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Themed collection Recent HOT articles

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Plasma-based ambient mass spectrometry: a step forward to practical applications

Plasma-based ambient mass spectrometry (AMS) exhibits great potential in the direct analysis of raw samples with minimum pretreatment.

Graphical abstract: Plasma-based ambient mass spectrometry: a step forward to practical applications
From the themed collection: Recent HOT articles
Critical Review

Nanotechnology-based analytical approaches for detection of viruses

The risks posed by viral diseases have been recognised as critical threats to mankind.

Graphical abstract: Nanotechnology-based analytical approaches for detection of viruses
From the themed collection: Recent HOT articles
Critical Review

Some problems and practicalities in design and interpretation of samples of microplastic waste

Improved design of sampling microplastic waste is necessary. Important problems are identified and suggestions for improvements are made.

Graphical abstract: Some problems and practicalities in design and interpretation of samples of microplastic waste
From the themed collection: Recent HOT articles
Communication

One-step detection of hexokinase activity using a personal glucose meter

Using commercially available personal glucose meters for the determination of hexokinase activity.

Graphical abstract: One-step detection of hexokinase activity using a personal glucose meter
From the themed collection: Recent HOT articles
Communication

A pyrene-based fast-responsive fluorescent probe for G-quadruplexes

A novel pyrene-based fluorescent probe (3-methyl-2-(pyren-1-yl)benzo[d]thiazol-3-ium iodide) (PBT) was found to be a fast-responsive and highly selective towards G-quadruplexes. PBT exhibited an opposite fluorescent variation tendency on binding with G-quadruplexes and ds-DNAs.

Graphical abstract: A pyrene-based fast-responsive fluorescent probe for G-quadruplexes
From the themed collection: Recent HOT articles
Paper

Controllable synthesis of cellulose benzoates for understanding of chiral recognition mechanism and fabrication of highly efficient chiral stationary phases

The core of enantioseparation is to combine the hydrophobic helical conformation of cellulose derivatives with weak non-enantioselective interactions.

Graphical abstract: Controllable synthesis of cellulose benzoates for understanding of chiral recognition mechanism and fabrication of highly efficient chiral stationary phases
From the themed collection: Recent HOT articles
Paper

Improvements in identification and quantitation of pesticide residues in food by LC-QTOF using sequential mass window acquisition (SWATH®)

The efficiency of a data independent acquisition by the sequential window acquisition of all theoretical fragment ions (SWATH®) in high resolution accurate mass spectrometry was evaluated for pesticide residue analysis.

Graphical abstract: Improvements in identification and quantitation of pesticide residues in food by LC-QTOF using sequential mass window acquisition (SWATH®)
From the themed collection: Recent HOT articles
Paper

Multi-waveform fast-scan cyclic voltammetry mapping of adsorption/desorption kinetics of biogenic amines and their metabolites

A novel multi-waveform FSCV (M-FSCV) developed for characterizing adsorption/desorption kinetics of neurotransmitters.

Graphical abstract: Multi-waveform fast-scan cyclic voltammetry mapping of adsorption/desorption kinetics of biogenic amines and their metabolites
From the themed collection: Recent HOT articles
Paper

Determination of alkyl ammonium ionic liquid cations by hydrophilic interaction liquid chromatography and its application in analysis of environmental water

Analysis of alkyl ammonium ionic liquid cations in environmental water by the reversed phase ion-pair SPE combined with HILIC-IUV. (a) The chromatogram of alkyl ammonium cations; (b) the chromatogram of alkyl ammonium cations after enrichment.

Graphical abstract: Determination of alkyl ammonium ionic liquid cations by hydrophilic interaction liquid chromatography and its application in analysis of environmental water
From the themed collection: Recent HOT articles
Paper

Low cost adsorbents in ultrasound-assisted dispersive micro solid-phase extraction for simultaneous determination of indium and nickel by high-resolution continuum source graphite furnace atomic absorption spectrometry in soils and sediments

In this study, the analytical potential of USA DMSPE with bentonite clay as a low cost adsorbent combined with HR-CS GF AAS in the simultaneous determination of In and Ni was evaluated.

Graphical abstract: Low cost adsorbents in ultrasound-assisted dispersive micro solid-phase extraction for simultaneous determination of indium and nickel by high-resolution continuum source graphite furnace atomic absorption spectrometry in soils and sediments
From the themed collection: Recent HOT articles
Paper

A colorimetric method for cysteine determination based on the peroxidase-like activity of ficin

H2O2 could oxidize TMB to blue-colored oxTMB with catalysis by ficin. L-Cys competed with TMB for H2O2 leading to fading of the chromogenic reaction.

Graphical abstract: A colorimetric method for cysteine determination based on the peroxidase-like activity of ficin
From the themed collection: Recent HOT articles
Paper

Determination of polycyclic aromatic hydrocarbons with molecular mass 302 in standard reference material 1597a by reversed-phase liquid chromatography and stop-flow fluorescence detection

NPLC-RPLC/FL and stop-flow fluorescence spectral analysis for the six-ring MM 302 PAH isomers in SRM 1597a.

Graphical abstract: Determination of polycyclic aromatic hydrocarbons with molecular mass 302 in standard reference material 1597a by reversed-phase liquid chromatography and stop-flow fluorescence detection
From the themed collection: Recent HOT articles
Paper

Determination of Cu2+ and biothiols by novel red fluorescent hybrid nanoparticles

Red fluorescent hybrid nanoparticles (NPG@PFBD) have been designed and synthesized successfully.

Graphical abstract: Determination of Cu2+ and biothiols by novel red fluorescent hybrid nanoparticles
From the themed collection: Recent HOT articles
Open Access Paper

A novel EI-GC/MS method for the accurate quantification of anti-aging compound oleoylethanolamine in C. elegans

A novel GC-MS method for the quantification of oleoylethanolamine in C. elegans.

Graphical abstract: A novel EI-GC/MS method for the accurate quantification of anti-aging compound oleoylethanolamine in C. elegans
From the themed collection: Recent HOT articles
Paper

Direct and ultrasensitive fluorescence detection of PETN vapor based on a fuorene-dimer probe via a synergic backbone and side-chain tuning

Due to TPA attraction, the distance between PETN and 6TPA-2FT is shortened, and both PET and intermolecular forces are promoted.

Graphical abstract: Direct and ultrasensitive fluorescence detection of PETN vapor based on a fuorene-dimer probe via a synergic backbone and side-chain tuning
From the themed collection: Recent HOT articles
Paper

Electrochemical sensing of NBOMes and other new psychoactive substances in blotting paper by square-wave voltammetry on a boron-doped diamond electrode

The electrochemical quantification of NBOMes and their correlates in seized blotting paper is presented.

Graphical abstract: Electrochemical sensing of NBOMes and other new psychoactive substances in blotting paper by square-wave voltammetry on a boron-doped diamond electrode
From the themed collection: Recent HOT articles
Paper

A sensitive UPLC-APCI-MS/MS method for the determination of dexamethasone and its application in an ocular tissue distribution study in rabbits following topical administration

A sensitive, specific and rapid ultra-performance liquid chromatography tandem mass spectrometry method has been developed and validated for the determination of dexamethasone (DEX) in ocular tissues of rabbits.

Graphical abstract: A sensitive UPLC-APCI-MS/MS method for the determination of dexamethasone and its application in an ocular tissue distribution study in rabbits following topical administration
From the themed collection: Recent HOT articles
Paper

Exploring MBTH as a spectrophotometric probe for the determination of total phenolic compounds in beverage samples

An alternative method using MBTH as a spectrophotometric probe for the determination of total phenolic compounds in samples of wines (red and white), coffees (instant and brewed), teas and infusions.

Graphical abstract: Exploring MBTH as a spectrophotometric probe for the determination of total phenolic compounds in beverage samples
From the themed collection: Recent HOT articles
Paper

Highly selective preconcentration of ultra-trace amounts of lead ions in real water and food samples by dispersive solid phase extraction using modified magnetic graphene oxide as a novel sorbent

A simple dispersive solid-phase extraction method coupled with atomic absorption spectrometry detection was developed for selective separation of ultra-trace of lead ion using graphene oxide modified such as the pseudo imprinted polymer sorbent in real samples.

Graphical abstract: Highly selective preconcentration of ultra-trace amounts of lead ions in real water and food samples by dispersive solid phase extraction using modified magnetic graphene oxide as a novel sorbent
From the themed collection: Recent HOT articles
Paper

Disposable graphene sensor with an internal reference electrode for stripping analysis of heavy metals

An all-graphene-based disposable sensor with a ‘built in’ internal reference was applied for the stripping analysis of heavy metals.

Graphical abstract: Disposable graphene sensor with an internal reference electrode for stripping analysis of heavy metals
From the themed collection: Recent HOT articles
Open Access Paper

Measuring the size and density of nanoparticles by centrifugal sedimentation and flotation

Analytical centrifugation in sedimentation and flotation modes is used to measure both the size and density of polystyrene nanoparticles.

Graphical abstract: Measuring the size and density of nanoparticles by centrifugal sedimentation and flotation
From the themed collection: Recent HOT articles
Paper

Ultrasensitive and direct fluorescence detection of RDX explosive vapor via side-chain terminal functionalization of a polyfluorene probe

We have designed and synthesized a polyfluorene probe with side-chain terminals functionalized with Boc-NH– units (PF6-Boc) for ultrasensitive RDX explosive vapor detection.

Graphical abstract: Ultrasensitive and direct fluorescence detection of RDX explosive vapor via side-chain terminal functionalization of a polyfluorene probe
From the themed collection: Recent HOT articles
Paper

Highly emissive salicylidene Schiff bases (SASBs) in solution and their application in the detection of the chemical warfare agent mimic diethyl chlorophosphate

Salicylidene Schiff bases (SASBs) have attracted significant attention because they have unique properties and can be simply synthesized by the condensation reactions; however, their poor fluorescence in solution makes them unable to be used as a fluorescent turn-off probe and limits their application fields.

Graphical abstract: Highly emissive salicylidene Schiff bases (SASBs) in solution and their application in the detection of the chemical warfare agent mimic diethyl chlorophosphate
From the themed collection: Recent HOT articles
Paper

Quantitative comparison of three representative staining methods for the development of multichannel colorimetric biochips

Quantitative comparison of three representative staining methods for developing multichannel colorimetric biochips, which allow visual detection of multiple cancer markers.

Graphical abstract: Quantitative comparison of three representative staining methods for the development of multichannel colorimetric biochips
From the themed collection: Recent HOT articles
Paper

A Pt and Pd bimetal nanowire based stereoselective sensor for the discrimination of ascorbic acid and isoascorbic acid

A simple Pt and Pd bimetal nanowire based stereoselective sensor for the recognition of ascorbic acid and isoascorbic acid.

Graphical abstract: A Pt and Pd bimetal nanowire based stereoselective sensor for the discrimination of ascorbic acid and isoascorbic acid
From the themed collection: Recent HOT articles
Paper

Online coupling of tandem liquid-phase extraction with HPLC-UV for the determination of trace N-nitrosamines in food products

N-Nitrosamines (NAs) are potent carcinogens and have been found in food products.

Graphical abstract: Online coupling of tandem liquid-phase extraction with HPLC-UV for the determination of trace N-nitrosamines in food products
From the themed collection: Recent HOT articles
Paper

Quantification of cocaine and its adulterants by nuclear magnetic resonance spectroscopy without deuterated solvents (No-D qNMR)

A new analytical method was developed to quantify cocaine and some adulterants using nuclear magnetic resonance spectroscopy without the use of deuterated solvents.

Graphical abstract: Quantification of cocaine and its adulterants by nuclear magnetic resonance spectroscopy without deuterated solvents (No-D qNMR)
From the themed collection: Recent HOT articles
Paper

The stability of 57 consensus values in a proficiency test material re-issued blind after an interval of 18 years

Despite changes in the analytical methodology and the population of participant laboratories, there was remarkably little change in the consensus values.

Graphical abstract: The stability of 57 consensus values in a proficiency test material re-issued blind after an interval of 18 years
From the themed collection: Recent HOT articles
Paper

Encapsulating a ruthenium(II) complex into metal organic frameworks to engender high sensitivity for dopamine electrochemiluminescence detection

In this contribution, an ultra-sensitive electrochemiluminescence (ECL) sensor was proposed for dopamine (DA) detection based on ruthenium(II) complex (tris(2,2-bipyridyl)dichlororuthenium(II) hexahydrate, Ru(bpy)32+) functionalized Zn(II) metal–organic frameworks (Ru-MOFs).

Graphical abstract: Encapsulating a ruthenium(ii) complex into metal organic frameworks to engender high sensitivity for dopamine electrochemiluminescence detection
From the themed collection: Recent HOT articles
Paper

Engineering oligonucleotide-based peroxidase mimetics for the colorimetric assay of S1 nuclease

DNA–Cu(II) complexes lose their peroxidase-like activities after the cleavage of DNA scaffolds by S1 nuclease.

Graphical abstract: Engineering oligonucleotide-based peroxidase mimetics for the colorimetric assay of S1 nuclease
From the themed collection: Recent HOT articles
Paper

Application of syringe to syringe dispersive micro-solid phase extraction using a magnetic layered double hydroxide for the determination of cadmium(II) and lead(II) ions in food and water samples

In this work, a new mode of dispersive solid-phase extraction named syringe to syringe magnetic dispersive micro-solid phase extraction is presented as an efficient and eco-friendly sample extraction method.

Graphical abstract: Application of syringe to syringe dispersive micro-solid phase extraction using a magnetic layered double hydroxide for the determination of cadmium(ii) and lead(ii) ions in food and water samples
From the themed collection: Recent HOT articles
Paper

In situ methanation with flame ionization detection for the determination of carbon dioxide in various matrices

An analytical technique that employs in situ methanation with flame ionization detection for the measurement of carbon dioxide in various matrices has been developed and implemented.

Graphical abstract: In situ methanation with flame ionization detection for the determination of carbon dioxide in various matrices
From the themed collection: Recent HOT articles
Paper

Paper based lateral flow immunoassay for the enumeration of Escherichia coli in urine

In this experimental study, we developed lateral flow immunoassay strips for the detection of Escherichia coli.

Graphical abstract: Paper based lateral flow immunoassay for the enumeration of Escherichia coli in urine
From the themed collection: Recent HOT articles
Paper

Rapid discrimination of natural polyphenols (vegetable tannins) from different plants by molecular spectroscopy and PLS-DA

In this work, samples of natural polyphenolic extracts, representing six commercially available types, were analysed by visible, ultraviolet and Fourier transform infrared (FTIR) spectroscopy using a classification technique.

Graphical abstract: Rapid discrimination of natural polyphenols (vegetable tannins) from different plants by molecular spectroscopy and PLS-DA
From the themed collection: Recent HOT articles
Paper

A novel non-targeted screening method for urinary exposure biomarker discovery of phthalates using liquid chromatography-mass spectrometry

Phthalates are a group of compounds widely used in consumer products and they are ubiquitous in the environment due to their widespread commercial use.

Graphical abstract: A novel non-targeted screening method for urinary exposure biomarker discovery of phthalates using liquid chromatography-mass spectrometry
From the themed collection: Recent HOT articles
Paper

A G-quadruplex DNAzyme-based LAMP biosensing platform for a novel colorimetric detection of Listeria monocytogenes

A LAMP-based method for the visual detection of Listeria monocytogenes has been developed by employing DNAzyme-catalyzed cascade amplification of the colorimetric signal.

Graphical abstract: A G-quadruplex DNAzyme-based LAMP biosensing platform for a novel colorimetric detection of Listeria monocytogenes
From the themed collection: Recent HOT articles
Paper

Bar adsorptive microextraction (BAμE) with a polymeric sorbent for the determination of emerging contaminants in water samples by ultra-high performance liquid chromatography with tandem mass spectrometry

A central composite design was applied to evaluate different sorbents in BAμE for the determination of emerging contaminants in water by UHPLC-MS/MS.

Graphical abstract: Bar adsorptive microextraction (BAμE) with a polymeric sorbent for the determination of emerging contaminants in water samples by ultra-high performance liquid chromatography with tandem mass spectrometry
From the themed collection: Recent HOT articles
Paper

Historical mystery solved: a multi-analytical approach to the identification of a key marker for the historical use of brazilwood (Caesalpinia spp.) in paintings and textiles

Brazilwood-derived pigments and dyes are found in many historical objects, from European paintings to North American First Nations textiles.

Graphical abstract: Historical mystery solved: a multi-analytical approach to the identification of a key marker for the historical use of brazilwood (Caesalpinia spp.) in paintings and textiles
From the themed collection: Recent HOT articles
Paper

A “turn-on” fluorescence sensor for ascorbic acid based on graphene quantum dots via fluorescence resonance energy transfer

For the first time, a FRET nanosensor for AA was developed using GQDs as the energy donors and SQA-iron(III) as the energy acceptors.

Graphical abstract: A “turn-on” fluorescence sensor for ascorbic acid based on graphene quantum dots via fluorescence resonance energy transfer
From the themed collection: Recent HOT articles
Paper

A lysosome-targeting colorimetric and fluorescent dual signal probe for sensitive detection and bioimaging of hydrogen sulfide

In this study, we developed a lysosome-targeting fluorescent probe, 3-(2,4-dinitrophenoxy)-2-(4-morpholinophenyl)-4H-chromen-4-one (DMC), for the detection of hydrogen sulfide (H2S) based on excited-state intramolecular proton transfer (ESIPT).

Graphical abstract: A lysosome-targeting colorimetric and fluorescent dual signal probe for sensitive detection and bioimaging of hydrogen sulfide
From the themed collection: Recent HOT articles
Paper

Probing specific gravity in real-time with graphene oxide plasmonics

Graphene oxide enhanced SPR sensor for specific gravity detection of food analytes.

Graphical abstract: Probing specific gravity in real-time with graphene oxide plasmonics
From the themed collection: Recent HOT articles
Paper

Enhanced microchip electrophoresis separations combined with electrochemical detection utilizing a capillary embedded in polystyrene

A polystyrene–PDMS device utilizing an embedded fused silica capillary and electrochemical detection was used for improved efficiency separations of catecholamines.

Graphical abstract: Enhanced microchip electrophoresis separations combined with electrochemical detection utilizing a capillary embedded in polystyrene
From the themed collection: Microfluidic systems with societal impact
Paper

Validation of a lateral flow immunoassay for the rapid determination of aflatoxins in maize by solvent free extraction

The analytical performances of a lateral flow immunoassay (AFLA-V AQUA™, Vicam a Waters Business) for the determination of aflatoxins in maize were evaluated according to Commission Regulation (EU) No. 519/2014.

Graphical abstract: Validation of a lateral flow immunoassay for the rapid determination of aflatoxins in maize by solvent free extraction
From the themed collection: Recent HOT articles
Paper

An ultrasensitive electrochemiluminescent D-alanine biosensor based on the synergetic catalysis of a hemin-functionalized composite and gold–platinum nanowires

Herein, an ultrasensitive and stereo-selective electrochemiluminescent (ECL) biosensor based on ECL signal amplification of luminol by the synergetic catalysis of a hemin-functionalized composite and gold–platinum nanowires (Au-PtNWs) has been designed for the detection of D-alanine (D-Ala).

Graphical abstract: An ultrasensitive electrochemiluminescent d-alanine biosensor based on the synergetic catalysis of a hemin-functionalized composite and gold–platinum nanowires
From the themed collection: Recent HOT articles
Paper

SERS-fluorescence bimodal nanoprobes for in vitro imaging of the fatty acid responsive receptor GPR120

Multi-functional hybrid nanoparticles are synthesized for fluorescence-SERS bimodal imaging of GPR120 in vitro.

Graphical abstract: SERS-fluorescence bimodal nanoprobes for in vitro imaging of the fatty acid responsive receptor GPR120
From the themed collection: Recent HOT articles
Paper

TiO2/CdS nanorod array-based photoelectrochemical sensing of Cu2+ in human serum samples

A sensitive and selective photoelectrochemical sensor for the detection of Cu2+ in human serum samples based on the TiO2/CdS nanorod array was reported.

Graphical abstract: TiO2/CdS nanorod array-based photoelectrochemical sensing of Cu2+ in human serum samples
From the themed collection: Recent HOT articles
Paper

Lysozyme-stabilized bimetallic gold/silver nanoclusters as a turn-on fluorescent probe for determination of ascorbic acid and acid phosphatase

Bimetallic gold/silver nanoclusters were synthesized in aqueous solution with lysozyme as a stabilizing and reducing agent.

Graphical abstract: Lysozyme-stabilized bimetallic gold/silver nanoclusters as a turn-on fluorescent probe for determination of ascorbic acid and acid phosphatase
From the themed collection: Recent HOT articles
Paper

CVD graphene incorporating polymerized L-cysteine as an electrochemical sensing platform for simultaneous determination of dopamine and ascorbic acid

A novel electrochemical sensor based on a poly-L-cysteine/graphene platform was developed for the simultaneous determination of dopamine and ascorbic acid.

Graphical abstract: CVD graphene incorporating polymerized l-cysteine as an electrochemical sensing platform for simultaneous determination of dopamine and ascorbic acid
From the themed collection: Recent HOT articles
Paper

New combination between chitosan, single walled carbon nanotubes and neodymium(III) oxide found to be useful in the electrochemical determination of rutin in the presence of morin and quercetin

A glassy carbon electrode surface was modified with a new combination of chitosan, single walled carbon nanotubes (SWCNT) and neodymium(III) oxide (NdOX) and was found to be effective in the detection of rutin (RU).

Graphical abstract: New combination between chitosan, single walled carbon nanotubes and neodymium(iii) oxide found to be useful in the electrochemical determination of rutin in the presence of morin and quercetin
From the themed collection: Recent HOT articles
Paper

Determination of alizarin red S based on layered double hydroxides-improved chemiluminescence from hydrogen peroxide and luminol

Selective alizarin red S detection based on the layered double hydroxides-improved chemiluminescence from hydrogen peroxide and luminol is presented.

Graphical abstract: Determination of alizarin red S based on layered double hydroxides-improved chemiluminescence from hydrogen peroxide and luminol
From the themed collection: Recent HOT articles
Paper

Electrophoretic deposition hyphenated with electrochemical anodization for the fabrication of phenyl-functionalized mesoporous silica onto Nitinol fibers for selective solid-phase microextraction of polycyclic aromatic hydrocarbons

Electrophoretic deposition (EPD) was hyphenated with electrochemical anodization for the fabrication of phenyl modified mesoporous silica (MPS-Ph) particles onto Nitinol (NiTi) wire as a solid-phase microextraction (SPME) fiber.

Graphical abstract: Electrophoretic deposition hyphenated with electrochemical anodization for the fabrication of phenyl-functionalized mesoporous silica onto Nitinol fibers for selective solid-phase microextraction of polycyclic aromatic hydrocarbons
From the themed collection: Recent HOT articles
Paper

Rapid determination of farinograph parameters of wheat flour using data fusion and a forward interval variable selection algorithm

A forward interval variable selection algorithm combined with data fusion was developed to determine farinograph parameters of wheat flour.

Graphical abstract: Rapid determination of farinograph parameters of wheat flour using data fusion and a forward interval variable selection algorithm
From the themed collection: Recent HOT articles
Paper

A selective nanosensor for ultrafast detection of Cu2+ ions based on C5 DNA-templated gold nanoclusters and Fenton-like reaction

Fenton-like reaction-mediated quenching of gold nanoclusters for ultrafast Cu2+ ion detection.

Graphical abstract: A selective nanosensor for ultrafast detection of Cu2+ ions based on C5 DNA-templated gold nanoclusters and Fenton-like reaction
From the themed collection: Recent HOT articles
Paper

Electrochemical nanostructure platform for the analysis of glutathione in the presence of uric acid and tryptophan

In this work, a NiO–CNT nanocomposite and 2-(3,4-dihydroxyphenethyl)isoindoline-1,3-dione (DPID) were used as modifiers for the modification of a carbon paste electrode (DPID/NiO–CNT/CPE) for the electro-catalytic analysis of glutathione (GSH).

Graphical abstract: Electrochemical nanostructure platform for the analysis of glutathione in the presence of uric acid and tryptophan
From the themed collection: Recent HOT articles
Paper

Microfluidic detection with acoustic spectroscopy (MIDAS) for analysis of insulin formulation stability

Ultrasonic spectroscopy is a viable complement to current techniques used to analyze insulin stability due to its simplicity, lack of sample preparation, and non-destructive properties.

Graphical abstract: Microfluidic detection with acoustic spectroscopy (MIDAS) for analysis of insulin formulation stability
Paper

Simultaneous detection of superoxide anion radicals and determination of the superoxide scavenging activity of antioxidants using a N,N-dimethyl-p-phenylene diamine/Nafion colorimetric sensor

A novel colorimetric DMPD assay was developed for superoxide radicals generated by the NADH/PMS/O2 system, and compared with conventional NBT assay.

Graphical abstract: Simultaneous detection of superoxide anion radicals and determination of the superoxide scavenging activity of antioxidants using a N,N-dimethyl-p-phenylene diamine/Nafion colorimetric sensor
Paper

Is measurement uncertainty from sampling related to analyte concentration?

The contribution of sampling to the combined uncertainty of measurement is assessed using a combination of literature review and experimental determination of sampling variability in a range of foodstuffs in order to determine whether there is a consistent relationship between analyte level and proportion of variation attributable to sampling.

Graphical abstract: Is measurement uncertainty from sampling related to analyte concentration?
From the themed collection: Recent HOT articles
Paper

Sphingosine and dihydrosphingosine as biomarkers for multiple sclerosis identified by metabolomic profiling using coupled UPLC-MS

The project aim was to identify differences in the metabolomic profiles in the serum of patients with multiple sclerosis (MS), those with neuropathic pain (NP) and those with both MS and NP compared with controls and to identify potential biomarkers of each disease state.

Graphical abstract: Sphingosine and dihydrosphingosine as biomarkers for multiple sclerosis identified by metabolomic profiling using coupled UPLC-MS
From the themed collection: Recent HOT articles
Paper

Visual determination of ferric ions in aqueous solution based on a high selectivity and sensitivity ratiometric fluorescent nanosensor

A novel ratiometric fluorescent nanosensor for visual sensing of Fe3+ has been developed by integrating yellow-emissive rhodamine derivatives (RhB) onto the surface of silica nanospheres embedded with red CdTe QDs.

Graphical abstract: Visual determination of ferric ions in aqueous solution based on a high selectivity and sensitivity ratiometric fluorescent nanosensor
From the themed collection: Recent HOT articles
Paper

Characterization of the major chemical constituents in Ardisia gigantifolia by high performance liquid chromatography coupled to electrospray ionization and quadrupole time-of-flight mass spectrometry

Rapid detection and characterization of the major chemical constituents from Ardisia gigantifolia by HPLC-ESI-QTOF-MS/MS.

Graphical abstract: Characterization of the major chemical constituents in Ardisia gigantifolia by high performance liquid chromatography coupled to electrospray ionization and quadrupole time-of-flight mass spectrometry
From the themed collection: Recent HOT articles
Paper

A supercharged fluorescent protein based FRET sensing platform for detection of heparin contamination

A FRET system was successfully constructed using supercharged green fluorescent protein as the energy donor and dye labelled heparin as the energy acceptor. The FRET sensing platform can be used to detect OSCS contaminant in heparin.

Graphical abstract: A supercharged fluorescent protein based FRET sensing platform for detection of heparin contamination
From the themed collection: Recent HOT articles
Paper

A novel photoelectrode based on eosin Y–rhodamine B duo-dye sensitized Au nanoparticles by in situ reduction

A novel strategy for the fabrication of a photoelectrochemical system, involving a duo-dye sensitized Au NPs composite, that displays a specific response to mercury.

Graphical abstract: A novel photoelectrode based on eosin Y–rhodamine B duo-dye sensitized Au nanoparticles by in situ reduction
From the themed collection: Recent HOT articles
Paper

Frequency characterization of flow magnitude and phase in resonant microfluidic circuits

Microfluidic equivalents of electrical resonant circuits exhibit predicted resonance behavior in both magnitude and phase of the harmonic flow as evidenced by two independent characterization techniques.

Graphical abstract: Frequency characterization of flow magnitude and phase in resonant microfluidic circuits
From the themed collection: Recent HOT articles
Paper

Determination of trace rhodamine B by spectrofluorometry and magnetic solid phase extraction based on a 3D reduced graphene oxide composite

Sample pre-treatment by magnetic solid phase extraction based on a 3D reduced graphene oxide composite.

Graphical abstract: Determination of trace rhodamine B by spectrofluorometry and magnetic solid phase extraction based on a 3D reduced graphene oxide composite
From the themed collection: Recent HOT articles
Paper

In situ cocoa beans quality grading by near-infrared-chemodyes systems

Cocoa beans were quality graded innovatively using a near-infrared chemo-dyes system as aroma sensor to capture and detect their volatiles.

Graphical abstract: In situ cocoa beans quality grading by near-infrared-chemodyes systems
From the themed collection: Recent HOT articles
Paper

Highly sensitive electrochemical detection of mercuric ions based on sequential nucleic acid amplification and guanine nanowire formation

This work reported a strategy of combining enzyme/DNAzyme amplification and guanine nanowires to develop a bioassay for Hg2+ detection.

Graphical abstract: Highly sensitive electrochemical detection of mercuric ions based on sequential nucleic acid amplification and guanine nanowire formation
From the themed collection: Recent HOT articles
Open Access Paper

FTIR-spectroscopic and LA-ICP-MS imaging for combined hyperspectral image analysis of tumor models

Advantages of combined image analysis were demonstrated using infrared spectroscopy and mass spectrometry while characterizing biochemical changes occurring in tumor models.

Graphical abstract: FTIR-spectroscopic and LA-ICP-MS imaging for combined hyperspectral image analysis of tumor models
From the themed collection: Recent HOT articles
Paper

A fluorescence-enhanced probe for rapid detection of formaldehyde and its application for cell imaging

An anthracene carboxyimide-based fluorescent probe was developed for rapid detection of formaldehyde in living cells with high sensitivity and selectivity.

Graphical abstract: A fluorescence-enhanced probe for rapid detection of formaldehyde and its application for cell imaging
From the themed collection: Recent HOT articles
Paper

A signal-off aptasensor for the determination of Ochratoxin A by differential pulse voltammetry at a modified Au electrode using methylene blue as an electrochemical probe

A signal-off aptasensor for OTA detection at an apt/cDNA/AuNPs/cPC/NH2–AuE electrode using methylene blue as an electrochemical probe.

Graphical abstract: A signal-off aptasensor for the determination of Ochratoxin A by differential pulse voltammetry at a modified Au electrode using methylene blue as an electrochemical probe
From the themed collection: Recent HOT articles
Paper

Control of pH for separated quantitation of nitrite and cyanide ions using photoluminescent copper nanoclusters

A dual sensing probe for quantitation of NO2 and CN ions.

Graphical abstract: Control of pH for separated quantitation of nitrite and cyanide ions using photoluminescent copper nanoclusters
From the themed collection: Recent HOT articles
103 items - Showing page 1 of 2

About this collection

This collection represents the top 10% of research published in Analytical Methods in the last couple of years. Featured articles are marked as HOT by the handling editor or as recommended by referees. Congratulations to all the authors whose articles are featured.

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