SPME Fiber Assemblies

By controlling the polarity and thickness of the coating on the fiber, maintaining consistent sampling time, and adjusting several other extraction parameters, an analyst can ensure highly consistent, quantifiable results from low concentrations of analytes.
The original SPME fibers were manufactured with 24 gauge needles, and these continue to work well for manual sampling. Fibers with 23 gauge needles are highly recommended for use with autosamplers, and for the Merlin Microseal® system as well as other septum-less seals.