https://doi.org/10.1351/goldbook.10276
Microextraction where the extraction phase is a solid.
Notes:
- This term is often narrowly used to describe an extraction process employing a syringe-based sampling device with a short length of small gauge solid fiber or wire coated with sorbent attached to one end of the plunger of the syringe to facilitate bidirectional movement of the sorbent-coated fiber (wire) through the syringe needle for extraction, storage, and desorption of extractants. For extraction the sorbent is exposed to the headspace above the sample or immersed directly into the sample solution. Sample components diffuse into and/or onto the sorbent coating until equilibrium is reached. The extractants are subsequently recovered by thermal desorption into a gas stream (typically in the liner of an injection port of a gas chromatograph) or rinsed from the sorbent coating with solvent for determination by other methods.
- The extraction phase can also be a liquid physically coated on a fiber or wire support.