Showing papers in "Talanta in 2016"

TL;DR: AChE biosensors could become competitive for multi-analyte screening and soon be used for the development of portable instrumentation for rapid toxicity testing of samples and the recent works done to improve the analytical performance, sensitivity and selectivity will be discussed.

TL;DR: This work reviews on nanostructure based enzymatic and nonenzymatic glucose sensing approaches, and focuses on biocompatibility and toxicity of nanomaterials as well as provides a critical opinion and discussions about misconceptions in glucose sensors.

TL;DR: A simple, inexpensive and sensitive ultrasonic-assisted liquid-liquid microextraction method based on deep eutectic solvent (UALLME-DES) was used for the extraction of three phenolic acids from vegetable oils and successfully applied to the determination of target analytes in olive, almond, sesame and cinnamon oil samples.

TL;DR: Results indicated that betaine-based deep eutectic solvent aqueous two-phase systems (DES-ATPS) may provide a potential substitute new method for the separation of proteins.

TL;DR: This study discusses a novel and simple method for the preparation of magnetic dummy molecularly imprinted nanoparticles (MDMINPs) constructed via the sol-gel strategy using APTMS as the functional monomer.

TL;DR: A novel, selective and eco-friendly sensor for the detection of tetracycline was developed by grafting imprinted polymers onto the surface of carbon quantum dots by a simple microwave-assisted approach, revealing the advantages of simplicity, sensitivity, selectivity and low cost.

TL;DR: This review summarizes the design and the working principles of electrochemical sensors based on SPEs applied to the quantification of pharmaceutical and biological compounds.

TL;DR: An analytical assessment of an iron oxide (Fe2O3)/graphene (G) nanocomposite electrode used in combination with in situ plated bismuth (Bi) working as an electrochemical sensor for the determination of trace Zn, Cd, and Pb(2+).

TL;DR: This work constructed a fluorescence system (CDs/AgNPs) for determination of glyphosate and has been successfully used for glyphosate detection in the cereal samples with satisfactory results.

TL;DR: Under optimal conditions, the sensors fabricated for simultaneous determination of dopamine, acetaminophen and tryptophan using square wave voltammetry displayed high sensitivity, excellent stability and satisfactory results in real samples analysis.

TL;DR: The developed MOFs based MSPE coupled with HPLC method proved to be a convenient, rapid and eco-friendly alternative to the sensitive determination of pyrazole/pyrrole pesticides with high repeatability and excellent practical applicability.

TL;DR: The results showed that the immunosensor was capable of specifically detecting E. coli O157:H7 and S. Typhimurium within the range of 10(2)-10(6) cfu ml(-1) in the pure culture samples.

TL;DR: GQDs possess lower cellular toxicity and high photostability and can be directly used as fluorescent probes for cell imaging and are also sensitive to the pH value in the range from 2 to 12 indicating a great potential as optical pH sensors.

TL;DR: This work proposes for the first time a simple and novel approach based on SERS and As (III) -aptamer for detection of As ( III) with excellent selectivity and sensitivity and was demonstrated in monitoring As (II) in lake water samples with satisfactory results.

TL;DR: This review presents and discusses recent studies dealing with pesticide determination in honey, focusing on sample preparation and separation/detection methods as well as application of the developed methods worldwide.

TL;DR: Interestingly, NCDs-Hg(2+) system can be conveniently employed as a fluorescent "turn-on" sensor for highly selective and sensitive detection of L-Cys with a low LOD of 0.79 nM and a wide linear detection range of 0-50 μM.

TL;DR: The chromium concentration in DES rich phase (extraction phase) was determined by using microsample injection flame atomic absorption spectrometer (FAAS) and the detection limit (LOD), the quantification limit (LOQ), preconcentration factor and relative standard deviation were found as 5.5µgL(-1), 20 and 6%, respectively.

TL;DR: This review examines the progress made in electrochemical sensors for the selective detection of catecholamines in the last 15 years, with special focus on highly innovative features introduced by nanotechnology.

TL;DR: A method of magnetic solid phase extraction (MSPE) combined with inductively coupled plasma mass spectrometry (ICP-MS) was developed for the speciation of CH3Hg(+) and Hg(2+) in environmental water and human hair samples.

TL;DR: Fe3O4@SiO2@TiO2 showed efficient photocatalytic decomposition for tartrazine and sunset yellow in aqueous solution under the irradiation of UV light and the process was found to fit with the second order kinetic model and Langmuir isotherm.

TL;DR: This review paper focusses on the latest development of MIPs for the analysis of personal care products in the environment, with particular emphasis on design, preparation and practical applications of M IPs.

TL;DR: Magnetic allylamine modified graphene oxide-poly(vinyl acetate-co-divinylbenzene) (MGO-DVB-VA) was synthesized and used for magnetic solid phase extraction of Pb, Cd, Cu, Ni, Ni and Co prior to their determination by flame atomic absorption spectroscopy.

TL;DR: The proposed optical biosensor was successfully applied to the detection of uric acid in human serum samples and found that the fluorescence of S, N co-doped C-dots was quenched apparently by hydroxyl radicals from Fenton reaction between H2O2 and Fe(2+).

TL;DR: Two data fusion strategies (high- and mid-level) combined with a multivariate classification approach (Soft Independent Modelling of Class Analogy, SIMCA) have been applied to take advantage of the synergistic effect of the information obtained from two spectroscopic techniques: FT-Raman and NIR.

TL;DR: An aptasensor was designed for the determination of aflatoxin M1 (AFM1) in milk based on DNA-aptamer recognition and electrochemical impedance spectroscopy detection and application to milk analysis showed that a preliminary treatment was mandatory.

TL;DR: The paper reports for the first time the direct determination of silver ion (Ag(+)) using luminescent Carbon Quantum Dot hydrogels (CQDGs) and the most selective CQDG system for Ag(+) ion detection proved to be those containing carboxylic groups onto their surface.

TL;DR: Simultaneous determination of compounds by voltammetry offers the advantages of being economical and less time consuming as more than one analyte can be detected easily on the fabricated sensor at the same time.

TL;DR: Different silver enhancement methods and one dual gold conjugation are selected and critically compared the amplification produced when applied to a gold-nanoparticle based lateral flow immunoassay for the detection of prostate specific antigen (PSA).

TL;DR: An electrochemical biosensor for CAP was constructed based on 3DRGO-modified glass carbon electrode (3DRGO/GCE), which exhibited a remarkable performance with an excellent selectivity, stability, reproducibility, and satisfying recovery result for CAP detection in real samples.

TL;DR: In this review, recent progress of novel nanomaterials applied in sample preparation has been summarized and discussed and both nanoparticles and nanoporous materials are evaluated for their unusual performance in sample preparations.