Green aspects, developments and perspectives of liquid phase microextraction techniques.

Area of Science:

• Analytical Chemistry
• Environmental Science
• Separation Science

Background:

• Trace analyte determination in complex environmental samples is crucial for pollution monitoring and research.
• Existing analytical methods often lack sensitivity, necessitating analyte isolation and enrichment.
• Liquid-phase microextraction (LPME) offers a sensitive approach for sample preparation.

Purpose of the Study:

• To review recent advancements and innovations in LPME techniques.
• To critically evaluate the application of these techniques in analytical practice.
• To highlight pro-ecological aspects and novel extracting agents for LPME.

Main Methods:

• Review of single-drop microextraction (SDME), hollow fiber liquid-phase microextraction (HF-LPME), and dispersive liquid-liquid microextraction (DLLME).
• Discussion of system miniaturization, automation, ultrasound, physical agitation, and electrochemical methods.
• Evaluation of novel, non-toxic extracting agents, including ionic liquids, coacervates, and surfactant solutions.

Main Results:

• Newer LPME techniques demonstrate enhanced efficiency for trace analyte isolation.
• Modifications improve system performance through miniaturization, automation, and advanced extraction aids.
• Pro-ecological approaches utilize safer, greener solvents and extraction media.

Conclusions:

• Liquid-phase microextraction techniques are evolving with innovative methods and greener solvents.
• These advancements improve the efficiency and environmental compatibility of trace analyte determination.
• Further development in LPME is essential for effective environmental analysis and pollution assessment.