Showing papers in "Analytica Chimica Acta in 2009"

TL;DR: This study shows that better prediction is obtained by CARS when compared to full spectrum PLS modeling, Monte Carlo uninformative variable elimination (MC-UVE), moving window partial least squares regression (MWPLSR).

TL;DR: This review manuscript discusses sample pre-treatment methods such as liquid-liquid extraction, supercritical fluid extraction, solid phase extraction, and others such as ELISA and further currents trends, advantages and disadvantages and future prospects of these methods have been discussed.

TL;DR: This paper will focus on the mental attitude required by experimental design, and show the real advantages in terms of reduced experimental effort and of increased quality of information that can be obtained if this approach is followed.

TL;DR: The results imply that humans could be substantially impacting iron and bioavailable iron deposition to ocean regions, but there are large uncertainties in the authors' understanding.

TL;DR: This review focuses on the different technical approaches presented to enable trapping of particles and cells in microfluidic system.

TL;DR: Applications described include process monitoring, shelf-life investigation, freshness evaluation, authenticity assessment, as well as other general aspects of the utilization of electronic noses in food control.

TL;DR: UHPLC has recently become a wide-spread analytical technique in many laboratories which focus on fast and sensitive bio-analytical assays and the key advantages are the increased speed of analysis, higher separation efficiency and resolution, higher sensitivity and much lower solvent consumption as compared to other analytical approaches.

TL;DR: It is found that the prepared Nafion-G composite film not only exhibited improved sensitivity for the metal ion detections, but also alleviated the interferences due to the synergistic effect of graphene nanosheets and Nafions.

TL;DR: This review focuses on selected examples to illustrate novel concepts and promising applications of fabricated nanoparticles for biosensing, assay labelling, bioimaging, and in research on a variety of molecular tags in cellular and molecular biology.

TL;DR: This work focuses on continuous-flow microfluidic PCR on-chip, which can be readily implemented as an integrated function of a micro-total-analysis system and offers great potential for single DNA molecule and single-cell amplification.

TL;DR: Methods and advances for monitoring neurotransmitters in vivo or for tissue analysis of neurotransMITters over the last five years are reviewed and advances in application to catecholamines, indoleamines, and amino acids have been prominent.

TL;DR: A novel rapid multiresidue/multiclass procedure with liquid chromatography tandem mass spectrometry (LC-MS/MS) detection has been developed to screen for the presence of veterinary drug residues in animal tissues.

TL;DR: Data from a comparison study on Mn oxide-related compounds with different crystallographic forms represent a clear signature for identifying beta-MnO(2) and alpha-MmO( 2) type materials via RS spectroscopy.

TL;DR: An overview of applications of (129)I speciation in various scientific disciplines such as radiation protection, waste depository, and environmental sciences is given and measurement techniques for the determination of ( 129)I are presented and compared.

TL;DR: The various analytical methods of biomass pyrolysis/gasification processing are discussed, including reactor types, analytical tools, and recent examples in the areas of compositional analysis, structural analysis, reaction mechanisms, and kinetic studies on biomass thermochemical processing.

TL;DR: The results obtained for copper determination in these samples agreed with those achieved by graphite furnace atomic absorption spectrometry (GFAAS) at the 95% confidence level.

TL;DR: An overview of analytical methodologies for the determination of quinolone and fluoroquinolone (FQs), macrolide (MLs), tetracycline (TCs), sulfonamide (SAs) antibiotics and trimethoprim (TMP) in different environmental waters is presented.

TL;DR: This review critically evaluated the state-of-the art of selenium speciation in biological matrices mainly focused in nutritional and food products and highlighted how particular attention is paid in the development of Se-enriched food and nutritional products and how the application of the techniques mentioned above is mandatory to get reliable results on seenium metabolisms in these particular matrices.

TL;DR: A new dispersive liquid-liquid microextraction based on solidification of floating organic droplet method (DLLME-SFO) was developed for the determination of five kinds of polycyclic aromatic hydrocarbons (PAHs) in environmental water samples and was successfully applied to determinate PAHs.

TL;DR: The theoretical aspects of LC x LC are discussed together with practical considerations forLC x LC method development, and an extensive overview of different interface designs discussing their pros and cons is presented.

TL;DR: It was found that elevated free fatty acids were essential pathophysiological factors in diabetes mellitus which reflected either the hyperglycemia or the deregulation of fatty acids metabolism.

TL;DR: Using DART-TOFMS, not only differentiation among extra virgin olive oil, olive pomace oil (OPO) and olive oil (OO) could be easily achieved, but also EVOO adulteration with commonly used adulterant, hazelnut oil (HO), was feasible.

TL;DR: This review covers the analytical properties and applications of micro- and nanostructured molecularly imprinted polymers, mainly focusing on their sensor and microarray applications of 2-3D patterned MIP structures.

TL;DR: Solid phase extraction (SPE) and ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) were utilized to develop a rapid, sensitive and reliable method for trace analysis of 21 antibiotics belonging to 7 classes in influent and effluent of municipal wastewater treatment plant in Hong Kong.

TL;DR: An overview of microdialysis sampling and online analysis systems with emphasis on in vivo analysis is provided.

TL;DR: A large database of experimental retention factors and partition coefficients is constructed after first applying selection tools to remove unreliable experimental values and an optimized collection of varied compounds with descriptor values suitable for calibrating chromatographic systems is presented.

TL;DR: The proposed method was applied to the analysis of four different sources water samples and the relative recoveries of spiked water samples are 99.9-115.7% and 87.3-117.6% at three different concentration levels of 75, 200 and 1000 microg L(-1), respectively.

TL;DR: Several polar compounds related to arginine and proline metabolism, alanine and aspartate metabolism, lysine degradation, nicotinate and nicotinamide metabolism were found to be significantly changed in the concentrations of the two different populations: healthy and cancer.

TL;DR: The more recent developments in trace elements speciation are reviewed focusing on methods for labile and free metal determination.

TL;DR: An original electrochemical sensor based on molecularly imprinted conducting polymer (MICP) is developed, which enables the recognition of a small pesticide target molecule, atrazine, and the recognition can be quantitatively analyzed by the variation of the cyclic voltammogram of MICP.