Related Experiment Video
Updated: Feb 3, 2026
09:42
Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
Published on: August 7, 2016
9.1K
Magnetic solid-phase extraction of fluoroquinolones from water samples using titanium-based metal-organic framework
Lili Lian1, Xinyang Zhang1, Jie Hao1
1Department of Analytical Chemistry, Jilin Institute of Chemical Technology, No. 45 Chengde Street, Jilin 132022, PR China.
Journal of Chromatography. A
|October 25, 2018
Summary
A novel magnetic metal-organic framework (MOF) efficiently captures fluoroquinolones from water. This magnetic solid-phase extraction method offers sensitive and accurate detection in environmental samples.
Area of Science:
- Environmental Chemistry
- Materials Science
- Analytical Chemistry
Background:
- Fluoroquinolones are widely used antibiotics with potential environmental persistence.
- Effective methods are needed for detecting fluoroquinolones in water samples.
- Metal-organic frameworks (MOFs) offer tunable properties for adsorption applications.
Purpose of the Study:
- To develop a novel magnetic adsorbent for fluoroquinolone enrichment.
- To establish a sensitive analytical method for fluoroquinolone detection in water.
- To evaluate the performance of the new adsorbent in real water samples.
Main Methods:
- Construction of a core-shell titanium-based MOF functionalized magnetic microsphere (Fe3O4@Cys@MIL125-NH2).
- Application of the magnetic MOF as an adsorbent in magnetic solid-phase extraction (MSPE).
- Analysis of enriched fluoroquinolones using ultra-high performance liquid chromatography (UPLC).
Main Results:
- The Fe3O4@Cys@MIL125-NH2 exhibited strong magnetic response, hydrophilicity, and affinity for fluoroquinolones.
- The MSPE-UPLC method demonstrated good linearity and low limits of detection (0.05–0.2 μg L⁻¹).
- Satisfactory recoveries (83.8–109.4%) with low relative standard deviations (RSDs < 8.9%) were achieved for spiked water samples.
Conclusions:
- The developed Fe3O4@Cys@MIL125-NH2 magnetic MOF is a promising adsorbent for efficient fluoroquinolone enrichment.
- The MSPE-UPLC method provides a reliable approach for detecting fluoroquinolones in tap and environmental water.
- This study highlights the potential of functionalized magnetic MOFs in environmental analysis.
Keywords:
FluoroquinolonesMagnetic adsorbentMagnetic solid-phase extractionMetal-organic frameworkWater samplesMore Related Videos
Related Concept Videos
02:37Metallic Solids
20.6K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.6K
03:02Colors and Magnetism
14.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.1K
01:30Magnetism
8.8K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
8.8K
01:18Magnetic Flux
4.8K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
4.8K
01:17Magnetic Damping
1.1K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.1K
01:19Magnetic Declination
451
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...
451