Showing papers in "Analytica Chimica Acta in 2015"

TL;DR: This tutorial review aims to provide an introductory overview to several straightforward statistical methods such as principal component-discriminant function analysis (PC-DFA), support vector machines (SVM) and random forests (RF), which could very easily be used either to augment PLS or as alternative supervised learning methods to PLS-DA.

TL;DR: This review provides a general overview of data fusion strategies that have been used in the field of food and beverage authentication and quality assessment.

TL;DR: This review compares different carbon nanomaterial strategies for creating electrochemical sensors for biomolecules and addresses enzyme-based electrodes that are used to detect non-electroactive species such as glucose, alcohols, and proteins.

TL;DR: This paper is a review of the recent progress on gas sensors using graphene oxide (GO), and several applications of GO based sensors are summarized for detection of water vapor, NO2,H2, NH3, H2S, and organic vapors.

TL;DR: A new LC-MS/MS method is provided for precise and accurate quantitation of SCFAs in human feces to understand the complex interplay between diet, gut microbiota and host metabolism homeostasis.

TL;DR: It is described here that the specific combination of phenazine/triphenylmethane polymers with CNT leads to an improved performance of the resulting sensing devices, because of their complementary electrical, electrochemical and mechanical properties, and also due to synergistic effects.

TL;DR: The as-synthesized N-CDs have been successfully applied for cell imaging and detecting Fe(3+) in biosystem and are employed as a highly sensitive and selective probe for Fe( 3+) detection.

TL;DR: The use of magnetic carbon nanotubes (M-CNTs) as a sorption substrate in M-SPE has become an active area of research and these materials have exceptional mechanical, electrical, optical and magnetic properties and they also have an extremely large surface area and varied possibilities for functionalization.

TL;DR: This is the part II of a tutorial review intending to give an overview of the state of the art of method validation in liquid chromatography mass spectrometry and discuss specific issues that arise with MS (and MS-MS) detection in LC (as opposed to the "conventional" detectors).

TL;DR: The prospects of SERS becoming a major tool for convenient in-situ threat identification and existing SERS detection methods and substrates are discussed, with particular focus on ultra-sensitive real-time detection.

TL;DR: A variety of published applications relying on the use of ICP-MS/MS are described, to illustrate the added value of tandem mass spectrometry in (ultra)trace analysis.

TL;DR: The G/PANI-modified electrode exhibited high electrochemical conductivity, producing a three-fold increase in anodic peak current and evidence of increased surface area under SEM, and repeat assays on the same device demonstrated good reproducibility.

TL;DR: This review aims to rationalise the findings of the many 'optimised' molybdenum blue methods in the literature in terms of the underlying polyoxometallate chemistry and offers suggestions for the further enhancement of this time-honoured analytical reaction.

TL;DR: An industrial chemical framework is focused on to explain, in a step-wise manner, how to develop a classification methodology to differentiate between several types of plastics by using Near infrared hyperspectral imaging and Partial Least Squares - Discriminant Analysis.

TL;DR: The experimental results showed that the stable N-GQDs could be used for the detection of H2O2 and glucose over a wide range of pH and temperature, offering a simple, highly selective and sensitive approach for their colorimetric sensing.

TL;DR: This tutorial focuses on validation both from a numerical and conceptual point of view, and examples of how one data set can be validated across this background information illustrate that it will affect the figures of merits as well as the dimensionality of the models.

TL;DR: A review of recent developments in analytical methods for measurements of cytokine proteins is provided and methods used for elucidating the release of cytokines from single cells as well as in vivo collection methods are described.

TL;DR: The as-prepared C-Dots have good photostability and exhibit a high quantum yield and are successfully applied for the determination of Hg(2+) in real water samples.

TL;DR: Practical guidelines for reporting analytical calibration results are provided and pertinent subjects here included are the choice of algorithms, the estimation of analytical figures of merit, the use of non-linear models, the consideration of the model regression coefficients for variable selection, and the application of certain mathematical pre-processing procedures such as smoothing.

TL;DR: The evaluated method provides reliable screening, quantification, and identification of 115 veterinary drug and pharmaceutical residues in foods of animal origin and has been successfully applied in real samples.

TL;DR: This tutorial review covers computer vision-based analytical (CVAC) procedures and systems from 2005 to 2015, a period of time when 87.5% of the papers on this topic were published.

TL;DR: It turned out that the formation of DES-protein aggregates play a significant role in the separation process and suggest that ChCl-based DES-ATPS are supposed to have the potential to provide new possibilities in the extraction of proteins.

TL;DR: The general trend amongst the research papers allows concluding that the use of nanomaterials has already provided significant improvements in the analytical performance of many biosensors and that this research field will continue to grow.

TL;DR: It was found that the optimal N-CDs was successfully employed as good multicolor cell imaging probes due to its fine dispersion in water, excitation-dependent emission, excellent biocompatibility and low toxicity.

TL;DR: This review summarises traditional methods such as chromatographic and immunochemical techniques, as well as newer approaches such as biosensors, and optical techniques which are becoming more prevalent, which are being more prevalent in the field of mycotoxins.

TL;DR: The surface modification of graphene is critically discussed, the specific advantages that graphene-based materials can provide over other materials in sensor research and their related chemical and electrochemical properties are described.

TL;DR: Food fingerprinting approaches are expected to become a very potent tool in authentication processes aiming at a comprehensive characterization of complex food matrices, and critical steps of the fingerprinting workflow were explored to develop a generic scheme for multivariate model validation.

TL;DR: This assay presents a simple and sensitive aptamer based biosensor for rapid detection of Escherichia coli O157:H7 and shows that without DNA extraction, the reduced handling and simpler equipment requirement render this assay asimple and rapid alternative to conventional methods.

TL;DR: The capabilities and limitations of the chemical imaging methods that are currently at hand are reviewed, using a number of case studies, and an outlook on potential future developments for two-dimensional solute imaging in soils and sediments is provided.

TL;DR: Isothermal nucleic acid amplification techniques enable the detection of bioanalytes with much simplified protocols and with minimal sample preparations since the entire amplification processes are performed isothermally.