Preparation method of nano silver colloid and method for detecting hexazinone by using silver colloid

A technology of nano silver glue and cycloazinone, applied in the field of detection, can solve the problems of long time consumption, complicated pretreatment and high cost, and achieve the effect of high sensitivity

Inactive Publication Date: 2019-03-01
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above problems, the present invention provides a method for preparing nano-silver colloid and a method for using the silver colloid to detect hexazinone, which overcomes the problems o

Method used

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  • Preparation method of nano silver colloid and method for detecting hexazinone by using silver colloid
  • Preparation method of nano silver colloid and method for detecting hexazinone by using silver colloid
  • Preparation method of nano silver colloid and method for detecting hexazinone by using silver colloid

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Pretreatment of copper sheet:

[0046] Cut the copper sheet into a 2cm×5cm rectangular small copper sheet, soak it in acetone, ethanol and ultrapure water for 10 minutes, and finally soak the copper sheet in 0.1mol / L HNO 3 Remove the oxide film on the surface; finally rinse with ultrapure water and dry at room temperature.

[0047] (2) Copper plated with nano-silver

[0048]Put the copper sheet in 0.02mol / L SnCl 2 and 0.02mol / L hydrochloric acid mixed solution for 1min, and dry at room temperature; secondly, the copper sheets were sequentially immersed in 0.01mol / L AgNO 3 Soak in a mixed solution with 0.5% hydroxyethyl cellulose for 5 minutes, and dry at room temperature; repeat the above steps once, and finally put the copper sheet in the SnCl 2 Soak in the solution for 1min, rinse with ultrapure water.

[0049] (3) Grafted mercapto compound

[0050] The prepared nano-silver-coated metal copper sheet was prepared at 1.0×10 -3 mol / L n-butanethiol ethanol solut...

Embodiment 2

[0064] (1) Pretreatment of copper sheet:

[0065] Cut the copper sheet into 2cm×5cm rectangular small copper sheet, soak in acetone, ethanol and ultra-pure water for 10min, and finally soak the copper sheet in 0.3mol / L HNO 3 Remove the oxide film on the surface; finally rinse with ultrapure water and dry at room temperature.

[0066] (2) Copper plated with nano-silver

[0067] Put the copper sheet in 0.04mol / L SnCl 2 and 0.03mol / L hydrochloric acid mixed solution for 4min, and dry at room temperature; secondly, the copper sheets were successively immersed in 0.01mol / L AgNO 3 Soak in a mixed solution with 0.5% hydroxyethyl cellulose for 5 minutes, and dry at room temperature; repeat the above steps once, and finally put the copper sheet in the SnCl 2 Soak in the solution for 1min, rinse with ultrapure water.

[0068] (3) Grafted mercapto compound

[0069] The prepared nano-silver-coated metal copper sheet was prepared at 1.0×10 -3 mol / L n-dodecanethiol ethanol solution so...

Embodiment 3

[0083] (1) Pretreatment of copper sheet:

[0084] Cut the copper sheet into 2cm×5cm rectangular small copper sheet, soak in acetone, ethanol and ultrapure water for 20min, and finally soak the copper sheet in 0.5mol / L HNO 3 Remove the oxide film on the surface; finally rinse with ultrapure water and dry at room temperature.

[0085] (2) Copper plated with nano-silver

[0086] Put the copper sheet in 0.05mol / L SnCl 2 and 0.05mol / L hydrochloric acid mixed solution for 7min, and dry at room temperature; secondly, the copper sheets were successively immersed in 0.01mol / L AgNO 3 Soak in a mixed solution with 0.5% hydroxyethyl cellulose for 5 minutes, and dry at room temperature; repeat the above steps once, and finally put the copper sheet in the SnCl 2 Soak in the solution for 1min, rinse with ultrapure water.

[0087] (3) Grafted mercapto compound

[0088] The prepared nano-silver-coated metal copper sheet was prepared at 1.0×10 -2 mol / L n-octadecylmercaptan ethanol solutio...

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Abstract

The method discloses a preparation method of nano silver colloid and a method for detecting hexazinone by using the silver colloid. The preparation method comprises the following steps: mixing hexazinone solutions in different concentrations with nano silver colloid, performing centrifugal separation, and testing with a laser Raman spectrometer to obtain an SERS spectrogram of the hexazinone; acquiring a relation between the hexazinone Raman spectrum absorption strength with certain wave number and the concentration, and establishing a mathematic relation between the Raman spectrum absorptionstrength and the hexazinone concentration; testing the hexazinone solution with unknown concentration by using the laser Raman spectrometer, and calculating the hexazinone concentration according tothe mathematic relation between the hexazinone Raman spectrum absorption strength with certain wave number and the hexazinone concentration. The method disclosed by the invention solves the problems of high cost, multi-step separation of a sample and the like in existing hexazinone detection, and has the advantages of easiness in operation, high sensitivity, remarkable saving of economic and timecosts and thus has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a preparation method of nano-silver colloid and a method for using the silver colloid to detect hexazinone. Background technique [0002] Hexazinone, alias Wilbur, Sentai, Lincaojing, chemical name 3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4-dione, It is a post-emergent contact herbicide developed by DuPont in the United States in 1974. Its mechanism of action is mainly to kill weeds by inhibiting the photosynthesis of plants. It is highly compatible and can kill many kinds of weeds and shrubs. It is highly toxic and long-lasting. It belongs to triazinone herbicides. The roots and leaves of plants can absorb hexazinone, and then through the conduction of xylem, the metabolism of plants is disturbed and eventually they die. Hexazinone has good stability and is stable at room temperature in an aqueous solution of pH 5-9. Long residual period, high wate...

Claims

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Application Information

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IPC IPC(8): G01N21/65G01N21/31B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCG01N21/31G01N21/658B82Y30/00B82Y40/00B22F9/24G01N2021/3125B22F1/054
Inventor 游瑞云陆德婵卢玉栋朱兰瑾卢仲柱陈玉婷
Owner FUJIAN NORMAL UNIV
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