Analytical method development for multiresidue determination in water using automated parallel dispersive pipette...

Area of Science:

• Environmental Chemistry
• Analytical Chemistry

Background:

• River water quality is crucial for ecosystem health.
• Monitoring organic pollutants requires efficient and sensitive analytical methods.

Purpose of the Study:

• To develop and validate an automated parallel dispersive pipette extraction (Au-Pa-DPX) technique.
• To analyze nine diverse organic compounds in river water samples.
• To establish an environmentally friendly and high-throughput method for water analysis.

Main Methods:

• Optimized acetonitrile (ACN) desorption with three cycles.
• Set pH to 8 with nine extraction cycles, no salt addition.
• Employed four cleaning cycles for DPX pipette tips to prevent carry-over.

Main Results:

• Achieved high coefficients of determination (R²: 0.9984–0.9998).
• Obtained low limits of detection (LODs: 0.33–1.67 µg L⁻¹) and quantification (LOQs: 1.00–5.00 µg L⁻¹).
• Demonstrated good precision (interday: 6.85%–18.35%, intraday: 0.96%–9.50%) and recovery (89.88%–125.56%).

Conclusions:

• The Au-Pa-DPX method is a robust, sensitive, and eco-friendly technique for multiclass organic compound analysis in river water.
• This method offers reduced solvent consumption, lower waste generation, and high throughput compared to traditional techniques.
• Au-Pa-DPX is suitable for routine environmental monitoring and water quality assessment.