Construction of a portable sample preparation device with a magnetic poly(methacrylic acid-co-ethylene dimethacrylate) monolith as the extraction medium and its application in the enrichment of UV filters in water samples

Abstract

A portable sample preparation device with a magnetic polymer monolith as the extraction medium was constructed. The monolith was synthesized by polymerizing methacrylic acid and ethylene dimethacrylate around a cylindrical magnet. In this way, the monolith with a magnetic core could be readily attached to the extraction device by magnetism. The constructed device was evaluated for the enrichment of UV filters in water samples, followed by high-performance liquid chromatographic analysis. The extraction efficiency for the targets was satisfactory with no matrix interference. Good linearities were obtained for the UV filters with the correlation coefficients >0.9986. The limits of detection and quantification for the UV filters were 0.3-0.8 and 1.0-2.4 ng/mL, respectively. The recoveries of the UV filters from the spiked water samples at the concentration of 100 ng/mL were 95.3-101.7%, with relative standard deviations <10%. Accordingly, the proposed portable device was demonstrated to be suitable for on-site simultaneous sampling, purification, and preconcentration within a single step.

Highly Permeable Monolith-based Multichannel In-Tip Microextraction Apparatus for Simultaneous Field Sample Preparation of Pesticides and Heavy Metal Ions in Environmental Waters

“…Hitherto, several devices of FSP have been reported. Shi et al constructed a portable sample preparation device with a magnetic monolith as the extraction medium . The apparatus was successfully applied to perform the FSP of UV filters in water samples, but the synthesis of the magnetic monolith was inconvenient and the device was complicated.…”

“…They decide the types of captured analytes, the enrichment capacity, and the extraction speed. So far, several coatings and sorbents such as divinylbenzene/polydimethylsiloxane (DVB/PDMS)-based membranes, PDMS fibers/films, , and synthesized polymer , have been employed for the on-site extraction of various pollutants. Among these materials, polymer-based monoliths are attractive because they possess some features such as ample raw materials, simple synthesis, easy regulation of porous size distribution, various chemical properties, and high permeability. , Studies provide good evidence that monolithic materials are excellent candidates for use as sorbents. , In the present study, on the basis of the requirement of FSP, a new polymer monolith-based multichannel in-tip microextraction apparatus (ITMA) for the simultaneous FSP of different families of analytes including pesticides and heavy metal ions (HMIs) in environmental waters was designed and constructed.…”

“…Shi et al constructed a portable sample preparation device with a magnetic monolith as the extraction medium. 5 The apparatus was successfully applied to perform the FSP of UV filters in water samples, but the synthesis of the magnetic monolith was inconvenient and the device was complicated. In Zhou and coworkers' study, an automated portable solid-phase extraction (SPE) device using magnetic microspheres as an adsorbent was developed and used for the on-site preparation of pharmaceutical and personal care products in water samples.…”

“…They decide the types of captured analytes, the enrichment capacity, and the extraction speed. So far, several coatings and sorbents such as divinylbenzene/ polydimethylsiloxane (DVB/PDMS)-based membranes, 13 PDMS fibers/films, 14,15 and synthesized polymer 5,16 have been employed for the on-site extraction of various pollutants. Among these materials, polymer-based monoliths are attractive because they possess some features such as ample raw materials, simple synthesis, easy regulation of porous size distribution, various chemical properties, and high permeability.…”