Showing papers in "Journal of Chromatography A in 2008"

TL;DR: This review focuses on their use in separation techniques: gas chromatography, liquid chromatography and electrophoretic methods (CE), which found uses in different sub-disciplines of analytical chemistry.

TL;DR: USAEME is proposed as an efficient, fast, simple and non-expensive alternative to other extraction techniques such as SPE, SPME and LPME for the analysis of environmental waters including bottled, tap, river, municipal swimming pool, sewage and seaport water samples.

TL;DR: In this review, LPME will be discussed with focus on extraction principles, historical development, fundamental theory, and performance.

TL;DR: This review discusses the column efficiency of HILIC materials in relation to solute and stationary phase structures, as well as comparisons between particle-packed and monolithic columns.

TL;DR: A simple dispersive liquid-liquid microextraction method based on solidification of a floating organic drop (DLLME-SFO) technique combined with gas chromatography/electron-capture detection (GC/ECD) or gas Chromatography/mass spectrometry ( GC/MS) has been developed and overcomes the most important problem in DLLME, the high-toxic solvent used.

TL;DR: A novel type of superparamagnetic silica-coated (Fe3O4/SiO2 core/shell) magnetite nanoparticle modified by surfactants has been successfully synthesized and was applied as an effective sorbent material for the pre-concentration of several typical phenolic compounds from environmental water samples.

TL;DR: The development of an extraction procedure which enables the measurement of a wide spectrum of pharmaceuticals at trace levels with quite simple equipment and results obtained have demonstrated the suitability of the method for multi-residue analysis of different types of water matrices.

TL;DR: The literature on comprehensive two-dimensional gas chromatography (GC x GC) is reviewed, with emphasis on application-oriented studies published in the period 2004-2006, and the high potential of GC x GC combined with time-of-flight mass spectrometric detection is highlighted.

TL;DR: This review provides a comprehensive table listing the applications of on-line preconcentration in capillary electrophoresis.

TL;DR: The review highlights the fundamentals and the most prominent achievements in the field of high-performance liquid chromatography (HPLC) column development over a period of nearly 50 years and treats the major steps and processes in the manufacture of a particle packed column.

TL;DR: Comprehensive two-dimensional (2D) liquid chromatographic (LC x LC) techniques can be considered innovative methods only recently developed and adopted in many configurations, offering a high peak capacity to resolve samples of great complexity.

TL;DR: The present status of the passive sampling technology and its applications will be discussed along with aspects related to its regulatory acceptance and recent trends.

TL;DR: Results obtained indicated that this system could be tuned to a great extent because ionic liquids can be designable and the method does not suffer from the limitations of that in conventional solvent micro-extraction.

TL;DR: A synopsis of the fundamentals underlying protein adsorption and its impact on CE performance is provided and the efficacy of small molecule background electrolyte additives, surfactants, physically adsorbed polymers (dynamic and static), and successive multiple ionic-polymer layer coatings are evaluated.

TL;DR: It was demonstrated that the amount of co-extracting compounds that cause ionization suppression of aldicarb depends on the apple variety as well as on the sample preparation method employed.

TL;DR: A rapid and sensitive liquid chromatography-tandem mass spectrometry method, in electrospray ionization positive mode, has been developed for the determination of 160 selected multi-class pesticides over a 33-min run time on tomato, pear and orange matrices.

TL;DR: It is suggested that the combination LC(x)xLC(t) shows exceptional promise because it permits the simultaneous second-dimension separations of all the fractions separated in the first-dimension, thus providing remarkable time saving.

TL;DR: The fabrication and functionalization of monoliths were summarized and discussed, with the aim of presenting how monolithic technology has been playing as an attractive tool for improving the power of existing chromatographic separation processes.

TL;DR: A simple, selective and fast multi-residue method was developed to determine 18 veterinary drugs in milk by ultra-high-pressure liquid chromatography coupled to tandem quadrupole mass spectrometry, validated in terms of linearity, trueness, precision, limits of detection (LODs) and quantification.

TL;DR: The aim of this study is to prepare ly sozyme-imprinted supermacroporous cryogels which can be used for the purification of lysozyme (Lyz) from egg white and the Lyz-MIP cryogel could be used many times without decreasing the adsorption capacity significantly.

TL;DR: This proposed method was successfully applied in the analysis of four real environmental water samples and good spiked recoveries were obtained, indicating that temperature-controlled ionic liquid dispersive liquid-phase microextraction had excellent application prospect in environmental field.

TL;DR: The present article briefly reviews the use of gas chromatography-O in the flavour investigation of dairy products, coffee, meat and fruits, with particular attention to extraction techniques, GC-O hardware commonly utilised and olfactometric assessment methods.

TL;DR: This review gives an overview of chiral separation principles and their applications in capillary electromigration techniques and only recent applications are summarized.

TL;DR: The essential oils extracted by MHG were quantitatively and qualitatively similar to those obtained by conventional hydrodistillation for 90 min, and prevents pollution through potential 90% of energy saved which can lead to greenhouse gas emission benefits.

TL;DR: Preparation methods of monolithic silica columns for HPLC including the surface modification were reviewed and chemical modification methods recently reported to obtain stationary phases for reversed-phase (RP), chiral, ion-exchange, and hydrophilic interaction chromatography (HILIC) separations were discussed.

TL;DR: The pressure drop characteristics, mass transfer properties, scale-up, and applications of monoliths in the context of conventional chromatography media are discussed.

TL;DR: Both methods were found to be simple, fast, efficient, and inexpensive for the analysis of organosulfur pesticides in environmental and beverage samples by gas chromatography-flame photometric detection (GC-FPD).

TL;DR: A new class of stationary phase coatings for solid-phase microextraction (SPME) based on polymeric ionic liquids (PILs) is presented, which exhibit exceptional film stability, high thermal stability, reproducible extraction efficiencies, and long lifetimes.

TL;DR: The solid-phase extraction procedure (SPE) for isolation and preconcentration of phenolic acids and some flavonols from honey samples prior to their determination by HPLC is reported.

TL;DR: The method was applied to the determination of the volatile compounds associated to oxidation of Atlantic horse mackerel (Trachurus trachurus) minced muscle and excellent correlations were obtained with chemical indexes for monitoring lipid oxidation as peroxide value and thiobarbituric acid reactive substances.