Showing papers in "Journal of Chromatography A in 2022"

TL;DR: In this article , the development and application of ordered mesoporous silica materials for solid-phase extraction in recent years is discussed, which can offer an outlook for the further development and applications.

TL;DR: In this article , a stability-indicating UPLC method for the determination of impurities present in fluocinolone acetonide and its topical oil formulation was developed by implementing analytical quality by design (AQbD) and green chemistry principles.

TL;DR: In this article , a new kind of stationary phase for gas chromatography based on deep eutectic solvents (DES) in the form of a mixture of L-proline (protonated with hydrochloric acid) and xylitol as a hydrogen bond donor (HBD) in a molar ratio of HBA:HBD 5:1.

TL;DR: In this article , the authors performed a systematic study of thirteen alkylamines used as ion-pairing reagents for IP RP LC separations of oligonucleotides on a C18 column.

TL;DR: In this article , a review of the molecularly imprinted technique (MIT) for the separation of chiral drugs is presented, where the morphological differences of MIPs (micron-sized particles, nanoparticles and monolithic column materials) are taken into account.

TL;DR: The most recent developments in the field of hybrid devices based on dielectrophoresis are described and evaluated in this article , and the advantages and disadvantages of DEP-based separation devices are examined.

TL;DR: In this paper , the authors used headspace solid phase microextraction (HS SPME) coupled with flow-modulated comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (FM GC×GC-TOFMS) to characterize geographical-based differences in the volatilome of five white "Grillo" wines (of Sicilian origin), comprising the five sample classes.

TL;DR: In this article , two new hydrophilic-hydrophobic and acid-base balanced liquid chromatographic stationary phases were obtained by using two long-chain monomers including undecylenic acid (UA) and oleic acid (OA) combined with short-chain 4-vinyl pyridine (Py) in-situ polymerized on silica microspheres surfaces, respectively.

TL;DR: In this paper , modified QuEChERS and triple quadrupole mass spectrometry (LC and GC-MS/MS) technology were used to sequentially analyze pesticides, veterinary drugs, and mycotoxins in feed.

TL;DR: In this paper , a simple and efficient dispersive solid-phase extraction (D-SPE) method combined with gas chromatography tandem mass spectrometry (GC-MS/MS) was developed to determine organochlorine pesticides (OCP) in honey.

TL;DR: In this paper , a magnet integrated fabric phase sorptive extraction (MI-FPSE) was employed for the first time for the extraction and preconcentration of benzoyl urea insecticides from environmental water samples prior to their determination by high performance liquid chromatography-diode array detection (HPLC-DAD).

TL;DR: In this paper , a pipette tip solid phase extraction (PT-SPE) method was developed for fast and sensitively detecting plant growth regulators (PGRs) in food samples by integrating a novel covalent organic framework (COF) of schiff base network 3 (SNW-3) and polyacrylonitrile (PAN) through electrospinning.

TL;DR: In this paper , natural cotton fiber was served as the supporter of water, and the water acted as an extractant for liquid-phase microextraction of polar components in low-polar edible oils.

TL;DR: In this paper , a review of recent developments in synthesis and applications of covalent organic frameworks and their composites for extraction of pesticides, different synthesis approaches of COF, possible mechanisms for interaction of COFs-based adsorbents with pesticides and finally, future prospects and challenges in the fabrication and utilization of Covalent Organic Frameworks and their composite for extraction.

TL;DR: In this article , the authors provide an overview of various pre-treatment measures and detection methods for PAEs in several types of water and beverages, mainly focusing on the last 20 years published works have been discussed.

TL;DR: In this article , a number of novel stationary phases for hydrophilic interaction liquid chromatography (HILIC) containing both amides and hydroxyl groups in the functional ligand were obtained by the multicomponent Ugi reaction on the aminated silica surface.

TL;DR: In this article , a green and facile fabric phase sorptive extraction (FPSE) prior to high pressure liquid chromatography with diode array detection (HPLC-DAD) methodology was developed for the efficient extraction and quantitative determination of tocopherols (α-, sum of (β+γ), and δ-) in edible oils.

TL;DR: In this paper , a mixed-mode weak cation exchange sorbent (PS-DVB-WCX-II) was synthesized by the Friedel-Crafts acylation reaction on the surface of polystyrene-divinylbenzene.

TL;DR: In this article , a compact, inexpensive capillary electrophoresis instrument was developed for monitoring metal ions and evaluated for Zn(II) in remote contaminated locations in western Tasmania, Australia.

TL;DR: In this paper , a novel COF-TpDB via 1,3,5-triformylphloroglucinol (Tp) and 4,4'-diaminobenzoylanilide (DB) as well as its packed cartridge for solid phase extraction of carbamate pesticides was designed and synthesized.

TL;DR: In this paper , a split-flow two-dimensional liquid chromatography (SF-2D-LC) with two parallel second dimensions, LC × 2LC, combined with quadruple parallel mass spectrometry (LC3MS4) is demonstrated for analysis of NIST SRM 1849a adult/infant formula.

TL;DR: In this article , a generic sample preparation based on the QuEChERS procedure combined with dispersive liquid-liquid microextraction (DLLME) with in situ acetylation was successfully applied for quantification of pesticide residues, bisphenols, musk fragrances and UV-filters.

TL;DR: In this paper , a generic IP-RPLC method for guide RNA analysis was developed, which showed that large pore size of stationary phase was the most critical column parameter to achieve high resolution separation of sgRNA while particle structure, particle size and surface chemistry had less impact.

TL;DR: In this paper , an off-line multidimensional chromatography/high-resolution mass spectrometry approach was presented: ion exchange chromatography (IEC) as the first dimension of separation, hydrophilic interaction chromatography(HILIC) in the second dimension, and reversed-phase chromatography for the third dimension which was hyphenated to a Q Exactive Q-Orbitrap mass analyzer.

TL;DR: An enrichment bag-based liquid-phase microextraction (EB-LPME) system was proposed for the first time to isolate and enrich the illicit drugs (amphetamine, methamphetamine, 3,4methylenedioxymethamphetamine (MDMA), ketamine, codeine and fentanyl) from wastewater as discussed by the authors .

TL;DR: The transfer of neutral compounds between immiscible phases in chromatographic or environmental systems can be described by six solute properties (solute descriptors) using the solvation parameter model as mentioned in this paper .

TL;DR: In this article , a new method for simultaneous quantification of eleven short-chain fatty acids (SCFAs) by derivatization combined with solid phase microextraction (SPME) and gas chromatography tandem mass spectrometry (GC-MS/MS) was developed.

TL;DR: In this article , a composite of Fe3O4@TpBD@Au@GSH was synthesized by a two-step, post-synthesis modification strategy.

TL;DR: In this paper, a well-crystallized hydrazine-linked COF (Tf-DHzOH) was synthesized successfully from 2,5dihydroxyterephtalohydrazide and 1,3,5-triformyl-benzene.

TL;DR: A green analytical method for the simultaneous determination of 30 tropane and pyrrolizidine alkaloids and their N-oxides in dried teas and herbs for infusions has been developed and validated as mentioned in this paper .