Magnetic fiber headspace solid-phase microextraction of Ferulago angulata volatile components using Preyssler‐type polyoxometalate/metal–organic framework/silica aerogel sorbent

A new hybrid of silica aerogel with a Preyssler-type polyoxometalate and MIL-101(Cr) metal-organic framework was prepared and used as a highly porous fiber coating for headspace solid-phase microextraction of Ferulago angulata volatile components. Applying a permanent magnetic field to the sorbent increased the extraction efficiency for most of the plant's components, up to 5.53 times. Optimization of the extraction parameters was carried out using a GC-MS instrument and by a simplex method. The extraction efficiency of the P5W30/MIL-101(Cr)/silica aerogel fiber exceeded 3.5 times of a mesoporous SBA-15 fiber. The prepared fiber was stable in multiple injections with relative standard deviations of 5.3 to 10.9% for 5 replicates. The proposed method was successfully applied to the extraction and identification of volatile components of some F. angulata samples. According to the results obtained by GC-FID, β-bourbonene, β-gurjunene, β-elemene and cedrenol were the main components of the plant.