Development of a solventless method for the pesticides analysis

Area of Science:

• Analytical Chemistry
• Environmental Science
• Materials Science

Background:

• Pesticide contamination in water poses significant environmental and health risks.
• Existing methods for pesticide determination can be complex, costly, and require organic solvents.
• There is a need for simple, sensitive, and cost-effective analytical techniques for volatile pesticides.

Purpose of the Study:

• To develop a novel, simple, cost-effective, and solventless chromatographic method for volatile pesticide determination.
• To utilize electrothermally prepared pencil graphite (PG) as a sensitive extraction material.
• To validate the method for the determination of Chlorpyrifos (CP) in aqueous samples.

Main Methods:

• Electrothermal activation of pencil graphite (PG) via Joule effect for enhanced extraction properties.
• Development of a solventless chromatographic extraction technique.
• Application of the method for the determination of Chlorpyrifos (CP) in various aqueous matrices.

Main Results:

• A novel, sensitive, and cost-effective chromatographic method was successfully developed.
• Electrothermally activated PG demonstrated effective extraction of Chlorpyrifos (CP).
• The method achieved acceptable recovery rates (82-111%) for CP in real water samples.

Conclusions:

• The developed method offers a simple, solventless, and sensitive approach for volatile pesticide analysis.
• Electrothermally activated pencil graphite is a promising material for environmental sample analysis.
• This technique provides a viable alternative for routine monitoring of pesticides in water.