scispace - formally typeset
Search or ask a question

Showing papers in "Journal of Chromatography A in 2006"


Journal ArticleDOI
TL;DR: The ability of DLLME technique in the extraction of other organic compounds such as organochlorine pesticides, organophosphorus pesticides and substituted benzene compounds were studied.

2,959 citations


Journal ArticleDOI
TL;DR: Under the optimum conditions, the enrichment factors and extraction recoveries were high and ranged between 789-1070 and 78.9-107%, respectively, while the linear range was wide and limit of detections were very low and were between 3 to 20 pg/mL for most of the analytes.

826 citations


Journal ArticleDOI
TL;DR: The literature about the major volatile and non-volatile phytoconstituents of onion and garlic has been reviewed, with particular attention given to the different methodology developed to perform chemical analysis, including separation and structural elucidation.

786 citations


Journal ArticleDOI
TL;DR: Special attention will be devoted to the use of tandem-mass spectrometric (MS/MS) techniques for the characterization of several important sub-classes of flavonoids, and to the potential of combined diode-array UV (DAD UV), tandem-MS and nuclear magnetic resonance (NMR) detection for unambiguous identification.

627 citations


Journal ArticleDOI
TL;DR: Electrokinetic migration across thin artificial liquid membranes may be an interesting tool for future isolation within chemical analysis and may serve as an efficient tool for controlling the transport selectivity.

582 citations


Journal ArticleDOI
TL;DR: A liquid chromatography-electrospray ionization tandem mass spectrometry (ESI-MS/MS) method for reliable measurement of 141 metabolites, including components of central carbon, amino acid, and nucleotide metabolism is presented.

558 citations


Journal ArticleDOI
TL;DR: A multi-residue analytical method has been developed and validated for determining a selection of 16 pharmaceuticals: the anti-epileptic carbamazepine, seven analgesic/anti-inflammatory drugs, the analgesic opiate codeine, two antidepressants, beta-blockers, and antibiotic in hospital effluent wastewater samples.

484 citations


Journal ArticleDOI
TL;DR: This review focuses on the use of linear solvation energy relationships (LSERs) to understand the types and relative strength of the chemical interactions that control retention and selectivity in the various modes of chromatography ranging from gas chromatography to reversed phase and micellar electrokinetic capillary chromatography.

456 citations


Journal ArticleDOI
TL;DR: This paper presents several examples of applying chromatographic fingerprint analysis for determining the identity, stability, and consistency of TCHM as well as the identification of adulterants.

436 citations


Journal ArticleDOI
TL;DR: Microwave Clevenger or microwave accelerated distillation (MAD) is a combination of microwave heating and distillation, performed at atmospheric pressure without added any solvent or water, which results in more rapid opening of essential oil glands treated by MAD, in contrast to conventional hydro-distillation.

367 citations


Journal ArticleDOI
TL;DR: The results showed that many of the studied compounds pose a moderate to high persistency in sewage treatment as well as in the recipient rivers.

Journal ArticleDOI
TL;DR: Single drop microextraction (SDME) with modified 1.00 microl microsyringe is developed, followed by gas chromatography with flame photometric detector (GC-FPD) for determination of 13 organophosphorus pesticides (OPPs) in water samples.

Journal ArticleDOI
TL;DR: The aim of the present review is to give an overview on the application of LC-(API)MS in the analysis of frequently occurring and highly toxic mycotoxin, such as trichothecenes, ochratoxins, zearalenone, fumonisins, aflatoxins), enniatins, moniliformin and several otherMycotoxins.

Journal ArticleDOI
TL;DR: The synthesis of spherical particles of mesoporous silicates (SBA-15) with mesopore diameter upto 127A, and particle diameter of 4-10 microm has been achieved and have a very high capacity of 700 mg/g for lysozyme at pH 7.7.

Journal ArticleDOI
TL;DR: A novel S PME method using multiwalled carbon nanotubes (MWCNTs) as the SPME fiber coating for gas chromatography with electron-capture detection (GC-ECD) of PBDEs in environmental samples was successfully applied for the analysis of real samples including local river water, wastewater, and milk samples.

Journal ArticleDOI
TL;DR: A new multi-residue method using ultra-performance liquid chromatography (UPLC) quadrupole-time-of-flight mass spectrometry (Q-TOF-MS) was developed for screening and confirmation of 29 pharmaceutical compounds belonging to different therapeutical classes.

Journal ArticleDOI
TL;DR: It is found that UPLC conditions hold advantages in terms of speed of analysis, for required theoretical plate counts up to approximately 80,000 and practical maximum efficiency.

Journal ArticleDOI
TL;DR: This review, centred on publications that appeared during the last five years, is resuming different approaches which can be used for fibre production and further summarises alternative techniques closely related to SPME, such as in-tube extraction or single-drop microextraction (SDME).

Journal ArticleDOI
TL;DR: The efficacy of ethanol-water mixtures to extract OBPs from olive leaves has been demonstrated and compared with that of a conventional method which requires 24h for complete extraction; so these mixtures can substitute toxic extractants used to date.

Journal ArticleDOI
TL;DR: Counter-current chromatography is a very versatile separation technique which does not require a solid stationary phase and is complementary to other chromatographic methods and is compatible with gradient systems.

Journal ArticleDOI
TL;DR: The major advantages of UPLC, using 1.7 microm particles, over HPLC are the speed of analysis, the narrower peaks (giving increased signal-to-noise ratio) and improved confirmation for the targeted pesticides in the analyses of baby foods.

Journal ArticleDOI
TL;DR: The excellent antioxidant activity of the crude fresh rosemary extracts was pointed, which was almost identical to that of pure delta-tocopherol, and higher than that of BHT; extracts prepared from distilled rosemary showed the lowest activity, although they are of interest due to the low cost of the raw material.

Journal ArticleDOI
C. Díez, W.A. Traag1, P. Zommer1, P. Marinero, J. Atienza 
TL;DR: QuEChERS method was compared with known conventional multi-residue extraction procedures and resulted to be the most universal extraction method by providing a well-defined phase separation without dilution and achieving acceptable recoveries in average including the extraction of the always difficult acidic herbicides.

Journal ArticleDOI
TL;DR: A rapid and simple method for simultaneous analysis of four neonicotinoid insecticides including acetamiprid, imidacloprid, thiacloprid and thiamethoxam in fruit and vegetable matrices has been developed and could be utilized for monitoring of pesticides residues.

Journal ArticleDOI
TL;DR: Ultra-performance liquid chromatography is investigated as an alternative to HPLC for the analysis of pharmaceutical development compounds and results from precision and comparative studies indicate that UPLC is a suitable technique for routine pharmaceutical analysis.

Journal ArticleDOI
TL;DR: A robust procedure for the determination of 16 US EPA PAHs in both aqueous and solid samples from the WWTP of Fusina (Venice, Italy) is presented.

Journal ArticleDOI
TL;DR: A sensitive and reliable method using liquid chromatography-electrospray tandem mass spectrometry has been developed and validated for the trace determination of beta-lactam antibiotics in natural and wastewater matrices as discussed by the authors.

Journal ArticleDOI
TL;DR: An accurate method was developed for the simultaneous determination of water-Tartrazine, Amaranth, Ponceau 4R, Sunset Yellow FCF, and fat-Sudan (I-IV), synthetic soluble colorants in foodstuff.

Journal ArticleDOI
TL;DR: Twenty different basic drugs were electrokinetically extracted across a thin artificial organic liquid membrane with a 300 V d.c. electrical potential difference as the driving force, resulting in permeation of the interface.

Journal ArticleDOI
TL;DR: Surfactant assisted PHWE was found to enhance the extraction of thermally labile and more hydrophobic species in medicinal plants at a lower temperature and the addition of small amount of surfactants in PHWE is highly suited for the determination of bioactive or marker compounds in medicinal Plants.