Related Experiment Video
Updated: Jan 24, 2026

Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
Published on: February 16, 2018
[Determination of atrazine in vegetables by magnetic molecularly imprinted polymer flow injection preconcentration
Lu Wang1, Xiaoqing Feng1, Xin Song1
1Huaian Center for Disease Control and Prevention, Huaian 223001, China.
Objective:
A method for rapid determination of atrazine in vegetables by gas chromatography based on magnetic molecular imprinting technology in flow injection system was established.
Methods:
Core-shell magnetic molecularly imprinted polymers were prepared using ferroferric oxide modified with chitosan as the carrier, atrazine as the template, methacrylic acid as the functional monomer, and ethylene glycol dimethacrylate as the cross-linker. The attraction of the imprinted polymers for atrazine was studied through static equilibrium binding. The atrazine in the sample were extracted with ethyl acetate and then cleaned-up with MIPs SPE cartridges. The target molecules were eluted by methanol and then quantitatively determined by gas chromatograph.
Results:
The maximum adsorption capacity was 52. 0 mg/g. Under the optimal conditions, the linearity of the method obtained was 5-100 μg/L. The detection limits of atrazine was 0. 6 μg/kg. The recoveries were between 81. 5% and 107. 7%(n=6).
Conclusion:
The proposed method is successfully applied to determine atrazine in vegetables.
Related Concept Videos
Gas Chromatography: Sample Injection Systems
Two primary injection methods are used...
Imprinting
Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules
Gas Chromatography: Introduction
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a...
Genomic Imprinting and Inheritance
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Gas Chromatography: Overview of Detectors
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...

