All Outputs (133)

Applications of gas chromatography and gas chromatography-mass spectrometry for the determination of illegal drugs used in drink spiking (2025)
Journal Article

Drink spiking is a significant public safety issue, often linked to crimes such as theft and sexual assault. The detection of drugs used in these incidents is challenging due to the low concentrations (<ng) and complex matrices involved. This review...

High performance anion-exchange chromatography electro-chemical determination of uric acid as a contamination marker (2025)
Journal Article

This study presents the first instance of determining environmental uric acid in urban dust using high-performance anion-exchange chromatography coupled with electrochemical detection. The optimum chromatographic conditions were identified as a 10 m... Read More about High performance anion-exchange chromatography electro-chemical determination of uric acid as a contamination marker.

Experiments in digital image colorimetry: Smartphone determination of acetaminophen (2025)
Presentation / Conference Contribution

Acetaminophen paracetamol) can be determined colorimetrically (scheme 1) by firstly, reducing ferricyanide to ferrocyanide. This can then be converted to the highly coloured Prussian Blue, following the addition of iron(III ). Traditionally, this is... Read More about Experiments in digital image colorimetry: Smartphone determination of acetaminophen.

Digital image colorimetry smartphone-based determination of hydrogen peroxide using titanium oxysulfate and red, green, and blue analysis (2025)
Journal Article

Previous studies have shown the possibility of colorimetrically determining hydrogen peroxide by its reaction with titanium oxysulfate, to give an orange-coloured complex (absorbance maxima = 410 nm). In this present investigation, we show the possib... Read More about Digital image colorimetry smartphone-based determination of hydrogen peroxide using titanium oxysulfate and red, green, and blue analysis.

An anodic stripping voltammetric approach for total mercury determination in sea sponges from the Niger Delta region of Nigeria (2024)
Journal Article

Mercury pollution from ongoing crude oil refining and waste disposal activities threatens aquatic ecosystems and human health in the Niger Delta. Mercury monitoring exercise in this region is challenging due to the high cost of traditional instrument... Read More about An anodic stripping voltammetric approach for total mercury determination in sea sponges from the Niger Delta region of Nigeria.

Cyclic voltammetric behaviour and high-performance liquid chromatography amperometric determination of levamisole (2024)
Journal Article

The electrochemical oxidation of levamisole, a glassy carbon electrode, was investigated over the pH range 2.0–10.0. Cyclic voltammetric investigations showed a single oxidation process was recorded, with a peak potential (Ep) shown to be pH-dependen... Read More about Cyclic voltammetric behaviour and high-performance liquid chromatography amperometric determination of levamisole.

Under-researched and under-reported new findings in microplastic field (2024)
Journal Article

After over 20 years of research on microplastic (MP) pollution, there are important areas of study which are still at the inception. In particular, between 2020 and 2023 new findings on MP have emerged, which open new sub-categories of MP research. T... Read More about Under-researched and under-reported new findings in microplastic field.

Development of an on-column trace enrichment method for the determination of sub-μg/L bisphenol A in bottled water by RP-HPLC with fluorescent detection (2024)
Journal Article

A simple extraction-free, on-column trace enrichment liquid chromatographic method for the determination of trace levels of bisphenol A (BPA) in bottled water samples has been developed. It was found possible to determine ng/L (ppt) levels of BPA by... Read More about Development of an on-column trace enrichment method for the determination of sub-μg/L bisphenol A in bottled water by RP-HPLC with fluorescent detection.

Digital image colorimetry smartphone determination of acetaminophen (2023)
Journal Article

Acetaminophen can be determined colorimetrically via its reduction of ferricyanide to give ferrocyanide. The ferrocyanide formed can then be converted to the highly colored compound, Prussian Blue, via the addition of iron(III). Quantification is com... Read More about Digital image colorimetry smartphone determination of acetaminophen.

New applications of gas chromatography and gas chromatography-mass spectrometry for novel sample matrices in the forensic sciences: A literature review (2023)
Journal Article

The investigation of novel sample matrices in the forensic sciences offers several possible advantages, such as allowing for results to be obtained in cases where common sample types are absent. This review focuses on the application of gas chromatog... Read More about New applications of gas chromatography and gas chromatography-mass spectrometry for novel sample matrices in the forensic sciences: A literature review.

WATER'S SILENT HORMONE MONITORING: A novel electrochemical sensor for on-site detection of estradiol in water (2023)
Presentation / Conference Contribution

The supply of safe drinking water is paramount for the health and well-being of people across the globe. Environmental pollutants such as estradiol (E2) threaten water supplies. Estradiol contamination of water sources is a growing global concern tha... Read More about WATER'S SILENT HORMONE MONITORING: A novel electrochemical sensor for on-site detection of estradiol in water.

Determination of licit and illicit drugs and metabolites in human sweat by liquid chromatography-tandem mass spectrometry (2023)
Journal Article

A liquid chromatography-tandem mass spectrometry screening method in sweat was developed for the simultaneous determination of three licit drugs (nicotine, paracetamol, and caffeine); four illicit drugs (cocaine, ketamine, 25I-NBOMe and methamphetami... Read More about Determination of licit and illicit drugs and metabolites in human sweat by liquid chromatography-tandem mass spectrometry.

Graphene-based electrodes for monitoring of Estradiol (2023)
Journal Article

This study explores the potential use of graphene-based electrodes in the electrochemical determination of estradiol using amperometric techniques as a simple, enzyme-free approach. Graphene, a carbon-based nanomaterial, has been extensively investig... Read More about Graphene-based electrodes for monitoring of Estradiol.

An electrochemical screen-printed sensor based on gold-nanoparticle-decorated reduced graphene oxide–carbon nanotubes composites for the determination of 17-β estradiol (2023)
Journal Article

In this study, a screen-printed electrode (SPE) modified with gold-nanoparticle-decorated reduced graphene oxide–carbon nanotubes (rGO-AuNPs/CNT/SPE) was used for the determination of estradiol (E2). The AuNPs were produced through an eco-friendly me... Read More about An electrochemical screen-printed sensor based on gold-nanoparticle-decorated reduced graphene oxide–carbon nanotubes composites for the determination of 17-β estradiol.

Smartphone-based colorimetric determination of gamma-butyrolactone and gamma hydroxybutyrate in alcoholic beverage samples (2023)
Presentation / Conference Contribution

amma-hydroxybutyrate (GBH) is a popular recreational drug. Its strong sedative and amnesic effects have led to drug-facilitated sexual assaults, poisonings, overdose, and death. As a result, legislation has restricted its availability leading to GHB,... Read More about Smartphone-based colorimetric determination of gamma-butyrolactone and gamma hydroxybutyrate in alcoholic beverage samples.

Applications of nanosensor technology for the plant sciences (2022)
Digital Artefact

The detection of analytes is optically difficult in planta due to tissue thickness and the presence of photosynthetic pigments in plant tissues. Nanosensors are well-suited for the detection of analytes as they are easily embedded in plant tissues. T... Read More about Applications of nanosensor technology for the plant sciences.

A literature survey of volatiles from human breath and bodily fluids: The human volatilome and its potential use in forensic science (2022)
Presentation / Conference Contribution

The measurement of volatile compounds, or indeed semi-volatile compounds from a crime scene, or from a person could have applications in forensics science, these volatiles could arise from the body or by being adorned e.g. by use of perfumes etc. Rec... Read More about A literature survey of volatiles from human breath and bodily fluids: The human volatilome and its potential use in forensic science.

Application of head space gas chromatography mass spectrometry (HS-GCMS) to determine fragrances transferred between fabrics with varying force of contact (2022)
Presentation / Conference Contribution

In recent years, offenders have become more forensically aware; leading to the need for the development of new and novel evidence types. One such potential evidence type that we believe deserves further investigation is that of fragrance transfer. Lo... Read More about Application of head space gas chromatography mass spectrometry (HS-GCMS) to determine fragrances transferred between fabrics with varying force of contact.

Nanosensor applications in plant science (2022)
Journal Article

Plant science is a major research topic addressing some of the most important global challenges we face today, including energy and food security. Plant science has a role in the production of staple foods and materials, as well as roles in genetics... Read More about Nanosensor applications in plant science.

Voltammetric behaviour of Rhodamine B at a screen-printed Carbon electrode and its trace determination in environmental water samples (2022)
Journal Article

The voltammetric behaviour of Rhodamine B was studied at a screen‐printed carbon electrode (SPCE), by cyclic and differential pulse voltammetry. Cyclic voltammograms exhibited two reduction peaks (designated R1 and R2) generated from the reduction of... Read More about Voltammetric behaviour of Rhodamine B at a screen-printed Carbon electrode and its trace determination in environmental water samples.