The research was carried out by PhD student, Jonathan Bones, working under the supervision of Professor Brett Paull at DCU's National Centre for Sensor Research (NCSR) which specialises in sensor technology used in medical diagnostics, environmental monitoring and other industrial applications. The research was funded by the Irish Research Council for Science, Engineering and Technology.
Using a technique involving chromatography/mass spectrometry, a sample of 45 bank notes were analysed to show the level of contamination by cocaine. The cotton structure of the Euro bank notes adsorbs chemical residues, making it relatively easy to analyse. While all of the notes proved positive for cocaine contamination, three showed the presence of heroin. Contamination can occur whenever direct contact between the note and the drug takes place, either through the common practice of 'snorting' through a rolled-up banknote, as a result of transfer during drug dealing or through the cross-contamination of notes during the counting process in financial institutions.
62% of notes were contaminated with levels of cocaine at concentrations greater than 2 nanograms/note, with 5% of the notes showing levels greater than 100 times higher, indicating suspected direct use of the note in either drug dealing or drug inhalation. The highest amounts of cocaine residues were found on €20 and €50 bank notes, as compared to €5 and €10. The remainder of the notes which showed only ultra-trace quantities of cocaine was most probably the result of contact with other contaminated notes, which could have occurred within bank counting machines or from other contaminated surfaces.
"This is the largest sample of notes ever used in an experiment of this kind in Ireland", Bones said. "A larger number of notes would give a more representative view of cocaine use in our society, but the number used is sufficient from which to draw conclusions. The most recent survey carried out in the US showed 65% of dollar notes were contaminated with cocaine. However, the 100% rate uncovered in this project was surprising. Although not a quantitative measure, the presence of illicit substances on banknotes in general circulation provides an indication of the degree to which substances are being used by the community".
"The greatest advantage to using money as the test matrix is that it is readily available, non-invasive, anonymous and relatively safe to work with. Further research would need to be carried out to provide a more accurate picture of the scope of cocaine and heroin use in Ireland today", said Professor Brett Paull.
Shane Kenny | alfa
Programming cells with computer-like logic
27.07.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard
Identified the component that allows a lethal bacteria to spread resistance to antibiotics
27.07.2017 | Institute for Research in Biomedicine (IRB Barcelona)
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine