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From Breaking Bad to Breaking Bonds-Mass Spectrometry in the Classroom.
Rapid Commun Mass Spectrom
January 2025
School of Chemical Sciences, University of Hertfordshire, Hatfield, UK.
We describe a workshop that prompts chemistry students in the final 2 years of secondary school to apply their understanding of modern analytical chemistry techniques to a 'real world' example. The scenario used is that of a forensic science laboratory that has been asked to determine the structure of an illicit compound, Revisomed (methamphetamine) being sold as a revision aid, and seized by police. Over the course of an hour, the students use a combination of infrared (IR) spectroscopy, liquid chromatography (LC), high-resolution mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy data to determine the structure of Revisomed from first principles.
View Article and Find Full Text PDFACCUMULATION OF TRACE ELEMENTS IN SOIL AND FAUNA WITHIN A SITE HISTORICALLY CONTAMINATED WITH COAL COMBUSTION RESIDUES.
Environ Toxicol Chem
January 2025
Savannah River Ecology Lab, University of Georgia, Aiken, SC, USA.
Legacy contaminants tied to energy production are a worldwide concern. Coal combustion residues (CCRs) contain high concentrations of potentially toxic trace elements such as arsenic (As), mercury (Hg), and selenium (Se), which can persist for decades after initial contamination. CCR disposal methods, including aquatic settling basins and landfills, can facilitate environmental exposure through intentional and accidental releases.
View Article and Find Full Text PDFProvenance of late Pleistocene loess in central and eastern Europe: isotopic evidence for dominant local sediment sources.
Sci Rep
January 2025
Geochronology and Tracers Facility, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK.
Loess profiles along the Danube River provide a record of long-term Quaternary dust (loess) deposition in central-eastern Europe. Here, Sr-Nd isotopic data from four loess-palaeosol profiles (47 samples) spanning the last two-glacial-interglacial cycles are presented. The isotopic compositions generated by this study are compared with bedrock and sedimentary samples from Europe and North Africa to decipher the sources of sediment.
View Article and Find Full Text PDFThree Years of Stable Water Isotope Data of Daily Rain Samples Collected from Three Geomorphic Regions of India.
Sci Data
December 2024
Centre for Climate Change Research, Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, Pune, India.
High-frequency precipitation (solid/liquid) isotope datasets are useful for identification of moisture sources and various dynamical and thermodynamical processes controlling precipitation formation. Here, we report three-year (2019-2021) daily rain isotope (both oxygen, δO hereafter, and hydrogen, δH, hereafter) datasets from three unique locations in India during the Indian Summer Monsoon (ISM). The locations are- (1) Port Blair- an island situated in the Bay of Bengal (BoB); (2) Mahabaleshwar, located at the crest of the Western Ghats Mountain; and (3) Tezpur, in northeast India, situated close to a dense forest.
View Article and Find Full Text PDFAn integrated approach to coupled nutrient and microbial source tracking in an agricultural watershed.
Water Res
December 2024
Formerly U.S. Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment, retired, United States.
Estuaries often experience multiple water quality impairments including nitrogen enrichment and elevated fecal pollution. These pollutant sources are often linked and difficult to characterize, especially in multiple use watersheds, hindering the identification of effective mitigation steps. Tillamook Bay (Oregon, USA) has a mixed-use watershed including many potential nutrient and fecal bacteria sources due to agricultural activities, human development, and local wildlife populations.
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