Showing papers in "Journal of Chromatography A in 2017"

TL;DR: This review focuses on recent development of the uses of ILs in separation techniques focusing on alkyl methylimidazolium salts, and the introduction of tailor-made ILs for mass spectrometry detection of trace anions at the few femtogram level.

TL;DR: It is shown that PARADISe can handle more overlapping signals, lower signal-to-noise peaks and do so in a manner that requires only about an hours worth of work regardless of the number of samples, and there are no non-detects in PARADise, meaning that all compounds are detected in all samples.

TL;DR: Progress in the understanding of the HILIC technique is covered, principally over the last ten years, including the classification of columns, the factors that control retention and selectivity, and attempts to model the separation process and its kinetics.

TL;DR: Hollow porous molecularly imprinted polymer (HPMIP) was prepared via adopting a sacrificial support approach using glibenclamide as template, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross-linker and mesoporous MCM-48 nanospheres as support to supply high binding capacity.

TL;DR: Though the literature survey reveals an enormous volume of studies on the extraction chromatographic separation of actinides and lanthanides using several extractants, the focus of the present article is limited to the work carried out with amide based ligands, viz. monoamides, diamides and diglycolamides.

TL;DR: This review was an extensive update on applications of MOFs in chromatographic separation from 2014 to the present such as high-performance liquid chromatography (HPLC), capillary electrochromatography (CEC), nano-liquid Chromatography (nano-LC, and gas chromatography) and the typical applications ofMOFs in solid-phase microextraction (SPME) were discussed.

TL;DR: The apparent pH range in carbon dioxide-methanol mobile phases is close to 5.7; strong bases have little influence on the apparent pH, probably because, in this range of concentrations, they are titrated by alkoxylcarbonic acid or form ion pairs with alkoxycarbonate.

TL;DR: This review provides an overview into the use of non-conventional solvents in these microextraction techniques in the past 5 years (2012-2016).

TL;DR: The developed MISPE-CE method proved practically feasible for simultaneous selective extraction/enrichment, separation and sensitive determination of multiple targets in complicated aqueous matrices.

TL;DR: Nine organophosphorus pesticides (OPPs) were determined in environmental waters from different origins using in situ ionic liquid dispersive liquid microextraction (IL-DLLME), a preconcentration technique coupled to gas chromatography-mass spectrometry (GC-MS) using microvial insert thermal desorption.

TL;DR: The design and construction of a new hydrazone-linked chiral COF is reported from a chiral hydrazide building block and a one-pot synthetic method for the fabrication of BtaMth@SiO2 composite for HPLC separation of isomers is presented.

TL;DR: The present manuscript provides a general overview on the most common vegetable oils TAGs compositions and on the related analytical methodologies recently used.

TL;DR: The present study shows the development and validation of a DI-based method by ultra-high-performance liquid chromatography quadrupole-linear ion trap analyser (UHPLC-QqLIT-MS/MS) applied to the monitoring of 115 organic microcontaminants at the ngL-1/μg L-1 level in wastewater effluents from urban WWTPs.

TL;DR: The present literature review summarizes current knowledge of NEPs and the different methodologies for the extraction of these compounds, with a particular focus on hydrolysis treatments.

TL;DR: A simple and rapid sample preparation method designated ultrasound-assisted dispersive liquid-liquid microextraction based on a deep eutectic solvent (DES) followed by high-performance liquid chromatography with ultraviolet (UV) detection (HPLC-UVD) was developed for the extraction and determination of UV filters from water samples.

TL;DR: The aim of this article is to take stock of the progress made in the field of DDA- and DIA-based protocols, and evaluate their ability to change conventional metabolomic and lipidomic data acquisition workflows through a review of HRMS instrumentation, DDA and Dia workflows, and also associated informatics tools.

TL;DR: The Fe3O4@JUC-48 magnetic nanocomposite is a promising sorbent for the rapid and efficient extraction of SAs from complex biological samples such as chicken, pork, and shrimp.

TL;DR: This work compares direct infusion and chromatography - mass spectrometry (MS) lipidomic approaches represented by three analytical methods in terms of comprehensiveness, sample throughput, and validation results for the lipidomic analysis of biological samples represented by tumor tissue, surrounding normal tissue, plasma, and erythrocytes of kidney cancer patients.

TL;DR: In order to assess if an extra virgin olive oil (EVOO) can be acknowledged with the health claim related to olive oil polyphenols, a new method to quantify these species in EVOO, by means of liquid-liquid extraction followed by HPLC-DAD/MS/MS of the hydroalcoholic extract, has been developed and validated.

TL;DR: Current approaches in the analysis of food-packaging contaminants are presented and advances in analytical methodologies have allowed unequivocal identification and confirmation of these contaminants using Liquid Chromatography coupled to High Resolution Mass Spectrometry (LC-HRMS) through mass accuracy and isotopic pattern applying.

TL;DR: In this paper, magnetic porous carbon material derived from a bimetallic metal-organic framework was explored as an adsorbent for magnetic solid-phase extraction of organochlorine pesticides (OCPs).

TL;DR: The results demonstrated that β-CD/MRGO could exhibit good supramolecular recognition, enrichment capability and high extraction recoveries toward OCPs.

TL;DR: The proposed SPE-CZE-Q-TOF-MS method is suitable for multiclass multiresidue monitoring in different types of milk samples, showing that with this new SPE sorbent cleanest extracts were obtained with a minimum number of steps in the sample treatment.

TL;DR: The magnetic activated carbon prepared (Bmi) was evaluated as a new adsorbent for ultrasonic assisted magnetic solid phase dispersive extraction of Bisphenol A from cow milk and human breast milk samples, prior to the determination by HPLC with UV detection.

TL;DR: The method was successfully applied to the determination of TMA and TEA in wastewater, salmon and mushroom samples giving satisfactory selectivity towards the studied amines.

TL;DR: The rapid and accurate GC-MS method coupled with 3D-IL@mGO MSPE procedure was successfully applied for the analysis of 16 PAHs in eleven vegetable oil samples from supermarket in Zhejiang Province, demonstrating the applicability to food safety risk monitoring in China.

TL;DR: In this work, the potential of layered double hydroxide/graphene (LDH-G) hybrid as a sorbent for extraction and preconcentration of fifteen organochlorine pesticides (OCPs) in urine samples was evaluated and demonstrated good linearity.

TL;DR: The prepared COF bonded monolithic columns not only show good homogeneity and permeability, but also give high column efficiency, good resolution and precision for HPLC separation of small molecules including polycyclic aromatic hydrocarbons, phenols, anilines, nonsteroidal anti-inflammatory drugs and benzothiophenes.

TL;DR: This manuscript addresses the development of a methodology aiming the analysis of OTA in wine samples by packed in-tube SPME in flow through extraction mode coupled to HPLC-MS/MS, and proves to be accurate at medium and higher concentration levels.

TL;DR: An enhanced targeted identification strategy is presented and validated by the selective identification of flavonoid O-glycosides (FOGs) from Carthamus tinctorius and can improve the potency, efficiency, and accuracy in the detection of new compounds from medicinal herbs and other natural sources.