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Preparation method of IL, magnetic graphene oxide nano-material and application of magnetic graphene oxide nano-material

A nanomaterial and graphene technology, applied in the field of plant growth regulators, can solve the problems of low accuracy, sensitivity and precision of analytical methods, and the inability to achieve selective adsorption of various plant growth regulators.

Inactive Publication Date: 2018-11-13
INSPECTION & QUARANTINE TECH CENT OF CHONGQING ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

[0004] The adsorbents used in conventional solid-phase extraction or dispersive solid-phase extraction will also adsorb more impurities while adsorbing the target substance, which cannot achieve selective adsorption of various plant growth regulators, resulting in the accuracy, sensitivity and precision of the analysis method. low degree

Method used

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  • Preparation method of IL, magnetic graphene oxide nano-material and application of magnetic graphene oxide nano-material
  • Preparation method of IL, magnetic graphene oxide nano-material and application of magnetic graphene oxide nano-material
  • Preparation method of IL, magnetic graphene oxide nano-material and application of magnetic graphene oxide nano-material

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preparation example Construction

[0069] Such as figure 1 As shown, the preparation method of the ionic liquid 1-vinyl-3-octylimidazole-anthraquinone-1-sulfonate (IL) provided by the embodiment of the present invention comprises the following steps:

[0070] S101: Dissolve 1.0g of 1-vinyl-3-octyl-imidazolium bromide and 1.0g of sodium anthraquinone-1-sulfonate in 200mL of ultrapure water, mix the two solutions, and stir overnight at room temperature;

[0071] S102: Put the mixed solution in a separatory funnel, add 200 mL of chloroform to extract IL (1-vinyl-3-octyl-imidazole-anthraquinone-1-sulfonate), collect the lower layer of chloroform solution, and repeat the operation Once, combine the chloroform extraction solution;

[0072] S103: Place 1 L of chloroform extraction solution in a separatory funnel, add 400 mL of ultrapure water for extraction and washing, and repeat the operation until no bromide ions are detected in the water phase;

[0073] S104: Put the IL-dissolved chloroform solution in a rotary...

Embodiment 1

[0105] (1) Preparation of magnetic Fe 3 o 4 @SiO 2 nanomaterials

[0106] Add 3.40g of ammonium ferrous sulfate hexahydrate and 8.35g of ammonium ferrous sulfate dodecahydrate into 300mL of ultrapure water at 50°C under nitrogen protection, add 20mL of 8mol / L ammonia water dropwise, and sonicate for 10min. The mixture was adjusted to pH 11-12 with NaOH, stirred at 1200 r / min at 50°C for 2 h, and the black precipitate was separated by an external magnetic field and washed with water until neutral. The precipitate was dispersed in 20mL ultrapure water, 1.7mL polyvinylpyrrolidone was added, and stirred at room temperature for 24h, the obtained Fe 3 o 4 The nanomaterials were washed three times with water and ethanol, respectively, and dried in vacuum. 1.4g Fe 3 o 4 Disperse in a mixed solution containing 280mL ethanol, 70mL ultrapure water, and 5mL ammonia water, stir at 30°C for 15min, add 4mL ethyl orthosilicate dropwise, and stir at room temperature for 8h. Product Fe ...

Embodiment 2

[0116] Each process step is according to embodiment 1, only the IL consumption in the step (5) is changed into 0.4g.

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Abstract

The invention belongs to the technical field of plant growth regulators, and discloses a preparation method of IL, a magnetic graphene oxide nano-material and an application of the magnetic graphene oxide nano-material. A synthesized magnetic material is used as an adsorbent in an established magnetic solid phase extraction technology and dispersed in a sample solution, fully adsorbs a target substance and can reach adsorption equilibrium with seven plant growth regulators in a short time, only 5 min is taken in the adsorption process, and a small quantity of organic solvent is used; the adsorbent is separated from the sample solution by an external magnetic field. Compared with traditional solid phase extraction and dispersive solid phase extraction, operations such as column filling, centrifugation, filtration and the like can be omitted. The seven plant growth regulators are analyzed qualitatively and quantitatively based on magnetic solid phase extraction-ultrahigh performance liquid chromatography-tandem mass spectrometry of the synthetic material, and characteristics of high specificity, high sensitivity and good precision are achieved.

Description

technical field [0001] The invention belongs to the technical field of plant growth regulators, and in particular relates to a preparation method of IL, a magnetic graphene oxide nanometer material and applications thereof. It also relates to a β-cyclodextrin functionalized magnetic graphene oxide nanomaterial supported by an ionic liquid 1-vinyl-3-octyl imidazole-anthraquinone-1-sulfonate; specifically relates to an IL-loaded β- Preparation method and application of cyclodextrin functionalized magnetic graphene oxide nanomaterials. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: At present, the commonly used prior art in the industry is as follows: plant growth regulators are a class of artificially synthesized pesticides that have similar physiological and biological properties to natural plant hormones. It can effectively regulate the growth and metabolism of plants at low concentrations, and is widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/58C07C303/32C07C309/44B01J20/06B01J20/10B01J20/20B01J20/22B01J20/28G01N30/02G01N30/06
CPCB01J20/06B01J20/103B01J20/20B01J20/22B01J20/28009C07C303/32C07D233/58G01N30/02G01N30/06C07C309/44
Inventor 曹淑瑞郗存显赖国银张雷李贤良王国民
Owner INSPECTION & QUARANTINE TECH CENT OF CHONGQING ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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