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Method for preparing nano silver sol modified by sulfonation cup arene

A technology for sulfonating calixarene and nano-silver sol, which is applied in the fields of nanomaterial chemistry and analytical chemistry, can solve the problems of unsuitable on-site detection, high time-consuming and cost, cumbersome sample processing, etc., and achieves that the modification method is simple, easy and repeatable. The effect of good performance and easy availability of ligands

Inactive Publication Date: 2008-06-11
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these techniques are sensitive and accurate, they require cumbersome sample processing, time-consuming and high cost, and most of the required instruments are expensive, bulky and heavy, require the operation of professional technicians, and are not suitable for on-site detection

Method used

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  • Method for preparing nano silver sol modified by sulfonation cup arene
  • Method for preparing nano silver sol modified by sulfonation cup arene
  • Method for preparing nano silver sol modified by sulfonation cup arene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of sulfonated calix[4]arene modified nano-silver sol

[0036] At room temperature, take 2 mL of 10 -2 mol / L silver nitrate solution, respectively added to 96mL of twice distilled water and 2 ml of 10 -2 mol / L aqueous solution of sulfonated calix[4]arene, stirred for 20 minutes. Then add 8.8 mg of sodium borohydride, and continue to stir for 5 minutes, so that the nano-silver sol modified by sulfonated calix[4]arene is prepared.

[0037] Colorimetric detection of isocarbophos in sulfonated calix[4]arene modified nano-silver sol:

[0038] 0.5mL different concentrations (10 -3 -10 -7 mol / L) of isocarbophos was added to 2 mL of sulfonated calix[4]arene-modified nano-silver sol, and mixed evenly. After 10 minutes, the color of the solution changed from yellow to red.

Embodiment 2

[0040] (1) Preparation of sulfonated calix[4]arene modified nano-silver sol

[0041] At room temperature, take 2 mL of 10 -2 mol / L silver nitrate solution, respectively added to 96mL of twice distilled water and 2 ml of 10 -2 mol / L aqueous solution of sulfonated calix[4]arene, stirred for 20 minutes. Then add 4.4 mg of sodium borohydride, and continue to stir for 5 minutes, so that the nano-silver sol modified by sulfonated calix[4]arene is prepared.

[0042] Colorimetric detection of isocarbophos in sulfonated calix[4]arene modified nano-silver sol:

[0043] 0.5mL different concentrations (10 -3 -10 -7 mol / L) of isocarbophos was added to 2 mL of sulfonated calix[4]arene-modified nano-silver sol, and mixed evenly. After 10 minutes, the color of the solution changed from yellow to red.

Embodiment 3

[0045] (1) Preparation of sulfonated calix[4]arene modified nano-silver sol

[0046] At room temperature, take 2 mL of 10 -2 mol / L silver nitrate solution, respectively added to 96mL of twice distilled water and 2 ml of 10 -2 mol / L aqueous solution of sulfonated calix[4]arene, stirred for 20 minutes. Then add 8.8 mg of sodium borohydride and continue to stir for 10 minutes, so that the nano-silver sol modified by sulfonated calix[4]arene is prepared.

[0047] Sulfonated calix[4]arene modified nano-silver sol for the detection of isocarbophos:

[0048] 0.5mL different concentrations (10 -3 -10 -7 mol / L) of isocarbophos was added to 2 mL of sulfonated calix[4]arene-modified nano-silver sol, and mixed evenly. After 10 minutes, the color of the solution changed from yellow to red.

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Abstract

The invention discloses a manufacturing method of making sulfonating calixarene modify on the surface of nano silver to obtain the nano silver sol. The specific procedures are that: firstly, silver nitrate solution and sulfonating calixarene solution with same value and same viscosity are prepared, then the solution are added in secondary distilled water, sodium borohydride is added after mixing, and the nano silver sol modified by sulfonating calixarene is obtained through continuous mixing. With simple technics, the invention synthesizes the nano silver sol modified by sulfonating calixarene, wherein, nano silver sol modified by sulfonating [4] calixarene can conduct color comparison testing to isocarbophos, with higher selectivity and sensitivity, which not only has low cost, but also the reaction is quick and sensitive. The testing limit can reach 10 <-7> mol / L and can realize on-site testing. Besides, the preparation technics are simple and easy to practice, and the operability is strong; the common laboratory has condition to finish, thus having wide application prospect.

Description

technical field [0001] The invention relates to the fields of nanometer material chemistry and analytical chemistry, in particular to the preparation of a diagnostic reagent for isocarbophos, an organophosphorus pesticide. Background technique [0002] Pesticides, especially organophosphorus pesticides, are now widely used as insecticides for crops. The combination of organophosphorus pesticides and acetylcholinesterase irreversibly inhibits the activity of acetylcholinesterase, resulting in the accumulation of acetylcholine, overstimulating the nerves, and the impulse cannot be stopped, causing a series of neurotoxic symptoms such as convulsions, paralysis, and even death. Therefore, strict detection of organophosphorus pesticides is required. Up to now, many methods for the detection of organophosphorus have been developed, such as chromatography, electrochemical method, fluorescence method. Although these techniques are sensitive and accurate, they require cumbersome pr...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 李海兵熊得军曾丽霖
Owner HUAZHONG NORMAL UNIV
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