Pulsed electromembrane extraction: a new concept of electrically enhanced extraction

Area of Science:

• Analytical Chemistry
• Separation Science

Background:

• Electromembrane extraction (EME) is a liquid-phase extraction technique.
• Existing EME methods can lack stability and repeatability.
• Efficient extraction of ionizable compounds from complex matrices is challenging.

Purpose of the Study:

• Introduce pulsed electromembrane extraction (PEME) as a novel, efficient, and cost-effective method.
• Optimize PEME parameters for extracting model analytes from biological fluids.
• Compare PEME performance against conventional EME.

Main Methods:

• Pulsed electromembrane extraction (PEME) setup.
• Optimization of extraction time, applied voltage, pulse duration, and outage period using experimental design.
• Analysis of model analytes in biological matrices.

Main Results:

• Achieved high repeatability with relative standard deviations (RSDs) below 4.4%.
• Obtained preconcentration factors of 100-140 and recoveries of 95-108%.
• Demonstrated excellent linearity (R² > 0.9955) over 5-200 ng mL⁻¹ and low limits of detection (1.0 ng mL⁻¹).

Conclusions:

• PEME is a stable and repeatable technique for ionizable compound extraction.
• PEME offers significant advantages over conventional EME in terms of efficiency and performance.
• The optimized PEME method is suitable for analyzing analytes in biological fluids.