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Magnetic nano-material for pretreatment of trace drugs in sewage and preparation and detection methods of magnetic nano-material

A magnetic nanometer and magnetic nanoparticle technology, which is applied in the preparation of test samples, adsorbed water/sewage treatment, chemical instruments and methods, etc., can solve the problems of large environmental impact, high cost, time-consuming and labor-intensive, etc. High, low cost, the effect of avoiding the phenomenon of agglomeration

Pending Publication Date: 2022-04-12
安徽中科赛飞尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these pretreatment and detection techniques are complicated to operate, require professional technicians, and most of them use organic solvents and centrifugal filtration, which are time-consuming and labor-intensive. Moreover, conventional chromatographic columns are disposable, costly, and have a great impact on the environment. , therefore, existing methods have certain limitations

Method used

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  • Magnetic nano-material for pretreatment of trace drugs in sewage and preparation and detection methods of magnetic nano-material
  • Magnetic nano-material for pretreatment of trace drugs in sewage and preparation and detection methods of magnetic nano-material
  • Magnetic nano-material for pretreatment of trace drugs in sewage and preparation and detection methods of magnetic nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] CoFe 2 o 4 / SiO 2 / The preparation of CTAB magnetic nanomaterials, the steps are as follows: Take 20mL ultrapure water into a three-necked flask and heat it to 80°C, add 0.56g FeCl 3 ·6H 2 O and 0.26 g CoCl 2 ·6H 2 O, after stirring evenly, add 2mL of ammonia water, stir while adding, and continue to react for 1h; absorb the synthetic substance with a magnet, pour off the supernatant, wash with 50% ethanol solution for 3-5 times, and obtain CoFe after drying 2 o 4 Magnetic nanoparticles; take 1g CoFe 2 o 4 For magnetic nanoparticles, add 100mL ultrapure water, sonicate for 10min, heat to 80°C, add 5mL orthobutyl silicate, heat and stir for 12h, wash and dry according to the above method to obtain SiO 2 Modified CoFe 2 o 4 Magnetic nanoparticles; take 1g SiO 2 Modified CoFe 2 o 4 For magnetic nanoparticles, add 90mL ultrapure water, sonicate for 10min, heat to 80°C, take 10mg CTAB and dissolve it in 10mL ultrapure water, add it to the reaction system, heat ...

Embodiment 2

[0033] The detection of methamphetamine in water samples, the steps are as follows:

[0034] (1) carry out Raman detection to methamphetamine standard substance (methanol solution), obtain standard substance spectrogram;

[0035] (2) Take 200mL of lake water and put it into a beaker, add 1mL of 10ng / mL methamphetamine standard to it, mix well, adjust the pH to 3 with hydrochloric acid, add 2g of CoFe prepared in Example 1 2 o 4 / SiO 2 / CTAB magnetic nanomaterials, ultrasonic 10-30min, to make it evenly dispersed; put a magnet at the bottom of the beaker, let it stand for 5min, pour off the water sample, add 2mL methanol-1% ammonia solution to shake and analyze, and obtain the analysis solution; record it as simulation add group;

[0036] (3) Operate according to the above-mentioned step (2), the only difference is that no methamphetamine standard substance is added, and a blank control group is prepared;

[0037] (4) The analytic solutions in the simulated addition group an...

Embodiment 3

[0040] For the detection of ketamine in water samples, the steps are as follows:

[0041] (1) Carry out Raman detection to ketamine standard substance, obtain standard substance spectrogram;

[0042] (2) Take 200mL of lake water and put it into a beaker, add 1mL of 50ng / mL ketamine standard to it, mix well, adjust the pH to 4 with hydrochloric acid, add 2g of CoFe prepared in Example 1 2 o 4 / SiO 2 / CTAB magnetic nanomaterials, sonicate for 20 minutes to disperse evenly; put a magnet at the bottom of the beaker, let it stand for 5 minutes, pour off the water sample, add 2mL of methanol-1% ammonia solution to shake and analyze, and obtain the analysis solution; record it as the simulated addition group ;

[0043] (3) Operate according to the above step (2), the only difference is that a blank control group is prepared without adding ketamine standard substance;

[0044] (4) The analytic solutions in the simulated addition group and the blank control group were blown dry wit...

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Abstract

The invention discloses a magnetic nano-material for pretreatment of trace drugs in sewage and a preparation and detection method, and relates to the technical field of trace drug detection, the magnetic nano-material is obtained by taking CoFe2O4 magnetic nano-particles as an inner core, and coating SiO2 and CTAB on the surface of the CoFe2O4 magnetic nano-particles in sequence; the method for detecting the trace drugs in the sewage comprises the following steps: by taking the magnetic nano material as an adsorbent, enriching and separating the drugs in a sewage sample by adopting a magnetic solid-phase extraction method, then analyzing the adsorbent, blow-drying the analyzed liquid nitrogen, and dropwise adding urchin-shaped nano Au-Ag sol to carry out in-situ SERS (Surface Enhanced Raman Scattering) detection. The invention establishes a pretreatment and detection method for drugs in sewage, and the method has the advantages of simple operation, rapidness, high sensitivity, strong matrix interference resistance, no need of tedious operations such as use of a large amount of organic reagents, centrifugal filtration and the like, low cost and capability of meeting the detection requirements of trace drugs in sewage.

Description

technical field [0001] The invention relates to the technical field of trace drug detection, in particular to a magnetic nanometer material used for pretreatment of trace drug in sewage and a preparation and detection method. Background technique [0002] Studies have shown that drugs and their metabolites are now present in urban sewage collection systems, mainly from the excrement of drug addicts, drugs discarded by drug addicts through the sewer during raids, and wastewater discharged from drug manufacturing sites. The concentration of trace drugs and their metabolites is of great significance to the monitoring of drug use in cities. [0003] At present, the main technical difficulty of drug detection in sewage is that various organic and inorganic pollutants produced in industrial production and human life, as well as pathogenic microorganisms and various insoluble substances are collected in sewage; secondly, the drug content in sewage is extremely low, requiring high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N1/40C02F1/28B01J20/283B01J20/281B01J20/28B01J20/22B01J20/06B01J20/30
Inventor 杨良保迟敏林东岳
Owner 安徽中科赛飞尔科技有限公司
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