SPME-Overcoated Fiber: Physically Robust and Resistant to Chemical Fouling

High background samples, such as many foods, pose a challenge to immersion SPME due to the presence of fats, sugars, pigments, and other macromolecules. These can stick to the SPME fiber and reduce its usable life and/or be transferred to the GC, where they may interfere with chromatographic analysis. A new development in SPME fiber technology incorporates a protective overcoating on the fiber. This overcoating, which consists of polydimethylsiloxane (PDMS) protects the fiber, making it more physically robust and less prone to chemical fouling.

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57439-U SPME-OC Fiber Assembly, Polydimethylsiloxane/Divinylbenzene (PDMS/DVB) df 75 μm (Coating thickness includes 65 μm coating + 10 μm OC (overcoating)), needle size 23 ga, pkg of 3 ea