Picture offshore wind farm

Open Access: World leading research into plasma physics...

Strathprints makes available scholarly Open Access content by researchers in the Department of Physics, including those researching plasma physics.

Plasma physics explores the '4th' state of matter known as 'plasma'. Profound new insights are being made by Strathclyde researchers in their attempts to better understand plasma, its behaviour and applications. Areas of focus include plasma wave propagation, non-linear wave interactions in the ionosphere, magnetospheric cyclotron instabilities, the parametric instabilities in plasmas, and much more.

Based on the REF 2014 GPA Scores, Times Higher Education ranked Strathclyde as number one in the UK for physics research.

Explore Open Access plasma physics research and of the Department of Physics more generally. Or explore all of Strathclyde's Open Access research...

Electrochemiluminescent detection of methamphetamine and amphetamine

McGeehan, Jonathan and Dennany, Lynn (2016) Electrochemiluminescent detection of methamphetamine and amphetamine. Forensic Science International, 264. pp. 1-6. ISSN 0379-0738

[img]
Preview
Text (McGeehan-Dennany-FSI2016-electrochemiluminescent-detection-methamphetamine)
McGeehan_Dennany_FSI2016_electrochemiluminescent_detection_methamphetamine.pdf
Accepted Author Manuscript
License: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 logo

Download (926kB) | Preview

Abstract

Direct detection of amphetamine type stimulants (ATS) including methylamphetamine (MA) in street samples and biological matrices without the need for pretreatment or extraction is a great challenge for forensic drug analysis. Electrochemical techniques, such as electrochemiluminescence (ECL), are promising tools for this area of analysis. This contribution focuses on the electrochemical and photochemical properties of [Ru(bpy)3]2+ nafion composite films and their subsequent use for the detection of ATS in particular MA. Under optimised conditions, the response linearly increased with the concentration over the concentration range 50 pM <[MA]< 1 mM while an equivalent dynamic range was obtained for amphetamine with a correlation coefficient of 0.9903 and 0.9948 respectively. The ECL signal was monitored at ~620 nm, representing the λmax for the [Ru(bpy)3]2+ nafion composite films. This wavelength is shifted by approximately 15 nm compared to the photoexcited λmax for the same system. The modified films were formed by direct interaction with the electrode surface without the need for surface modification or chain linkers. This is a major advantage for the fabrication of any sensor as it reduces the synthesis times resulting in more economically and cheaper production costs. This technique is simple, rapid, selective and sensitive, and shows potential for the high-throughput quantitation of ATS as well as possibilities for adaptation with other techniques such as FIA or LC systems.