Electrospun polyacrylonitrile /MIL-53(Al) MOF@ SBA-15/ 4, 4′-bipyridine nanofibers for headspace solid-phase microextraction of benzene homologues in environmental water samples with GC-FID detection

Metal-organic frameworks (MOFs) and mesoporous silica such as SBA-15 a family of mesoporous materials have received much attention for sampling and sample preparation in analytical chemistry. In this work, electrospun polyacrylonitrile /MIL-53(Al) MOF@ SBA-15/ 4, 4-bipyridine hybrid nanocomposite (PAN/MIL-53(Al)@SBA-15/BiPy2+ 2Cl(-)) was synthesised by hydrothermal method and investigated as a novel adsorbent for headspace solid-phase microextraction (HS-SPME) of benzene homologues, (Benzene, toluene, ethylbenzene, trimethylbenzene, styrene, and p-xylene), BETXs, with gas-chromatography-flam ionisation detector (GC-FID) analysis. Under optimized conditions, calibration graphs of analytes were linear in a concentration range of 0.01-250 mu g L-1 with correlation coefficients higher than 0.9966. Limits of detection and This procedure directly determined BETXs in waters samples with recoveries ranging from 92.0 to 101.0%. The relative standard deviation (RSD) for single fiber and fiber to fiber microextraction (number of fibers = 5) were in the range of 1.8-3.2% and 3.6-5.3%, respectively. The purpose method successfully applied for microextraction and determination of 6 BETXs in water samples. The method possesses the advantages of simplicity, rapidity, cost-effectiveness, free from desorption solvent, sensitivity, and non-invasion; it provides an excellent alternative tool for determining BETXs in waters samples.

Automated summary

In this study, a novel adsorbent was synthesized using a hydrothermal method for the microextraction and determination of benzene homologues in water samples. The method offers the advantages of simplicity, rapidity, cost-effectiveness, sensitivity, and non-invasion.