Efficient Solid-Phase Extraction of Neonicotinoid Insecticides from Environmental Water and Drink Samples Using a...

Area of Science:

• Environmental Chemistry
• Materials Science
• Analytical Chemistry

Background:

• Neonicotinoid insecticides (NNIs) are widely used globally, leading to extensive environmental contamination.
• Developing sensitive methods for detecting NNI residues is crucial for environmental monitoring and safety.

Purpose of the Study:

• To synthesize and utilize a modified metal-organic framework, MIL-101-SO3Na, for the efficient solid-phase extraction of NNIs.
• To enhance the interaction forces and electrostatic attraction for improved NNI adsorption.

Main Methods:

• Postmodification of MIL-101 using chloromethylation and nucleophilic substitution to introduce -NH- and sulfonate groups.
• Utilizing the modified MIL-101-SO3Na for solid-phase extraction of NNIs from various sample matrices.
• Characterization of the material's properties, including specific surface area and interaction mechanisms.

Main Results:

• The modified MIL-101-SO3Na exhibited a high specific surface area (998 m2·g-1) and enhanced adsorption capabilities.
• The method achieved a low detection limit (0.04-0.87 ng·L-1) and a wide linear range (1-2000 ng·L-1).
• Accurate quantification of NNIs in water, drink, fruit juice, and tea samples with minimal variation (3.02-11.8%).

Conclusions:

• Postmodified MIL-101-SO3Na is a highly effective adsorbent for sensitive and accurate detection of ultratrace neonicotinoid insecticide levels.
• This approach demonstrates significant potential for practical applications in analyzing complex environmental and food samples.
• The strategy of material modification offers a promising route for developing advanced analytical tools for pesticide residue monitoring.