scispace - formally typeset
Search or ask a question

Showing papers in "Journal of Chromatography A in 2004"


Journal ArticleDOI
TL;DR: This paper provides a summary of background information and methodologies used for the analysis of phenolics in foods and nutraceuticals.

1,490 citations


Journal ArticleDOI
TL;DR: It is concluded that for processes that entail transfer of a solute from one phase to another, only a small number of solute descriptors is needed to provide a reasonably accurate analysis of the process.

832 citations


Journal ArticleDOI
TL;DR: All evidence points to the ionic liquids as a unique class of polar solvents suitable for technical development, however, further work is needed to fill the gaps in the authors' knowledge of the relationship between ion structures and physicochemical properties.

582 citations


Journal ArticleDOI
TL;DR: Solvent-free microwave extraction is a green technology and appears as a good alternative for the extraction of essential oils from aromatic plants and allows substantial savings of costs, in terms of time, energy and plant material.

572 citations


Journal ArticleDOI
TL;DR: The sensory and healthy proprieties of VOO hydrophilic phenols as well as the agronomic and technological parameters that affect their concentration in the oil are discussed in this paper.

533 citations


Journal ArticleDOI
TL;DR: This work used human plasma to find the most efficient method for sample preparation and compared four widely applied precipitation methods, using trichloroacetic acid, acetone, chloroform/methanol and ammonium sulfate, as well as ultrafiltration.

467 citations


Journal ArticleDOI
TL;DR: Analytical methodologies for evaluating the volatile fraction and the sensory properties of virgin olive oils are elucidated and the relationships between volatile compounds and sensory attributes are discussed.

403 citations


Journal ArticleDOI
TL;DR: The method was used to study the occurrence of the selected pollutants in surface and groundwater used for abstraction of drinking water in a waterworks and to evaluate the removal efficiency of the different water treatments applied.

394 citations


Journal ArticleDOI
Klára Valkó1
TL;DR: This review will outline approaches to overcoming the difficulties of standardisation and describe different theoretical approaches for comparison of HPLC lipophilicity data obtained under various conditions, along with the relation of these results to biological partition/distribution.

344 citations


Journal ArticleDOI
TL;DR: A robust and sensitive method for the detection of fluoroquinolones, sulfonamides and trimethoprim has been developed and assessment of matrix interference shows that signal suppression and MDL increases with higher amounts of organic matter in the sample.

339 citations


Journal ArticleDOI
TL;DR: The performance characteristics of a combined solid-phase extraction isolation and high-performance liquid chromatography-electrospray ionization mass spectrometry analytical procedure for routine determination of the presence and concentration of human-health pharmaceuticals are described.

Journal ArticleDOI
TL;DR: The in vitro antioxidant activity of L. alba essential oil, obtained by hydrodistillation was evaluated by determination of hexanal, the main carbonyl compound released by linoleic acid subjected to peroxidation, and by quantification of this acid as its methyl ester under the same conditions.

Journal ArticleDOI
TL;DR: This review introduces the reader toFAIMS, covering topics ranging from the fundamentals and extraction of physical parameters from the raw data, to applications of FAIMS extending from homeland security to environmental analysis to proteomics.

Journal ArticleDOI
TL;DR: The results showed a decline in the content of antibacterial agents throughout the sampling period of 155 days from 10 to 15 microg CTC kg(-1) soil and 20-55 microg TYL A kg(- 1) soil to below or near the LOD(soil) listed above.

Journal ArticleDOI
TL;DR: Among the different off-line sample preparations, LLE was the most efficient extraction procedure and on-line SPE-LC-MS configuration exhibited matrix effects, which depend on the API source and the extraction support.

Journal ArticleDOI
TL;DR: It is shown that the Oasis cartridges produced the best recoveries of target EDCs while ethyl acetate was efficient in eluting EDCs from SPE cartridges, and the recovery of some EDCs was enhanced by the addition of salt, but reduced by the increase in pH value and humic acid concentration.

Journal ArticleDOI
TL;DR: The hydrophobic-subtraction model has been used to characterize the selectivity of reversed-phase column types (e.g., C1-C30, cyano, phenyl, etc.) as discussed by the authors.

Journal ArticleDOI
TL;DR: This work has used the ability of different lectins to recognize specific glycosylation motifs to develop a specific affinity system that can achieve a comprehensive capture of serum glycoproteins through a multi-lectin affinity column.

Journal ArticleDOI
TL;DR: Dynamic methods analysing concentration profiles that could be detected at the outlet of fixed-beds packed with the stationary phase of interest and recommendations are given regarding the potential and the applicability of the methods discussed.

Journal ArticleDOI
TL;DR: Toluene was demonstrated to be the best exchange solvent due to its miscibility with MeCN and stronger responses of relatively more polar pesticides as compared to hexane and isooctane; therefore solvent exchange is generally not required before GC analysis.

Journal ArticleDOI
TL;DR: Protein A affinity chromatography is often employed as a capture step to meet the purity, yield, and throughput requirements for pharmaceutical antibody purification, but a trade-off exists between step performance and price.

Journal ArticleDOI
TL;DR: Seven polymeric solid-phase extraction sorbents were evaluated with regard to their ability to extract acidic, neutral and basic pharmaceuticals and estrogens simultaneously from water at neutral pH to refine an extraction method for the quantitative determination of acidic and neutral drugs in surface water samples at detection limits below 1 ng/l.

Journal ArticleDOI
TL;DR: It is shown, that silanization of the surfaces do not form stable supports for chromatography, and the success of polymer modified surfaces such as polybutadiene (PBD) and polystyrene (PS) is emphasized.

Journal ArticleDOI
TL;DR: Simple and robust analytical protocols to determine the 16 polycyclic aromatic hydrocarbons of the US Environmental Protection Agency priority list in water, sediment and mussels are described and each method performance is discussed for the three matrices analysed.

Journal ArticleDOI
TL;DR: Examples of applications of the knowledge of liquid-liquid partition coefficient in the vast world of solvent extraction and hydrophobicity estimation are presented.

Journal ArticleDOI
TL;DR: The excellent sensitivity and selectivity of LC-MS-MS method allowed quantitation and identification at low levels also in difficult matrices with a run time of 20 min.

Journal ArticleDOI
TL;DR: The most significant advances achieved in the last years in the field of the identification and quantification of these pigments in cereals and the present uses of the commercial extracts of anthocyanins obtained from these sources and the perspectives for their use are included.

Journal ArticleDOI
TL;DR: Qualitative analysis of the extracted fat showed that the application of ultrasound does not change the composition of the oil, and the results agree well with those obtained by conventional Soxhlet extraction and the ISO reference method, both in terms of efficiency and precision.

Journal ArticleDOI
TL;DR: The described HILIC-MS-MS method is suitable for therapeutic drug monitoring and for clinical and pharmcokinetical investigations of the aminoglycosides.

Journal ArticleDOI
TL;DR: This review describes the essential background and toxicity of arsenic in the environment, and more importantly, some currently used chromatographic applications and sample handling procedures necessary to accurately detect and quantify arsenic in its various chemical forms.