A double-functionalized polymeric ionic liquid used as solid-phase microextraction coating for efficient aromatic...

Area of Science:

• Analytical Chemistry
• Environmental Science

Background:

• Aromatic amines are significant environmental pollutants.
• Sensitive detection methods are crucial for monitoring water quality.

Purpose of the Study:

• To develop a new solid-phase microextraction (SPME) fiber for trace aromatic amine extraction.
• To establish an optimized headspace SPME-gas chromatography-mass spectrometry (GC-MS) method.

Main Methods:

• Synthesis of a novel polymeric ionic liquid with benzene and ether functional groups.
• Optimization of SPME parameters: temperature, time, alkali, and salt concentration.
• Detection of aromatic amines using GC-MS.

Main Results:

• High correlation coefficients (≥0.996) for amine concentrations from 0.01 to 10 μg mL⁻¹.
• Low limits of detection (as low as 0.67 ng mL⁻¹), surpassing polyacrylate fibers.
• Good reproducibility (RSD < 8.3% intra-fiber, 8.9–15.2% inter-fiber) and recovery (85.3–101.9%) in water samples.

Conclusions:

• The new polymeric ionic liquid SPME fiber provides an efficient and sensitive method for aromatic amine analysis.
• The developed method demonstrates excellent performance for environmental water sample analysis.
• The fiber exhibits a long lifetime and good solvent resistance.