Enantiomeric resolution of methylamphetamine and ephedrine: Does this affect the δ13 C, δ15 N, and δ2 H stable isotope ratios of the product?
Sign Up to like & getrecommendations! Published in 2018 at "Drug testing and analysis"
DOI: 10.1002/dta.2409
Abstract: The use of stable isotope ratio mass spectrometry (IRMS) as a profiling tool for methylamphetamine has evolved over the last decade. Stable isotope ratios of carbon (δ13 C), nitrogen (δ15 N), and hydrogen (δ2 H)… read more here.
Keywords: resolution; ephedrine; methylamphetamine; isotope ratios ... See more keywords
Development of a sample preparation procedure for Sr isotope analysis of Portland cements
Sign Up to like & getrecommendations! Published in 2022 at "Analytical and Bioanalytical Chemistry"
DOI: 10.1007/s00216-021-03821-7
Abstract: The 87Sr/86Sr isotope ratio can, in principle, be used for provenancing of cement. However, while commercial cements consist of multiple components, no detailed investigation into their individual 87Sr/86Sr isotope ratios or their influence on the… read more here.
Keywords: sample preparation; portland; isotope ratios; 86sr isotope ... See more keywords
Foraging ecology of Mediterranean juvenile loggerhead turtles: insights from C and N stable isotope ratios
Sign Up to like & getrecommendations! Published in 2020 at "Marine Biology"
DOI: 10.1007/s00227-020-3647-5
Abstract: Bycatch is one of the key threats to juvenile marine turtles in the Mediterranean Sea. As fishing methods are regional or habitat specific, the susceptibility of marine turtles may differ according to inter- and intra-population… read more here.
Keywords: juvenile loggerhead; size; isotope ratios; foraging ecology ... See more keywords
Nutritional stress by means of high C:N ratios in the diet and starvation affects nitrogen isotope ratios and trophic fractionation of omnivorous copepods
Sign Up to like & getrecommendations! Published in 2019 at "Oecologia"
DOI: 10.1007/s00442-019-04438-5
Abstract: Nutritional stress, from feeding on low-quality diets or starvation, may cause changes in consumers’ nitrogen isotope ratios (δ15N = 15N/14N) and trophic fractionation (∆15N = δ15Nconsumer − δ15Nfood source), however, research has shown mixed results in the magnitude and the direction… read more here.
Keywords: nitrogen isotope; starvation; nutritional stress; isotope ratios ... See more keywords
Studying animal niches using bulk stable isotope ratios: an updated synthesis
Sign Up to like & getrecommendations! Published in 2020 at "Oecologia"
DOI: 10.1007/s00442-020-04654-4
Abstract: The development of the isotopic niche, an n -dimensional hypervolume (with n being the number of isotopes) occupied by a population in delta space, has revolutionized the study of animal interactions in wild populations. While… read more here.
Keywords: isotopic niche; bulk stable; isotope ratios; stable isotope ... See more keywords
Determination of lead isotope ratios in uranium mine products in South Africa by means of inductively coupled plasma mass spectrometry
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Radioanalytical and Nuclear Chemistry"
DOI: 10.1007/s10967-017-5641-z
Abstract: Nuclear terrorism has led to newer investigative methods for building national nuclear forensic libraries. The objective of this work was to resolve these signatures by applying the ICP-MS for isotope ratio (IR) analysis on uranium… read more here.
Keywords: lead isotope; isotope ratios; ratios uranium; mine ... See more keywords
Tracing the Origins of the Ice Giants Through Noble Gas Isotopic Composition
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DOI: 10.1007/s11214-020-00723-5
Abstract: The current composition of giant planet atmospheres provides information on how such planets formed, and on the origin of the solid building blocks that contributed to their formation. Noble gas abundances and their isotope ratios… read more here.
Keywords: building blocks; noble gas; ice giants; gas ... See more keywords
Using 206/207Pb isotope ratios to estimate phosphorus sources in historical sediments of a lowland river system
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Soils and Sediments"
DOI: 10.1007/s11368-020-02820-y
Abstract: Purpose Engineering and dredging strategies to manage sediment, along with river-scouring, can reveal older sediments. These present a unique opportunity to assess past sources of phosphorus (P) inputs into river sediments. We used the sediment… read more here.
Keywords: water; river; sources historical; lowland river ... See more keywords
Diet and mobility patterns in the Late Prehistory of central Iberia (4000–1400 cal bc): the evidence of radiogenic (87Sr/86Sr) and stable (δ18O, δ13C) isotope ratios
Sign Up to like & getrecommendations! Published in 2017 at "Archaeological and Anthropological Sciences"
DOI: 10.1007/s12520-017-0480-y
Abstract: This study examines strontium, oxygen, and carbon isotope ratios (87Sr/86Sr, δ18O, δ13C) in dental enamel and bone apatite from 82 individuals interred at Late Neolithic, Chalcolithic, and Bronze Age burial sites near Madrid, Spain, to… read more here.
Keywords: isotope; evidence; 87sr 86sr; isotope ratios ... See more keywords
Does sorption influence isotope ratios of chlorinated hydrocarbons under field conditions
Sign Up to like & getrecommendations! Published in 2017 at "Applied Geochemistry"
DOI: 10.1016/j.apgeochem.2017.07.016
Abstract: Abstract This study aims to investigate the effect of sorption on isotope ratios of chlorinated hydrocarbons migrating through the subsurface. For this purpose concentration and isotope ratio profiles (carbon and chlorine) were determined in saturated… read more here.
Keywords: isotope; field; sorption; isotope ratios ... See more keywords
The fate of Cu pesticides in vineyard soils: A case study using δ 65 Cu isotope ratios and EPR analysis
Sign Up to like & getrecommendations! Published in 2018 at "Chemical Geology"
DOI: 10.1016/j.chemgeo.2017.11.032
Abstract: Abstract Copper (Cu) based pesticides are widely used in viticulture and are permitted in organic viticulture. Due to its extensive long term use, Cu accumulates in vineyard soils and ecotoxicological implications are growing. In this… read more here.
Keywords: vineyard soils; study; isotope ratios; soil ... See more keywords