Showing papers in "Talanta in 2010"

TL;DR: An electrochemical sensor based on the electrocatalytic activity of functionalized graphene for sensitive detection of paracetamol is presented and shows great promise for simple, sensitive, and quantitative detection and screening of par acetamol.

TL;DR: A comprehensive review with 108 references referring to the distribution, source, accumulation, transformation, types and toxicity of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) is presented.

TL;DR: In this article, a new electrocatalyst, MnO2/graphene oxide hybrid nanostructure was successfully synthesized for the nonenzymatic detection of H2O2.

TL;DR: The proposed method was applied to the determination of target pollutants in real wastewater effluent samples using the standard addition method and the repeatability and reproducibility of the proposed method were found to be good.

TL;DR: Excellent electrocatalytic activity, large surface-to-volume ratio and efficient electron transport property of CuO nanoflowers electrode have enabled stable and highly sensitive performance for the non-enzymatic H(2)O( 2) sensor.

TL;DR: The results demonstrated that the CNFs modified carbon paste electrode (CNF-CPE) exhibited high electrocatalytic activity and good analytical performance towards the oxidation of the three amino acids, making it suitable for the determination of Trp, Tyr and Cys in clinical and medicine.

TL;DR: A novel, stable and highly sensitive non-enzymatic glucose (Glc) sensor was developed using vertically well-aligned multi-walled carbon nanotubes array (MWCNTs) incorporated with cupric oxide (CuO) nanoparticles, which exhibited high electrocatalytic activity, stability, fast response and good selectivity against common interfering species.

TL;DR: The present review pertains to various extraction and quantification procedures used world wide to analyze OPPs residues in various vegetables and fruits.

TL;DR: The present work describes the development of a fully automated method, based on on-line solid-phase extraction (SPE)-liquid chromatography-electrospray-tandem mass spectrometry (LC-MS-MS), for the determination of 74 pharmaceuticals in environmental waters (superficial water and groundwater) as well as sewage waters.

TL;DR: A new type of amperometric glucose biosensor based on silicon dioxide coated magnetic nanoparticle decorated multiwalled carbon nanotubes (Fe(3)O(4)@SiO(2)/MWNTs) on a glassy carbon electrode (GCE) has been developed indicating the potential applications in food industries.

TL;DR: In this paper, a colorimetric mixed pH dye-based indicator with potential for the development of intelligent packaging, as a "chemical barcode" for real-time monitoring of intermediate-moisture dessert spoilage, is described.

TL;DR: Results indicated that graphene and chitosan composite could be a friendly biocompatible interface for immobilizing biomolecules and keeping their native structure.

TL;DR: Compared with the regular MAE and conventional heat-reflux extraction (HRE), the proposed approach exhibited higher efficiency and shorter extraction time, which indicated ILMAE was an efficient, rapid and simple sample preparation technique.

TL;DR: The present study describes the development, validation and a practical application of a fully automated analytical method based on on-line solid-phase extraction-liquid chromatography-tandem mass spectrometry (SPE-LC-MS/MS) for the simultaneous determination of 19 sulfonamides, including one acetylated metabolite, in different water matrices.

TL;DR: The purpose of this work was to present a chromatographic methods to analyse synthetic food dyes and the following techniques has been described: thin-layer liquid chromatography (TLC), high performance thin- layer chromatography(HPTLC), traditional column chromatography, high performance liquid Chromatography (HPLC) and high performance ion chromatography.

TL;DR: The trueness of data obtained for deoxynivalenol and zearalenon in wheat/maize by DART-orbitrapMS was demonstrated by analysis of certified reference materials (CRMs).

TL;DR: A multi-element extraction scheme for high-precision elemental and isotopic analyses of Ca, Hf, Lu, Th and U in geological materials, using high-purity lithium metaborate (LiBO(2)) flux fusion that allows rapid digestion of even the most refractory materials is devised.

TL;DR: Tap water, sea water and mineral water samples were successfully analyzed for the existence of chlorophenols using the proposed method, based on surfactant assisted dispersive liquid-liquid microextraction followed by high performance liquid chromatography.

TL;DR: The results suggest that berberine might play a pivotal role in the treatment of type 2 diabetes through down-regulating the high level of free fatty acids and that comprehensive metabonomic measurements are potentially very useful for studying the mechanisms of action of traditional Chinese medicines.

TL;DR: The inner synergistic effect of bifunctional ionic liquid extractant (Bif-ILE) for solvent extraction is reported for the first time using [tricaprylmethylammonium][di-2-ethylhexylphosphinate] ([A336][P204]) as n extractant for Eu(III), which can be attributed to better stability and hydrophobicity of the complex formed by [A336].

TL;DR: The method proved to be selective, sensitive, and with good precision and recovery rates, presenting LOQ below the MRL admitted by Brazilian legislation.

TL;DR: A quaternary ammonium-based room temperature ionic liquid trioctylmethylammonium salicylate (TOMAS) has been studied as an extractant of transition metal ions in aqueous solutions and the effect of pH value on the recovery of metal ions has been investigated.

TL;DR: A novel method combining dispersive liquid-liquid microextraction (DLLME) and heart-cutting multidimensional gas chromatography coupled to mass spectrometry was developed for the determination of free and total BPA and bisphenol B in human urine samples.

TL;DR: The Pt/PFIL/GS nanocomposite might offer a good possibility for applying it to routine analysis of AA and DA in clinical use and the proposed sensor in real sample analysis was examined in human urine samples.

TL;DR: A new method for solid-phase extraction and preconcentration of trace amounts Hg(II) from environmental samples was developed by using sodium dodecyle sulphate-coated magnetite nanoparticles (SDS- coated Fe(3)O(4) NPs) as a new extractant, and the method has been applied successfully for the determination of Hg (II) in aqueous samples.

TL;DR: A new dispersive liquid-liquid microextraction (DLLME) method is presented on the basis of a safe organic solvent, octanol, which is lighter than water, that is used for the extraction and pre-concentration of some preservatives including methyl paraben (Mep), ethyl parabens (Etp) and propyl parABen (Prp) from different matrices.

TL;DR: The aim of the present review is to evaluate the environmental distribution, fate and chemical speciation of organotin compounds in the environment.

TL;DR: The p-ATD modified electrode separated the voltammetric signals of AA, DA, UA and XN with potential differences of 110, 152 and 392 mV between AA-DA, DA-UA and UA-XN, respectively and also enhanced their oxidation peak currents.

TL;DR: A rapid and high-throughput Folin-Ciocalteu (F-C) reducing capacity assay adapted to routine/screening analysis was developed and the reaction conditions of the classical time-consuming F-C assay were modified and the influence of alkali and F- C reagent concentration was evaluated using gallic acid as standard.

TL;DR: This review presents the electrochemical application of disposable screen-printed biosensors in the microbiology field and describes the use of microorganisms as biological sensing elements in the development of sensitive microbial biosensor for the analysis of different analytes of interest.