Headspace single-drop microextration for the detection of organotin compounds

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Marine Science

Background:

• Tributyltin (TBT) compounds are persistent organic pollutants with significant environmental impact.
• Accurate determination of TBT in diverse matrices like water and sediment is crucial for environmental monitoring.
• Existing analytical methods for TBT may have limitations in efficiency or sample preparation.

Purpose of the Study:

• To evaluate the performance of single-drop microextraction (SDME) coupled with gas chromatography/mass spectrometry (GC/MS) for TBT determination.
• To optimize experimental parameters influencing SDME efficiency for TBT analysis.
• To compare SDME performance against conventional solid-phase microextraction (SPME) and liquid-liquid extraction (LLE) methods.

Main Methods:

• Single-drop microextraction (SDME) using various organic solvents.
• Gas chromatography/mass spectrometry (GC/MS) for compound separation and detection.
• Analysis of tributyltin (TBT) in water and PACS-2 sediment certified reference material (CRM).
• Comparison with solid-phase microextraction (SPME) and liquid-liquid extraction (LLE) techniques.

Main Results:

• SDME demonstrated effective extraction of tributyltin (TBT) compounds from both water and solid matrices.
• Optimization of microextraction solvent, sampling, and stirring times enhanced SDME performance.
• SDME results for TBT determination in PACS-2 CRM were comparable to conventional SPME and LLE methods.

Conclusions:

• Single-drop microextraction (SDME) is a suitable and efficient technique for the determination of tributyltin (TBT) compounds.
• SDME offers a promising alternative for the analysis of TBT in environmental samples, potentially simplifying sample preparation.
• The findings support the application of SDME-GC/MS for routine environmental monitoring of TBT.