What is the thickness of matrix active group (polydimethylsiloxane coating)? using 100μm coating? that 100 μm coating thickness is recommended for low molecular weight or non-polar high molecular weight compounds. Or equivalent with the one in the Your Reference Literature?If want to obtain a decent result, need to pay attention to the optimization of the SPME method with PDMS: Carry-over effect / Position of the fiber in the GC injector/ Extraction conditions, such as the duration of absorption and desorption, temperature of extraction, and the polarity and structure of the fiber. (Here is the basic SPE info:
http://www.sigmaaldrich.com/Brands/Supelco_Home/Spotlights/SPME_central.html)
If use the 30 μm or a 7 μm PDMS fiber, could extract the non-polar semivolatiles or large molecular weight compounds more effectively.
So my suggestion is: try to do more research on that papers -> find out the right PDMS fiber they used. (100 μm coating or 30 μm or a 7 μm)?
Reference from Varia**: https://www.varianinc.com/media/sci/apps/spme04.pdf
