Comparison and application of two microextractions based on syringe membrane filter

Area of Science:

• Analytical Chemistry
• Separation Science
• Pharmacognosy

Background:

• Traditional Chinese medicine (TCM) analysis requires sensitive methods for flavonoid determination.
• Existing methods for flavonoid extraction can be time-consuming and solvent-intensive.

Purpose of the Study:

• To develop and evaluate two novel syringe membrane filter microextraction techniques.
• To enable simultaneous enrichment and determination of trace flavonoids in TCM.
• To compare the performance and mechanisms of the proposed methods.

Main Methods:

• Development of syringe membrane filter solid phase microextraction (SMF-SPME).
• Development of syringe membrane filter liquid/solid phase microextraction (SMF-L/SPME).
• Coupling of both methods with high-performance liquid chromatography (HPLC) for analysis.

Main Results:

• Both SMF-SPME and SMF-L/SPME demonstrated simple operation and rapid extraction.
• The methods showed minimal or no organic solvent consumption, enhancing environmental friendliness.
• Optimized conditions yielded good linearity, accuracy, precision, and low limits of detection for flavonoids.
• Successful application in concentrating flavonoids from TCM samples.

Conclusions:

• The proposed SMF-SPME and SMF-L/SPME techniques are effective for trace flavonoid analysis in TCM.
• These methods offer advantages in terms of speed, simplicity, and reduced solvent usage.
• The study provides insights into the microextraction mechanisms for improved analytical strategies.