Showing papers in "Talanta in 2014"

TL;DR: A review about the application of response surface methodology (RSM) when several responses have to be simultaneously optimized in the field of analytical methods development is presented.

TL;DR: The main objective of this article is to review the chemometric methods used in analytical chemistry to determine the elution sequence, classify various data sets, assess peak purity and estimate the number of chemical components.

TL;DR: The possible use of novel, non-toxic extracting agents, inter alia, ionic liquids, coacervates, surfactant solutions and reverse micelles in the liquid phase microextraction techniques has been evaluated in depth.

TL;DR: A colorimetric mixed-pH dye-based indicator with potential for the development of intelligent packaging, as a "chemical barcode" for real-time monitoring of skinless chicken breast spoilage, is described in this article.

TL;DR: The cytotoxicity study revealed that the C-dots did not cause any toxicity to cells at a concentration as high as 20 mg/mL, which suggested that theC-d dots present in commercial coffee may have more potential biological applications.

TL;DR: The proposed method has been successfully applied for the determination of trace metals in real environmental water samples with recoveries ranging from 85 to 119%, and was validated by the analysis of Certified Reference Material of GSBZ 50009-88 environmental water.

TL;DR: The paper is devoted to the evaluation of limit of detection (LOD) and limit of quantification (LOQ) values in concentration domain by using 4 different approaches; namely 3σ and 10σ approaches, ULA2 approach, PBA approach and MDL approach.

TL;DR: The present review summarizes and discusses the theory behind SBSE and the most recent developments concerning its effectiveness and the main results of recent analytical approaches and their applications, published in the last three years.

TL;DR: The aim of this study was to optimize the antioxidant activity of Piper nigrum L. essential oil extracted using the supercritical carbon dioxide technique, and the results showed that the best antioxidant activity was achieved at 30 MPa, 40 °C and 40 min.

TL;DR: The developed MPANI-GO MSPE-ICP-MS method has the advantages of simplicity, rapidity, high sensitivity, high enrichment factor and is suitable for the analysis of trace REEs in samples with complex matrix.

TL;DR: Ni(OH)2/ERGO-MWNT nanocomposites thus easily prepared through a green electrochemical method are promising electrode materials for biosensing and good recoveries of analytes in real samples like urine and milk confirm the reliability of the prepared sensor in practical applications.

TL;DR: Practical SERS substrates based on deposition of silver nanoparticles on commercially available low-cost filter paper were prepared by simple silver mirror reaction in a large scale, and utilized for rapid, portable and accurate identification and detection of pesticide residues at various peels.

TL;DR: Compared with other nanomaterials-based peroxidase mimetics, PB NPs provides 10-100 times higher sensitivity toward the detection of H2O2 and glucose, and showed great potential applications in varieties of physiological importance substances when merged with appropriate H 2O2-producing oxidases.

TL;DR: If compared with samples of other crops, the analyses of blackcurrants revealed a high percentage of exceedance of the legislative maximum residue levels (MRLs), as well as some instances of the detection of pesticides unapproved on this crop.

TL;DR: The reported method can be effectively used for the quantification of total Hg(2+) in samples, wherein the organic mercury is first oxidized to inorganic form by ultraviolet (UV) irradiation.

TL;DR: This work examines the main features of modern electronic noses and their most important applications in the environmental, and security fields and describes the main components of an electronic nose.

TL;DR: A facile assay method for the highly sensitive and selective sensing of biothiols based on graphene quantum dots (GQDs) has been developed and it was observed that mercury(II) ions could efficiently bind and quench the fluorescence of the GQDs.

TL;DR: A highly selective amperometric sensor was developed for the trace level determination of hydrazine at bismuth nanoparticles (Bi) decorated graphene nanosheets (GR) composite film modified glassy carbon electrode (GCE) and exhibited appreciable stability, repeatability and reproducibility results.

TL;DR: A new optical microfiber biosensor using gold nanoparticles (GNPs) as amplification labels for the detection of alpha-fetoprotein (AFP) in serum samples is reported, which might make this biosensor a promising platform for clinical cancer diagnosis and prognosis.

TL;DR: An aptamer-based quartz crystal microbalance (QCM) biosensor was developed for the selective and sensitive detection of leukemia cells, and both the QCM and fluorescence microscopy results manifested the selectivity of the sensor designed.

TL;DR: The proposed DSLLME method has been successfully applied to the determination of inorganic arsenic in different environmental water samples and certified reference material.

TL;DR: A gold nanoparticle-based colorimetric aptasensor for Staphylococcus aureus using tyramine signal amplification (TSA) technology has been developed and the limit of the developed method was determined to be 9 cfu mL(-1).

TL;DR: Under the optimal conditions, MWCNs/MGF/GCE can simultaneously detect AA, DA, UA and TRP with high selectivity and sensitivity.

TL;DR: This paper is an attempt to collect and summarize the principal approaches to the definition and calculation of detection and quantification abilities published from the beginning of 20th century up until the present and to popularize the knowledge of metrology in chemistry, particularly that part of it which concerns validation of the analytical procedure.

TL;DR: A new method for the visual and spectrophotometric detection of chemical species using copper nanoparticles (Cu NPs) that provides good selectivity for detecting S(2-) without the need for complex readout equipment is introduced.

TL;DR: A simple, cheap and fast analytical procedure to perform arsenic determination using functionalized gold nanoparticles (AuNPs) and VIS spectrometry as a detection technique is studied.

TL;DR: High throughput method for reliable detection and quantification of 56 Fusarium, Alternaria, Penicillium, Aspergillus and Claviceps mycotoxins in a wide range of animal feed samples represented by cereals, complex compound feeds, extracted oilcakes, fermented silages, malt sprouts or dried distillers' grains with solubles.

TL;DR: A novel, simple and efficient protocol for the synthesis of copper nanoparticles in aqueous solution using L-cysteine as capping or protecting agent and the developed sensor has a high potential for rapid and on-site detection of Hg(2+) ions is demonstrated.

TL;DR: An electrochemical method based on the adsorptive stripping differential pulse voltammetry (AdSDPV) employing Gr/AuNP/NAF/GCE employing SUM has been proposed for the subnanomolar determination of SUM and the results are in agreement at the 95% confidence level.

TL;DR: This review outlines recently analytical methods available to determine and quantify these plasticizers in several matrices, allowing the evaluation of potential risk and so risk management.