Showing papers in "Analytica Chimica Acta in 2013"

TL;DR: Based on the results the novel NADES may be expected as potential green solvents at room temperature in diverse fields of chemistry.

TL;DR: Cellular antioxidant activity (CAA) assays, activation of redox transcription factors, inhibition of oxidases or activation of antioxidant enzymes are reviewed and compared with the classical in vitro chemical-based assays for evaluation of antioxidant capacity of natural products.

TL;DR: All recent progress in the research of novel magnetic materials as sorbents for metal preconcentration and determination coupled with different detection systems as well as their implementation in sequential injection and microfluidic systems are provided.

TL;DR: This articles reviews recent advances, exploiting nanoparticle labels, in the sandwich-type immunosensors and immunoassays for detection of multivalent antigens/analytes with more than one eptiope due to the use of two matched antibodies.

TL;DR: The test sample sizes necessary to achieve reasonable precision in the validation of classifier training and testing are determined and it is found that 75-100 samples will usually be needed to test a good but not perfect classifier.

TL;DR: A broad overview on the applications of different carbon-based nanomaterials, including nanodiamonds, fullerenes, carbon nanotubes, graphene,carbon nanofibers, carbon Nanocones-disks and nanohorns, as well as their functionalized forms, in sample preparation is provided.

TL;DR: A critical review of the recently published works of multivariate curve resolution, dealing with improvements in preprocessing methods, multi-set data arrangements, tailored constraints, issues related to non-ideal noise structure and deviation to linearity are proposed.

TL;DR: In this review, this paper summarized the analytical detection techniques used in droplet systems and discussed the advantage and disadvantage of each technique through its application.

TL;DR: Taking into account the advantages of ultra-small size, good stability, and high biocompatibility in aqueous solutions, Cu NCs are expected to have potential applications in biotechnology and clinical diagnosis as enzymatic mimics.

TL;DR: The advances of NA SPR biosensor technology are discussed and its applications both in the research of molecular interactions involving NAs and for the field of bioanalytics in the areas of food safety, medical diagnosis and environmental monitoring are reviewed.

TL;DR: This work proposes an analytical procedure for sample treatment, applicable to polymers as well as to migration samples, and for NIAS identification, which comprises the determination of both volatile and non-volatile compounds.

TL;DR: The proposed methodology is proposed by combining the strengths of established data analysis strategies, i.e. multiple kernel learning and OPLS-DA to offer an efficient tool for the fusion of Omics data obtained from multiple sources to provide a more complete view of biological systems.

TL;DR: Recent analytical techniques and applications for the determination of POPs in environmental and biota samples are introduced, and the extraction, separation and instrumental analyses of the halogenated POPs are summarized.

TL;DR: A multi-class, multi-residue method for the analysis of 13 novel flame retardants, 18 representative pesticides, 14 polychlorinated biphenyl (PCB) congeners, 16 polycyclic aromatic hydrocarbons, and 7 polybrominated diphenyl ether (PBDE) congener in catfish muscle was developed and evaluated using fast low pressure gas chromatography triple quadrupole tandem mass spectrometry (LP-GC/MS-MS).

TL;DR: Results demonstrate that the ePAD glucose assay was not significantly different from the spectrophotometric method (p=0.376, paired sample t-test, n=10).

TL;DR: A critical review of recent results in the field and deficiencies and precautions of the three NMR techniques used for the analysis of olive oil will be discussed in critical way.

TL;DR: It is discovered that the Co3O4/rGO nanocomposites possess intrinsic peroxidase- like activity and catalase-like activity, and could catalytically oxidize 3,3',5,5'-tetramethylbenzidine (TMB) by hydrogen peroxide (H2O2) to produce a intensified colour reaction.

TL;DR: The first simultaneous method for the determination of these three isotope systems in seawater is presented, using Nobias PA-1 chelating resin to extract metals from seawater, purification by anion exchange chromatography, and analysis by double spike MC-ICPMS.

TL;DR: This review covers a general overview regarding the recent progress and new applications of CPs toward their synthesis and use in novel extraction and micro Extraction techniques including solid phase microextraction (SPME), electrochemically controlled solid-phase microext extraction (EC-SPME) and other relevant techniques.

TL;DR: A new class of irregular-shaped platinum nanoparticles (ISPtNP), suitable for use in a mass production of miniaturized lab-on-a-chip devices and open new opportunities for protein diagnostics and biosecurity, is synthesized.

TL;DR: The most important aspects that ought to be considered during collection, treatment and storage of fluid and tissue samples intended for catecholamine analysis are underlined, the chromatographic conditions are compared and the technical advantages and limitations of each detection system are discussed.

TL;DR: The sample preparation proved to be suitable for both techniques and for a wide variety of substances with different polarity, Mutual confirmation and evidence of co-occurrence of several other organic contaminants were the main advantages of the combination of both techniques.

TL;DR: Different (dis)similarity approaches, such as (dis).similarity metrics or exploratory analysis approaches applied on herbal medicinal fingerprints, are discussed and illustrated with several case studies.

TL;DR: The analytical techniques and methods for determination of non-volatile compounds as potential markers of oxidative stress and lung inflammation are scrutinized with an emphasis on method suitability, sensitivity and appropriateness.

TL;DR: The developed method was applied to determine the amount of the target OPFRs in biological samples that were collected from the Pearl River Delta (PRD) region in southern China, and was dominated by TnBP, TCEP and TBEP.

TL;DR: Hemparin plasma or serum should be the order of best choice for LC-ESI/MS-based metabolomics research and Citrate and EDTA should be avoided since interferences and serious matrix effects were encountered on some co-eluting polar metabolites.

TL;DR: A novel method based on target-induced fluorescence quenching of glutathione-stabilized gold nanoclusters, with its simplicity, low cost, high selectivity and sensitivity, could be used as a promising tool for chromium analysis in environmental water samples.

TL;DR: A unified method for the simultaneous estimation of the principal biological components, proteins, carbohydrates, lipids, chlorophyll and carotenoids, in a single microalgae culture sample that incorporates the earlier published lipid assay is proposed.

TL;DR: An overview of analytical procedures reported for measurement of bio-accessible trace metal fractions in APM is given and the analytical techniques applied for accurate determination of dissolved trace metals in the presence of complex sample matrix are presented.

TL;DR: The cysteine equivalent thiol content (CETC) values of various biothiols using the DTNB-Au-NP assay were comparable to those of the conventional DTNB assay, showing that the immobilized DTNB reagent retained its reactivity toward thiols.