Metal–Organic Framework‐Coated Glass Vials: A Step Forward in Analytical Platforms

Abstract

AbstractA robust microextraction device in the form of a glass vial internally coated with metal–organic frameworks (MOFs) is designed, fabricated by in situ growth of different Zr‐based MOFs, and fully characterized for its novel use as an analytical platform. This device, uniformly coated by the MOF, ensures high simplicity and short times when used as an analytical microextraction tool, as the device acts as both the sample container and the extraction device, being tested for monitoring the presence of a group of endocrine‐disrupting chemicals in pool waters. The thin film format and MOF nature allow for high extraction efficiency and preconcentration of these target contaminants. Adsorption and desorption of the analytes are studied through kinetic experiments, with uptakes up to 90% for propylparaben in the UiO‐66‐abdc vial, and an extremely fast desorption in just seconds. The UiO‐66‐abdc vial does not require more than 15 min to perform a complete extraction‐desorption cycle, with limits of detection down to 0.10 µg L−1 in pool waters. The MOF‐coated vials are demonstrated to be easily (and highly) reusable by simple washing for a few min followed by drying. The simplicity of the method can be pushed further working in static mode or by a simple manual shaking.