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Performance Evaluation of Extraction Coatings with Different Sorbent Particles and Binder Composition
Khaled Murtada1, Emir Nazdrajić1, Janusz Pawliszyn1
1Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
Analytical Chemistry
|August 16, 2023
Summary
Choosing the right binder is crucial for solid-phase microextraction (SPME) devices. This study reveals how different binders affect sorbent particles, guiding the development of more effective extraction coatings.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Binders are essential for affixing sorbent particles in extraction devices like SPME.
- Binder selection critically impacts the coating's sorption capability and overall performance.
Purpose of the Study:
- To comprehensively investigate binder-sorbent particle interactions.
- To understand extraction mechanisms in composite coatings.
- To establish rules for predicting particle adhesion and binder distribution.
Main Methods:
- Examined five common binders: PDMS, PAN, PVDF, PTFE AF 2400, and PBI.
- Utilized HLB and C18 solid particles for broad analyte coverage.
- Analyzed binder chemistry's influence on coating performance.
Main Results:
- PDMS minimally affects sorbent properties, preserving coating characteristics.
- PTFE AF 2400 deactivates sorbent particles by interacting with their surface.
- PTFE AF 2400 coatings exhibit reduced performance and permeability for larger penetrants.
Conclusions:
- Binder choice significantly influences SPME coating performance and extraction mechanisms.
- Provides guidelines for selecting optimal binders and predicting coating properties.
- Offers a strategy for analyzing sorbent particle/binder structures for improved device design.
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