Showing papers in "Journal of Chromatography A in 2016"

TL;DR: Multivariate data analysis indicates that the lactic acid-glucose, and 1,2-propanediol-choline chloride (PCH) NADES present a similar extraction power for anthocyanins as conventional organic solvents, and LGH exhibits an at least three times higher stabilizing capacity for cyanidins than acidified ethanol, which facilitates their extraction and analysis process.

TL;DR: Recent contributions to the understanding of the binding mechanism between chiral selectors and selectands in analytical enantioseparations dating between 2012 and early 2016 including polysaccharide derivatives, cyclodextrins, cyclofructans, macrocyclic glycopeptides, proteins and nucleotide-derived selectors are highlighted.

TL;DR: This is the most comprehensive multi-residue analytical method reported in the literature for the determination of ECs in both liquid and solid environmental matrices and to demonstrate the method's sensitivity, application to environmental samples revealed 68 and 40 ECs to be above their respective MQL in liquid environmental samples and digested sludge.

TL;DR: The importance of sample normalization in the analytical workflow with a focus on mass spectrometry (MS)-based platforms is described, a number of methods recently reported in the literature are discussed and their applicability in real world metabolomics applications are commented on.

TL;DR: An overview of analytical methods for the analysis of pesticide residues in grapes and by-products in the last decade is presented and the limitations of multi-residue methods, the future perspectives and the trends for pesticide residue analysis in grapes are reviewed.

TL;DR: A high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method that utilizes benzoyl chloride labeling for 70 neurologically relevant compounds, including catecholamines, indoleamines, amino acids, polyamines, trace amines, antioxidants, energy compounds, and their metabolites is reported.

TL;DR: The intelligent WC-TMMIPs combining water-compatibility, molecular recognition, magnetic separation, and temperature regulation proved potentially applicable for selective identification, controlled adsorption/release and high-efficiency enrichment/removal of trace targets in complicated aqueous media.

TL;DR: A review of recent contributions to the understanding of the binding mechanism between chiral selectors and selectands in analytical enantioseparations dating between 2012 and early 2016 can be found in this article.

TL;DR: In this paper, an overview of the latest developments and their application in flavonoid analysis since 2009 is provided, focusing on methodologies which provide improved LC separation of flavonoids in terms of speed and/or resolution, including ultra high pressure LC (UHPLC), monolithic and superficially porous phases, high temperature LC (HTLC) and comprehensive two-dimensional LC (LC×LC).

TL;DR: Recent developments in preparative SFC for the separation of enantiomers are reviewed, reviewing several aspects such as instrumentation, chiral stationary phases, mobile phases or purely preparative considerations including overloading, productivity or large scale chromatography.

TL;DR: The results demonstrated that with combination of highly interconnected 3D network structure and magnetism property of adsorbent, 3D-G-Fe3O4 aerogel exhibited exceptional extraction ability towards the OPPs.

TL;DR: This review covers the development of new, high efficiency chiral separation methods and stationary phases, which primarily occurred over the last 15 years, and future directions in continuing to improve chiral separations are discussed.

TL;DR: The developed method allows determination of insecticides at concentrations of 10 ng/g or less, except abamectin and tebufenozide, and values are lower than the median lethal doses LD50 for bees.

TL;DR: The most recent advances on the use of cyclodextrins as chiral selectors in capillary electrophoresis for the enantioseparation of drugs are reviewed and the most relevant applications developed to carry out the quantitation of chiral drugs, to assess theEnantiomeric purity of pharmaceutical formulations, to study their metabolism or to achieve criminalistic or forensic investigations are described.

TL;DR: A targeted post-acquisition data processing strategy, key ion filtering (KIF), to analyze untargeted mass spectral data to rapidly profile the chemical constituents of complicated herbal extracts.

TL;DR: A novel hydrazone covalent organic framework (COF) is designed and a polydopamine (PDA) method to immobilize COF on a stainless steel fiber for headspace solid-phase microextraction (HS-SPME) and the developed method was applied to the determination of pyrethroids in fruit and vegetable samples.

TL;DR: The richest S. muticum samples in terms of total phlorotannins, i.e., those from Norway, presented the highest activity, showing a good cytotoxic potential at concentrations in the medium micromolar range.

TL;DR: EMR-Lipid is a new sample preparation tool that serves as another useful option for cleanup in multiresidue analysis, particularly of fatty foods in kale, pork, salmon, and avocado.

TL;DR: The combination of MCX and NH2 was found to provide the most effective cleanup, removing the greatest number of matrix interferences and also allowing the quantification of all analyzed mycotoxins in fruits.

TL;DR: An improved classification of 31 ultra-high performance stationary phases is proposed to facilitate method development with SFC.

TL;DR: UV and MS spectra characteristics of urolithins and their phase II metabolites have been determined using different systems based on liquid chromatography coupled with diode-array or mass spectrometer detectors with different analyzers (triple quadrupole (QqQ) and quadrupoles time-of-flight (QTOF)).

TL;DR: Current capabilities, strategies, and challenges will be reviewed for sample preparation, mass spectrometry, chromatography, and data processing workflows, and considerations to increase the accuracy and speed of identifying unknown molecular species will be addressed.

TL;DR: The developed MSPE-HPLC method demonstrated high sensitivity, repeatability, simplicity, rapidity, and excellent practical applicability in separation and determination of six types of sulfonylurea herbicides in environmental water samples.

TL;DR: Four reversed phase LC columns coupled with a high field quadrupole orbitrap mass spectrometer were thoroughly compared and resulted in 430 lipid species identified from rat plasma and rat liver samples with highest confidence.

TL;DR: The novelty of this work is the characterization of general trends in the retention behavior of lipids within logical series with constant fatty acyl length or double bond number, which may be used as an additional criterion to increase the confidence of lipid identification.

TL;DR: This review will explore how classical approaches, such as those used in chemistry and biochemistry, have evolved to intersect with the new omics technologies to produce a progress in the authors' understanding of the complexity of foods.

TL;DR: The baseline separation of model analytes including alkylbenzenes, polyaromatic hydrocarbons, and anilines by the COf-LZU1-coated capillary was achieved based on the size selectivity of COF-LzU1 porous structure and hydrophobic interactions between the model Analytes and organic ligands of COFs.

TL;DR: A hybrid material composed by the metal-organic framework HKUST-1 and Fe3O4 magnetic nanoparticles has been synthetized in a quite simple manner and used in a magnetic-assisted dispersive micro-solid-phase extraction (M-d-μSPE) method in combination with ultra-high-performance liquid chromatography (UHPLC) and fluorescence detection (FD).

TL;DR: The proposed method was successfully applied to the analysis of phenols in environmental water samples and good relative recoveries were obtained with the spiking level at 2, 10, 50 μg/L, respectively.

TL;DR: With the current generation of mass spectrometers quantitation via MS(3) can be superior to MS(2) regarding specificity and accuracy when dealing with matrix issues, however, drawbacks regarding flexibility and precision have to be taken into account.