Details

Autor(en) / Beteiligte

• Rocío-Bautista, Priscilla
• Gutiérrez-Serpa, Adrián
• Cruz, Alexander John
• Ameloot, Rob
• Ayala, Juan H.
• Afonso, Ana M.
• Pasán, Jorge
• Rodríguez-Hermida, Sabina
• Pino, Verónica

Titel

Solid-phase microextraction coatings based on the metal-organic framework ZIF-8: Ensuring stable and reusable fibers

Ist Teil von

• Talanta (Oxford), 2020-08, Vol.215, p.120910-120910, Article 120910

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Chemical vapor deposition of MOFs (MOF-CVD) has been used to coat solid-phase microextraction (SPME) fibers with ZIF-8, by exposing ZnO layers to the linker vapor (2-methylimidazole). This ZIF-8 coating has been used as a seed layer in a following solvothermal MOF growth step in order to increase the ZIF-8 thickness. The combined MOF-CVD and solvothermal growth of ZIF-8 on the fibers result in a thickness of ~3 μm, with adequate thermal stability, and mechanical integrity when tested with methanol and acetonitrile ultrasonic treatments. The fibers have been evaluated in direct immersion mode using gas chromatography and flame ionization detection (GC-FID), for a group of target analytes including three polycyclic aromatic hydrocarbons (PAHs) and five personal care products (PCPs). The optimized conditions of the SPME-GC-FID methods include low amount of aqueous sample (5 mL), stirring for 45 min at 35 °C, and desorption at 280 °C for 5 min. The method presents limits of detection down to 0.6 μg L−1; intra-day, inter-day and inter-batch relative standard deviation values lower than 16%, 19%, and 23%, respectively; and a lifetime higher than 70 cycles. [Display omitted] •Highly stable ZIF-8 coatings for SPME fibers prepared by chemical vapor deposition of MOF.•The preparation mode ensured SPME fibers with high inter-batch reproducibility while used in DI-SPME-GC-FID.•MOF fibers performed successfully for target hydrocarbons and personal care products.•The analytical performance was compared to that of commercial SPME coatings.