Solid phase microextraction (SPME)-transmission mode (TM) pushes down detection limits in direct analysis in real...

Area of Science:

• Analytical Chemistry
• Mass Spectrometry
• Separation Science

Background:

• Traditional methods for analyzing small molecules in complex matrices often involve lengthy extraction procedures and organic solvents.
• Developing rapid, sensitive, and reproducible analytical techniques is crucial for efficient sample analysis.

Purpose of the Study:

• To develop and validate a novel Solid-Phase Microextraction (SPME) device for the efficient extraction and enrichment of small molecules.
• To couple this SPME device with Direct Analysis in Real-Time (DART) mass spectrometry for enhanced detection capabilities.
• To evaluate the speed, sensitivity, and reproducibility of the combined SPME-DART system.

Main Methods:

• Development of a new SPME device designed for solventless extraction and enrichment.
• Integration of the SPME device as a transmission mode substrate for DART mass spectrometry.
• Analysis of small molecules in complex matrices using the coupled SPME-DART system.

Main Results:

• The developed SPME device facilitated quick, solventless extraction and enrichment of small molecules.
• The SPME-DART system achieved limits of detection in the low picogram per milliliter (pg mL(-1)) range.
• Analysis time was reduced to less than 3 minutes with reproducibility below 5% relative standard deviation (RSD).

Conclusions:

• The novel SPME device coupled with DART-MS offers a rapid and highly sensitive method for analyzing small molecules.
• This solventless approach simplifies sample preparation and reduces environmental impact.
• The technique demonstrates excellent performance for complex matrix analysis, suitable for various applications.