Covalent organic framework in situ grown on the metal–organic framework as fiber coating for solid-phase microextraction of polycyclic aromatic hydrocarbons in tea

Polycyclic Aromatic Hydrocarbons’ Impact on Crops and Occurrence, Sources, and Detection Methods in Food: A Review

“…The COF/MXene fiber also provides high enhancement factors (483-598) and a long lifetime (300 cycles of use), highlighting its impressive chemical stability and potential to reduce experimental costs. Furthermore, Xu et al [163] introduced a novel MIL-88-NH2/COF composite coated on stainless steel wires as an HS-SPME fiber in the detection of five PAHs (Nap, Acen, Aceny, Phen, and Flu) in tea samples by GC-FID. The LODs of the selected PAHs were obtained in the range of 0.019-0.023 ng/mL.…”

“…GC is a popular chromatographic technique for PAHs' detection in food matrices since PAHs are thermally stable and the majority are volatile and readily vaporized. PAH analyses using GC are accompanied by detectors such as MS [159,161,[168][169][170][171][172][173], MS/MS [154,[174][175][176], FID [121,160,162,163], or high-resolution MS (HRMS) [57,85,177] Nevertheless, more recent studies tend to utilize MS combined with GC to detect PAHs in food as it offers better method sensitivity, selectivity, and identification abilities compared to FID, and is more convenient and cost-effective than MS/MS and HRMS. In some nations, GC-MS is a component of national standard methods for the determination of PAHs in different food categories (e.g., cereals/cereal products, meats/meat products, and aquatic foods/aquatic food products) [178].…”

“…Recent examples of GC-FID used to determine PAHs in food matrices include edible oils, honey, tea, etc. [121,160,162,163].…”

Ultrasensitive fluorometric determination of aluminum using the CoFe2O4 NPs/SDS/oxine system with the aid of ultrasound waves

“…Consequently, it nds widespread application in extracting various compounds from intricate matrices, encompassing biological, food, and environmental samples. 25,26 In recent years, magnetic nanoparticles have garnered substantial attention for their potential applications. Specically, cobalt ferrite nanoparticles (CoFe 2 O 4 NPs) have been examined for various uses, including ferrouids, adsorption processes, and microwave devices, owing to their remarkable mechanical hardness, chemical stability, and high electromagnetic performance.…”

An electrochemically fabricated ZIF-67/[HOEMIM]BF4 coating for the solid-phase microextraction and detection of polycyclic aromatic hydrocarbons

“…11–13 Up to now, SPME-GC has been widely applied in the content detection of various trace compounds including polycyclic aromatic hydrocarbons. 14–16 The coating of SPME closely determines the extraction performance of SPME. There are many options for coating types, commercial coatings such as divinylbenzene and polydimethylsiloxane are the most common and convenient choice, but their application is limited to some degree by their high price, inapplicability to samples with significant matrix effects, approximate coverage of the polarity of the target analyte, and small application temperature range (240–280 °C).…”