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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

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 Open Access 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: Recent HOT articles
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
From the themed collection: Recent HOT articles
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
From the themed collection: Recent HOT articles
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 Open Access 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
Paper

Estimation of relative oxygen metabolic activity microdistribution in biofilms based on the catastrophe point phenomenon during oxygen-infusion processes

A new method has been developed for estimating relative oxygen metabolic activity microdistribution in biofilms based on catastrophe points during oxygen-infusion processes.

Graphical abstract: Estimation of relative oxygen metabolic activity microdistribution in biofilms based on the catastrophe point phenomenon during oxygen-infusion processes
From the themed collection: Recent HOT articles
Paper

Normalization strategy for the LC-MS bioanalysis of protein kinetics assays via internal proteolytic analyte utilized as control standard: application in studies of HIV-1 protease cleavage of HIV-1 Gag polyprotein in HIV maturation inhibition research

The LC-MS bioanalysis of protein kinetics assays is simplified by a data normalization strategy via internal proteolytic analyte utilized as a control standard.

Graphical abstract: Normalization strategy for the LC-MS bioanalysis of protein kinetics assays via internal proteolytic analyte utilized as control standard: application in studies of HIV-1 protease cleavage of HIV-1 Gag polyprotein in HIV maturation inhibition research
From the themed collection: Recent HOT articles
Paper

Rapid and sensitive detection of E. coli O157:H7 based on antimicrobial peptide functionalized magnetic nanoparticles and urease-catalyzed signal amplification

Rapid and sensitive detection of E. coli O157:H7 based on antimicrobial peptide functionalized magnetic nanoparticles and label-free urease-catalyzed signal amplification.

Graphical abstract: Rapid and sensitive detection of E. coli O157:H7 based on antimicrobial peptide functionalized magnetic nanoparticles and urease-catalyzed signal amplification
From the themed collection: Recent HOT articles
Paper

Development of an easily adaptable, high sensitivity source for inlet ionization

Unexpected ionization processes were recently discovered for use in mass spectrometry in which no added energy is required to convert condensed-phase molecules to gas-phase ions with ESI-like charge states by simply introducing the matrix/analyte sample into the sub-atmospheric pressure of the mass spectrometer.

Graphical abstract: Development of an easily adaptable, high sensitivity source for inlet ionization
From the themed collection: Recent HOT articles
Paper

Pulsed probe electrospray and nano-electrospray: the temporal profiles of ion formation from the Taylor cone

The temporal profiles of ion signals were measured for probe electrospray ionization (PESI) and nano-electrospray ionization (nESI) by changing the pulse width of the high voltage applied to the emitters.

Graphical abstract: Pulsed probe electrospray and nano-electrospray: the temporal profiles of ion formation from the Taylor cone
From the themed collection: Recent HOT articles
Paper

Metabolic comparison of dorsal versus ventral cells directly in the live 8-cell frog embryo by microprobe single-cell CE-ESI-MS

We uncovered previously unknown metabolic differences between dorsal and ventral cells in the 8-cell vertebrate embryo using microprobe single-cell CE-ESI-MS.

Graphical abstract: Metabolic comparison of dorsal versus ventral cells directly in the live 8-cell frog embryo by microprobe single-cell CE-ESI-MS
From the themed collection: Recent HOT articles
Paper

Optimization of subcritical water extraction of phenolic antioxidants from pomegranate (Punica granatum L.) peel by response surface methodology

Subcritical water extraction (SWE), a ‘green’ and efficient extraction technology, was applied to extract phenolic antioxidants from pomegranate peel in this study.

Graphical abstract: Optimization of subcritical water extraction of phenolic antioxidants from pomegranate (Punica granatum L.) peel by response surface methodology
From the themed collection: Recent HOT articles
Paper

Pentafluorophenyl bonded phase separation: the assay of Australian antioxidant formulation of ascorbic acid, rutin and hesperidin

This work describes two novel validated HPLC methods for the separation and determination of potent antioxidant formulation.

Graphical abstract: Pentafluorophenyl bonded phase separation: the assay of Australian antioxidant formulation of ascorbic acid, rutin and hesperidin
From the themed collection: Recent HOT articles
Paper

Amino-terminated hyper-branched polyamidoamine polymer grafted magnetic graphene oxide nanosheets as an efficient sorbent for the extraction of selective serotonin reuptake inhibitors from plasma samples

In this study, third generation dendrimers covalently bonded to magnetic graphene oxide nanosheets (DMGO) were prepared.

Graphical abstract: Amino-terminated hyper-branched polyamidoamine polymer grafted magnetic graphene oxide nanosheets as an efficient sorbent for the extraction of selective serotonin reuptake inhibitors from plasma samples
From the themed collection: Recent HOT articles
Paper

A simple and sensitive electrochemical detection of furazolidone based on an Au nanoparticle functionalized graphene modified electrode

A new sensor using a glassy carbon electrode modified with graphene and Au nanoparticles (Gr/Au/GCE) was designed to investigate the electrochemical behavior of furazolidone (FZD).

Graphical abstract: A simple and sensitive electrochemical detection of furazolidone based on an Au nanoparticle functionalized graphene modified electrode
From the themed collection: Recent HOT articles
Paper

FTIR as a rapid tool for monitoring molecular weight distribution during enzymatic protein hydrolysis of food processing by-products

An FTIR-based multivariate approach is developed for monitoring molecular weight distribution during enzymatic protein hydrolysis of byproducts.

Graphical abstract: FTIR as a rapid tool for monitoring molecular weight distribution during enzymatic protein hydrolysis of food processing by-products
From the themed collection: Recent HOT articles
Paper

Retrospective case study on the suitability of mid-infrared microscopic imaging for the diagnosis of mucormycosis in human tissue sections

MIR microscopic imaging with subsequent PCA clustering is a very promising tool for the detection and identification of mucormycetes in pathology routine laboratories.

Graphical abstract: Retrospective case study on the suitability of mid-infrared microscopic imaging for the diagnosis of mucormycosis in human tissue sections
From the themed collection: Recent HOT articles
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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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