Showing papers in "Analytica Chimica Acta in 2019"

TL;DR: An updated overview of the most recent developments and applications of QuEChERS beyond its original application to pesticides, mycotoxins, veterinary drugs and pharmaceuticals, forensic analysis, drugs of abuse and environmental contaminants is proposed.

TL;DR: A review on the NP-based ratiometric fluorescent sensors has been presented to meticulously elucidate their development, advances and challenges.

TL;DR: An end-to-end deep learning approach incorporated Inception module, named DeepSpectra, is presented to learn patterns from raw data to improve the model performance and shows improved results than conventional linear and nonlinear calibration approaches in most scenarios.

TL;DR: This review summaries the recently developed E-aptasensors for detection of analytes related to food and water safety, including bacteria, mycotoxins, algal toxins, viruses, drugs, pesticides, and metal ions.

TL;DR: A blend of rutheniumdoped TiO2 (Ru-TiO2) nanoparticles and multiwalled carbon nanotubes (MWCNTs) loaded into carbon paste matrix to fabricate a novel Ru-Ti O2/MWC NTs-CPE sensor was used for the detection and quantification of flufenamic acid (FFA) and mefenamic Acid (MFA) drugs.

TL;DR: The traditional synthesis methods of carbon dots (CDs) have some disadvantages of complicated operation and a large amount of energy consumption, so yellow-green luminescent CDs are synthesized at room temperature according to the principle of amine-aldehyde condensation to address these limitations.

TL;DR: This review summarizes progress in electroanalysis of organic compounds and biomacromolecules by means of bare BDD-based electrodes for the period of 2009-2018 with focus on possibilities in detection of amino acids, peptides and proteins, nucleobases, nucleos(t)ides and DNA/RNA.

TL;DR: This review highlights recent progress that has been made in the development of nanoparticle-based assays and focuses on the analytical potential of nanomaterials, including up-conversion nanoparticles (UCNPs), metal-organic frameworks (MOFs) and Nanomaterial-functional DNA intelligent hydrogels, as well as hybrid nanostructures.

TL;DR: This work offers a new solution for chemometrics toward resolving challenges related to spectral data with rapidly increased sample numbers from various sources and provides a practical guide to the development of a deep convolutional neural network-based analytical workflow.

TL;DR: The SERS strategy could be used to detect a broad range of bacteria by using different aptamers, moreover, the simple operation and precise quantification ability empower this assay great potential in the application of food safety and infectious disease point-of-care diagnosis.

TL;DR: Given its low cost, compact size, and excellent analytical performance, the proposed smartphone-based fluorescent LFIA platform holds considerable potential in rapid and accurate point-of-care detection of ZIKV NS1 and provides new insight into the design and application of molecular diagnostic methods in low-resource settings.

TL;DR: Raman can identify and visualise microplastics from a soil/sand background, with almost no sample preparation, no dye, no destruction of the sample and no interference from water/organic matter/fluorescence background signals as well.

TL;DR: Fluorescent carbon quantum dots synthesized via facile one-step hydrothermal treatment of mustard seeds showed excellent optical property and showed its potential towards the selective and sensitive detection of ascorbic acid in the linear range of 10-70 μM having a correlation coefficient of 0.015 mM.

TL;DR: In view of the recent progress in understanding the molecular aspects of the extracellular electron transfer mechanisms of Enterococcus faecalis, the electron transfer properties of this bacterium are especially focused on.

TL;DR: In this tutorial, different aspects of VAMS approach are described and discussed, presenting the procedures adopted and the results obtained by those authors who have developed this kind of analytical workflow in the last few years.

TL;DR: It is shown how this preliminary step of data processing may lead, in many cases, to draw incongruous conclusions, not actually based on real information embodied within data, but on artefacts arising from the mathematical transforms.

TL;DR: It is argued that movement to paper-based SERS sensors will finally enable point-of-sample analytical chemistry applications and the expectations for the future are presented, including emerging ideas inspired by paper SERS.

TL;DR: This study introduces a new strategy for periodic stacking of positively charged NiAl layered double hydroxides (LDHs) nanosheets with negatively charged monolayers of graphene (G) by systematically optimizing several parameters in a controlled co-feeding fashion and resultant heterostacked NiAl LDH/G LBL nanocomposites have been practically applied in sensitive detection of dopamine released from live cells as early Parkinson's disease diagnostic tool.

TL;DR: This N, S co-doped CQDs fluorescent probe can be used to analyze extracellular fluids and wastewater samples satisfactorily and show a remarkable potential for broad applications in biological molecule determination and environmental analysis.

TL;DR: The feasibility of using aptameric DNA sequences, covalently conjugated to 4-aminothiophenol-gold nanoparticle complexes for the sensitive and highly specific detection of E. coli O157:H7 via surface enhanced Raman spectroscopy (SERS) analysis is presented.

TL;DR: A fully automated on-line system that includes extraction, chromatographic separation, and mass spectrometry in one-stage is presented as a novel way of determining PPCPs in sewage sludge.

TL;DR: The proposed immunoelectrode was validated with conventional ELISA for the detection of CEA in serum samples of cancer patients and resulted in improved electrochemical performance and signal stability.

TL;DR: In this review, recent developments and applications of SPME for the determination of endogenous substances over the past five years are summarized.

TL;DR: A review of some particular applications of EN and ET based instruments in pharmaceutical industry, including development prospects and a critical summary of the state of art in the field were surveyed.

TL;DR: This tutorial seeks to introduce the basic knowledge about lipidomics and to provide readers with some core ideas and the most important approaches for studying the field.

TL;DR: The results show that VCPA-GA andVCPA-IRIV significantly improve model's prediction performance when compared with other methods, indicating that the modified VCPA step is a very efficient way to filter the uninformative variables and VC PA-based hybrid strategy is a good and promising strategy for variable selection in NIR.

TL;DR: The electrochemical investigation showed that the PtNi@MoS2/GCE sensor performed good selectivity and wide linear ranges for the simultaneous detection of dopamine and uric acid and the detection limits were down to 0.1 μM (S/N = 3) for both analytes.

TL;DR: Successful applications suggest that the core-shell structured Fe3O4@COFs nanospheres could be used as a potential adsorbent for efficient extraction and analysis of trace SAs.

TL;DR: This review focuses on comprehensive summarizing of available literature data on the examples of ionic liquid-based hybrid materials implementation in selected analytical extraction techniques, namelySolid-phase extraction, solid-phase microextraction, hollow-fiber solid- phase micro Extraction, stir-bar sorptive extraction and biosensors.

TL;DR: This review aims to summarize the various ingredients and components of beer, discuss how they affect the finished product, and present some of the analytical methods used for quality control and understanding the formation of chemicals in beer during the brewing process.