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Preparation of ionic liquid coated amino silanization magnetic graphene oxide composite material and application of composite material in heavy metals

An aminosilanization and ionic liquid technology, which is applied in the field of heavy metal detection in food samples, can solve the problems that the pretreatment method cannot meet the detection requirements of the instrument, and achieve the effect of achieving electrostatic stability and improving adsorption performance

Active Publication Date: 2020-07-24
JIANGSU OCEAN UNIV
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AI Technical Summary

Problems solved by technology

[0005] For the inspection of trace heavy metals in samples with complex components, a single pretreatment method often cannot meet the detection requirements of the instrument

Method used

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  • Preparation of ionic liquid coated amino silanization magnetic graphene oxide composite material and application of composite material in heavy metals
  • Preparation of ionic liquid coated amino silanization magnetic graphene oxide composite material and application of composite material in heavy metals
  • Preparation of ionic liquid coated amino silanization magnetic graphene oxide composite material and application of composite material in heavy metals

Examples

Experimental program
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Embodiment 1

[0048] Example 1: Analysis and determination of Pb(II), Cu(II), and Cd(III) heavy metal ions in shellfish samples

[0049] (1) MGO@SiO 2 -Synthesis of APTES-IL nanocomposites

[0050] (1.1) Synthesis of MGO

[0051] MGO nanocomposites were synthesized by chemical co-precipitation method. 0.5 g of graphene oxide (GO) powder and 100 mL of distilled water were added to a three-necked round-bottomed flask, and mechanically stirred until the temperature of the water bath rose to 70 °C; after that, 2.16 g of six Ferric chloride hydrate and 0.80 g of ferrous chloride tetrahydrate were dissolved in 40 mL of distilled water; this solution was then added to the dispersion at 70 °C with vigorous stirring. The pH value of the suspension was adjusted to 12 by adding NaOH solution, and the mixture was mechanically stirred at 70 °C for 60 minutes; the reaction system was carried out under nitrogen protection; after cooling to room temperature, a magnet was used to collect the solid phase p...

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Abstract

The invention relates to a method for enriching and extracting three heavy metal ions in a shellfish sample and simultaneously determining the content of the three heavy metal ions, and specifically relates to preparation of an ionic liquid coated amino silanization magnetic graphene oxide (MGO (at) SiO2-APTES-IL) nano composite material and application of the nano composite material in detectionof three target heavy metals in a shellfish sample. According to the method, MGO (at) SiO2-APTES-IL is adopted as an adsorbent, the shellfish sample is pretreated by adopting dispersive magnetic solid-phase microextraction (d-MSPE), and target heavy metals including lead (II), copper (II) and cadmium (II) are sensitively determined by taking inductively coupled plasma mass spectrometry (ICP-MS) asa detection tool; the composite material can extract and enrich trace target heavy metal elements under the interference of the sample matrix, and still shows good adsorption performance in multipletimes of cyclic utilization. According to the method, main influence factors influencing adsorption and desorption of the target heavy metal ions are researched and optimized, experimental results meet the requirements for high sensitivity and high accuracy, and a new method is provided for detection of the three target ions in shellfish.

Description

technical field [0001] The invention belongs to the technical field of heavy metal detection in food samples, and in particular relates to the preparation of an aminosilanized magnetic graphene oxide nanocomposite material coated with ionic liquid and its application in the detection of three target heavy metals in shellfish samples. At the same time, it provides a sensitive and efficient detection method for heavy metal ions in food samples. Background technique [0002] In recent years, human activities such as fossil fuel combustion, mining, incineration, chemical production, and substandard industrial wastewater discharge have caused serious pollution of marine water bodies, among which heavy metal pollution is considered to be the most obvious form of pollution. Heavy metal ions are not biodegradable, resulting in their long-term presence in marine ecosystems. Even in extremely low concentrations, heavy metals can reach the human body through the bioaccumulation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28G01N27/62B01J20/30G01N27/626
CPCG01N27/62B01J20/20B01J20/0229B01J20/0288B01J20/22B01J20/28009
Inventor 高珣秦昆明赵龙山董欣怡
Owner JIANGSU OCEAN UNIV
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