Showing papers in "Talanta in 2008"

TL;DR: A review about the application of response surface methodology (RSM) in the optimization of analytical methods is presented and the theoretical principles and steps for its application are described to introduce readers to this multivariate statistical technique.

TL;DR: This review covers the main DNA immobilization techniques reported so far, new micro- and nanotechnological platforms for biosensing and the transduction mechanisms in genosensors, and its implications for the future of molecular diagnosis are argued.

TL;DR: The aim of this mini-review is to illustrate the main analytical applications of Raman Spectroscopy-especially SERS spectroscopy, and mainly focus on the applications developed within the period from 2004 up to now.

TL;DR: The bismuth-modified carbon nanotube electrode was successfully applicable to analysis of trace metals in real environments and presented well-defined, reproducible and sharp stripping signals.

TL;DR: The present preconcentration and determination method was successfully applied to the analysis of synthetic metal mixture solution and river water samples and the extraction behavior of the matrix was conformed with Langmuir's equation.

TL;DR: A review on analytical methods used to evaluate biodiesel quality was written by Knothe as discussed by the authors, and a review of the available techniques and some improvements on the analytical methods for biodiesel characterization can be found in this paper.

TL;DR: Forty synthetic food colors were determined in drinks and candies by reversed-phase high-performance liquid chromatography with photodiode array detection by reversing the phases of detection and quantitation and the recoveries ranged from 76.6 to 115.0%.

TL;DR: Key research challenges to be addressed to deliver future, remote, wireless, chemo-biosensing systems include the development of low cost, low-power sensors, miniaturised fluidic transport systems, anti-bio-fouling sensor surfaces, sensor calibration, reliable and robust system packaging, as well as associated energy delivery systems and energy budget management.

TL;DR: Application of multivariate curve resolution alternating least squares (MCR-ALS), for the resolution and quantification of different analytes in different type of pharmaceutical and agricultural samples is shown and results obtained are compared to the well established partial least squares regression (PLSR) multivariate calibration method.

TL;DR: In this article, the fabrication and performance of a sensor for ammonia gas analysis which has been constructed via the inkjet-printed deposition of polyaniline nanoparticle films was described.

TL;DR: The mode of partitioning of uranyl ion between nitrate-containing aqueous phases and various N,N'-dialkylimidazolium-based room-temperature ionic liquids (RTILs) in the presence of tri-n-butyl phosphate is shown to change from an ion-exchange process to one involving extraction of a neutral uranyl-TBP-nitrato complex as the aqueously nitrate concentration is increased.

TL;DR: The proposed method was also used to estimate these compounds in human blood plasma and urine samples and the method was validated using HPLC.

TL;DR: The method developed has been employed for the quantification of the various capsaicinoids present in different varieties of hot peppers cultivated in Spain and the repeatability and reproducibility of the method have been determined.

TL;DR: This review summarizes and discusses the research carried out on the determination of antimony and its predominant chemical species in atmospheric aerosols over the last decade to identify the future needs and trends.

TL;DR: This method, which combines an on-line SPE with analyte peak focusing feature and the selective atmospheric pressure photoionization MS detection, resulted in limits of detection ranging from 0.1 to 0.5 ng/mL for most of the analytes, confirming that analytically it is possible to measure simultaneously these phenols and parabens with the precision and accuracy at sub-parts-per-billion levels required for biomonitoring.

TL;DR: The results demonstrated that the SPE-LC-MS/MS method developed is highly effective for analyzing trace amounts of the three phytohormones in plant samples.

TL;DR: Results show that the NiO hollow nanospheres are a promising material to construct enzyme biosensors.

TL;DR: With a view to analyse multiresidues of pesticides in soil samples, a new ultrasonic solvent extraction was compared to the European Norm DIN 12393 for foodstuff, and the QuECheRS method was the most efficient extraction method.

TL;DR: This paper describes a fully automated online method for solid-phase extraction coupled with liquid chromatography and tandem mass spectrometry using atmospheric pressure ionization to simultaneously detect selected dissolved natural and synthetic hormones at concentrations as low as 5 ng/L from aqueous matrices.

TL;DR: It is demonstrated that bacterial cell concentration can be inferred by measuring the impedance of cell suspensions in DI water, which could be an alternative to current impedance methods that have been reported for the detection of bacterial cells, e.g. impedance microbiology and electrical/electrochemical impedance biosensors.

TL;DR: The benefit of the Phen method in the routine analysis of antioxidant capacities of vegetable oils is demonstrated and a linear and significant correlation between these two analytical methods is demonstrated.

TL;DR: An appropriate retention equation was established by using eight nucleosides as model analytes and by comparing four retention models on six different HILIC columns to predict retention times of the real Traditional Chinese Medicine-Carthaus tinctorius L. sample.

TL;DR: In this paper, a new analytical method for the simultaneous determination of 90 pesticides in fruit juices by ultra performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) has been developed and validated Extraction was performed with acetonitrile, applying QuEChERS methodology, and the extracts were analyzed without any further clean-up step.

TL;DR: The main DLLME advantages combined with ET AAS were simplicity of operation, rapidity, low cost, high-enrichment factor, good repeatability, low consumption of extraction solvent, requiring a low sample volume and the co-precipitation.

TL;DR: The results showed that the biosensor provided the high synergistic electrocatalytic action, and exhibited good reproducibility, long-term stability, and good recovery in human serum sample.

TL;DR: A highly sensitive and selective cyanide chemosensor based on fused indoline and benzooxazine fragment was reported with fast response and should have potential application in a variety of settings requiring rapid and accurate analysis of cyanide anion for drinking and fresh water.

TL;DR: The proposed method was used to detect acetaminophen in commercial drugs and the obtained results are satisfactory.

TL;DR: An amperometric biosensor based on horseradish peroxidase (HRP) and carbon nanotube (CNT)/polypyrrole (PPy) nanobiocomposite film on a gold surface has been developed and CNTs was shown to enhance the electron transfer as a mediator and capable to carry higher bioactivity owing to its intensified surface area.

TL;DR: Two novel chromatographic methods both based on utilization of sub-2-micron particle columns were developed for the analysis of phenolic compounds and were applied in theAnalysis of real samples (grape wines, teas).

TL;DR: The proposed method had been applied to determining the five phthalates in four environmental water samples and concentration factor of 600 was achieved easily and recovery results with relative standard deviation (R.S.D.) of below 6% were achieved.