtain the fluorescence spectra a, b, c and d in sequence.

[0019] From the fluorescence spectrum, it can be known that the fluorescence intensity of the graphene quantum dot probe decreases with the increase of the potassium permanganate solution concentration, and the decrease of the fluorescence intensity has a good linear relationship with the potassium permanganate solution concentration, R 2 = 0.991.

[0020] The present invention uses graphene quantum dot probes as fluorescent probes to perform highly sensitive detection of potassium permanganate. The change i...

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