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Preparation method of blotting membrane for Hg<2+> detection

A technology of imprinting membrane and lactam, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve problems such as being unsuitable for rapid detection and on-site detection

Inactive Publication Date: 2013-05-08
WENZHOU INST OF TECH TESTING & CALIBRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are generally completed using large analytical instruments. Although the data are accurate and reliable, they are not suitable for rapid detection and on-site detection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add N-(rhodamine B) lactam-ethylenediamine (10 mmol), triethylamine (15 mmol) and 80 mL of tetrahydrofuran into the reaction flask, slowly add methacryloyl chloride (15 mmol), after dropping, react for 1 h, remove the cold bath, and react at room temperature for 12 h. After the reaction was completed, 180 mL of ethyl acetate was added, followed by 2 wt% NaHCO 3 solution, water and saturated brine, dried over anhydrous sodium sulfate, and distilled under reduced pressure. The residue was separated by column chromatography to obtain N-(rhodamine B) lactam-N'-methacryloyl-ethylenediamine.

[0021] The polyvinylidene fluoride membrane was first immersed in 0.1 mol / L azobisisobutyronitrile solution in acetonitrile for 5 min, and then dried for later use. Dissolve N-(rhodamine B)lactam-N'-methacryloyl-ethylenediamine (0.2 mmol) and mercury nitrate (0.2 mmol) in 3 mL of methanol and stir for 30 min, then add ethylene glycol dimethyl Acrylate (2 mmol) and azobisisobutyronitri...

Embodiment 2

[0023] Add N-(rhodamine B) lactam-ethylenediamine (10 mmol), triethylamine (10 mmol) and tetrahydrofuran 80 mL into the reaction flask, slowly add methacryloyl chloride (10 mmol) dropwise at 20 °C under stirring ), after dropping, react for 1 h, remove the cold bath, and react at room temperature for 12 h. After the reaction was completed, 240 mL of ethyl acetate was added, followed by 5 wt% NaHCO 3 solution, water, and saturated brine, dried over anhydrous sodium sulfate, and distilled under reduced pressure. The residue was separated by column chromatography to obtain N-(rhodamine B)lactam-N'-methacryloyl-ethylenediamine.

[0024] The polyvinylidene fluoride membrane was first immersed in 0.2 mol / L azobisisobutyronitrile solution in acetonitrile for 5 min, and then dried for later use. Dissolve N-(rhodamine B)lactam-N'-methacryloyl-ethylenediamine (0.2 mmol) and mercury nitrate (0.3 mmol) in 3 mL of methanol and stir for 30 min, then add ethylene glycol dimethyl Acrylate (...

Embodiment 3

[0026] Add N-(rhodamine B) lactam-ethylenediamine (10 mmol), triethylamine (12 mmol) and tetrahydrofuran 80 mL into the reaction flask, slowly add methacryloyl chloride (12 mmol) dropwise at 0 °C under stirring ), after dropping, react for 1 h, remove the cold bath, and react at room temperature for 12 h. After the reaction was completed, 200 mL of ethyl acetate was added, followed by a concentration of 8 wt% NaHCO 3solution, water and saturated brine, dried over anhydrous sodium sulfate, and distilled under reduced pressure. The residue was separated by column chromatography to obtain N-(rhodamine B) lactam-N'-methacryloyl-ethylenediamine.

[0027] The polyvinylidene fluoride membrane was first immersed in acetonitrile solution of 0.15 mol / L azobisisobutyronitrile for 5 min, and then dried for later use. Dissolve N-(rhodamine B)lactam-N'-methacryloyl-ethylenediamine (0.2 mmol) and mercury nitrate (0.2 mmol) in 3 mL of methanol and stir for 30 min, then add ethylene glycol di...

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PUM

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Abstract

The invention discloses a preparation method of a blotting membrane for Hg<2+> detection. The preparation method comprises the following steps: designing and synthesizing Rhodamine derivative with special developing function to Hg<2+>; and opolymerizing on a support polyvinylidene fluoride membrane by using target metal ion as a template, ethylene dimethacrylate as a crosslinking agent, azodiisobutyronitrile as a radical initiator, and the synthesized Rhodamine derivative as a function monomer to obtain the blotting membrane for mercury ion detection. The characteristic that the ionic blotting technology has high selectivity to the template ion is adopted by the invention to combine with the simplicity of a colorimetric / fluorescence chemical sensor, a colorimetric / fluorescence chemical sensing blotting membrane with high selectivity to Hg<2+> is prepared, and a fast and high-speed new scene detection method with high sensitivity and high selectivity is hopefully provided for heavy metal ions in environment and food.

Description

technical field [0001] The invention belongs to the technical field of imprint detection, in particular to the technical field of detection of imprint detection technology on metal ions, in particular to a kind of Hg 2+ Method for preparing blotted membrane for detection. Background technique [0002] Considering the environment and food safety, heavy metal pollution is a serious problem. At present, the heavy metals with significant biological toxicity, such as mercury, cadmium, lead, chromium, and metalloid arsenic, attract the most attention. According to research, heavy metal pollution is amplified through the food chain and enters the human body with food, mainly causing chronic damage to the body. Heavy metals entering the human body will only show toxicity after a long period of accumulation. It has attracted enough attention, which has made its harmfulness even more serious. [0003] At present, the commonly used analysis methods for heavy metals in the environ...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08J7/16C08L27/16C08F220/60C08F222/14G01N21/64
Inventor 蒋武唐旭东许秀兰方道赠
Owner WENZHOU INST OF TECH TESTING & CALIBRATION
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