DiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and Equipment
Mercury IsotopesMercuryMercury PoisoningIsotopesMercury CompoundsIsotope LabelingNitrogen IsotopesOxygen IsotopesMethylmercury CompoundsCarbon IsotopesMercury Poisoning, Nervous System
Stable isotopeDilutionMulti-isotope approachCarbonFractionationMass SpectrometryRadioactive isotopeRatiosSedimentsConcentrationsAnalysesPathwaysMeasurementSeleniumElemental mercury2022OccurrenceAnthropogenicVolcanicMethylmercuryTotal mercuryHumansEmissions2019DepositionBioaccumulationMethodsAnalysisHazardousUrineDecayMeHgConcentrationMethylOrbitsCompositionDynamicsLevelsFacilityMixtureCyclingChlorineDepthMaternalElementDataCompounds
Stable isotope8
  • Stable isotope (N, C, Hg) study of methylmercury sources and trophic transfer in the northern gulf of Mexico. (harvard.edu)
  • We quantified the stable isotope ratios of carbon (δ 13 C) and nitrogen (δ 15 N) as well as the total mercury (Hg) concentration in muscle samples from 20 common minke whales ( Balaenoptera acutorostrata ) stranded along the coast of Hokkaido, Japan. (aquaticmammalsjournal.org)
  • A high temperature furnace system was newly installed for a He continuous flow isotope ratio mass spectrometer (CF-IR-MS) for the analysis of oxygen stable isotope compositions in solid samples, especially those of phosphate, sulfate and carbonate, whose isotope compositions are currently difficult to determine. (nii.ac.jp)
  • We aim to establish stable isotope studies to infer such trigger events that may affect human migrations and civilizations. (nii.ac.jp)
  • We provide evidence from stable isotope analyses that this high variability is due to feeding ecology. (usgs.gov)
  • A multi-biomarker approach supports the use of compound-specific stable isotope analysis of amino acids to quantify basal carbon source use in a salt marsh consumer. (lsu.edu)
  • Intraspecific variation in a dominant prey species can bias marine predator dietary estimates derived from stable isotope analysis. (lsu.edu)
  • Evaluating the use of stable isotope analysis to infer the feeding ecology of a growing US gray seal (Halichoerus grypus) population. (lsu.edu)
Dilution7
  • Zhang Y, Wang Q, Zhang G, Jia W, Ren Y, Wu Y. Biomarker analysis of hemoglobin adducts of acrylamide and glycidamide enantiomers for mid-term internal exposure assessment by isotope dilution ultra-high-performance liquid chromatography tandem mass spectrometry. (cdc.gov)
  • Hielscher J, Monien BH, Abraham K, Jessel S, Seidel A, Lampen A. An isotope-dilution UPLC-MS/MS technique for the human biomonitoring of the internal exposure to glycidol via a valine adduct at the N-terminus of hemoglobin. (cdc.gov)
  • New high-accuracy isotope dilution mass spectrometric analytical methods have been developed for the measurement of mercury and chlorine in complex matrix materials. (nist.gov)
  • Paulsen, P. J. and Kelly, W. R., Determination of Sulfur as Arsenic Mono-sulfide Ion by Isotope Dilution Thermal Ionization Mass Spectrometry , Anal. (nist.gov)
  • Kelly, W. R. and Paulsen, P. J., Precise and Accurate Determination of High Concentrations of Sulfur by Isotope Dilution Thermal Ionization Mass Spectrometry , Talanta, 31:1063-1068 (1984). (nist.gov)
  • Pre-diagnostic serum samples that were collected on average nine years before PTC diagnosis were used to measure PCB congeners by gas chromatography isotope dilution high resolution mass spectrometry (GC/ID-HRMS). (cdc.gov)
  • Determination of 3-quinuclidinyl benzilate (QNB) and its major metabolites in urine by isotope dilution gas chromatography/mass spectrometry. (cdc.gov)
Multi-isotope approach1
  • In this project, we aim to establish multi-isotope approach for such materials. (nii.ac.jp)
Carbon4
  • Combined analyses of mercury, nitrogen, and carbon isotopes in archived lake trout (Salvelinus namaycush) tissues and sediment cores in Lake Michigan from 1978 to 2012 indicated that lake trout mercury concentrations mirrored declines in mercury sources prior to the arrival of invasive species that changed mercury transfer through the food and dampened the expected decreases in mercury. (usgs.gov)
  • Stable isotopes of carbon (δ13C), sulfur (δ34S), oxygen (δ18O), hydrogen (δ2H), nitrogen (δ15N), and radioactive isotope of hydrogen (tritium) have been applied in combination with conventional techniques (chemical) to investigate Karachi coastal water pollution due to Layari and Malir rivers, which mainly carry the domestic and industrial wastewater of Karachi Metropolitan. (intechopen.com)
  • Stable carbon and nitrogen isotope ratios (δ 13 C/δ 15 N) in the bone collagen and other hard tissues of marine species serve as proxies for primary productivity and food web interactions. (frontiersin.org)
  • Sulfur, mercury, and carbon are (or will likely be) subject to environmental regulations. (nist.gov)
Fractionation1
  • Applications include water and its mixtures with common gases (important for humidity standards, combustion gases, and CO 2 sequestration), higher virial coefficients of helium and argon (important in metrology), correcting gas-saturation vapor pressure measurements for deviation from ideal-gas behavior, estimation of the enhancement of mercury vaporization by air, and molecular calculation of diffusive fractionation of water isotopes in air for atmospheric and climate science. (nist.gov)
Mass Spectrometry1
  • Whole blood lead (Pb), cadmium (Cd), and toal mercury (THg) concentrations are determined using inductively coupled plasma mass spectrometry. (cdc.gov)
Radioactive isotope1
  • Besides the online production of the desired radioactive isotope, extraction and post-accelerating (so-called ISOL technique, carried out for instance at CERN ISOLDE or CYCLONE at the CRC/UCL), also offline technology by use of an ECR source is applied. (psi.ch)
Ratios1
  • Biogeochemical analysis of total mercury (tHg) and δ 13C/δ15N ratios in the bone collagen of archeologically recovered Pacific Cod ( Gadus macrocephalus ) bone shows high levels of tHg during early/mid-Holocene. (frontiersin.org)
Sediments2
  • An international team of scientists, including UConn Department of Earth Sciences researchers Professor and Department Head Tracy Frank and Professor Christopher Fielding, are working to understand the cause and how the events of the LPME unfolded by focusing on mercury from Siberian volcanoes that ended up in sediments in Australia and South Africa. (sflorg.com)
  • Janssen, S.E., M.W. Johnson, J.D. Blum, T. Barkay, and J.R. Reinfelder (2015) Separation of monomethylmercury from estuarine sediments for mercury isotope analysis. (rutgers.edu)
Concentrations8
  • Elevated Mercury Concentrations and Isotope Signatures (N, C, Hg) in Yellowfin Tuna (Thunnus albacares) from the Galápagos Marine Reserve and Waters off Ecuador. (harvard.edu)
  • Mercury Stable Isotopes Reveal Influence of Foraging Depth on Mercury Concentrations and Growth in Pacific Bluefin Tuna. (harvard.edu)
  • Human exposure to methylmercury (MeHg) and elemental mercury vapor (Hg(0)(g)) are often estimated using total Hg concentrations in hair and urine, respectively. (cdc.gov)
  • Mercury concentrations in eggs (mean 84 ng? (usgs.gov)
  • Ammocoetes had high mercury concentrations for their trophic level (e.g., mean of age-4 ammocoetes 492 ng? (usgs.gov)
  • Concentrations of mercury decreased during metamorphosis from ammocoete to adult. (usgs.gov)
  • Mercury concentrations in adults ranged from 83 to 942 ng? (usgs.gov)
  • The Convention's effectiveness in lowering (i) mercury emissions, (ii) environmental concentrations of mercury and ultimately (iii) human exposure to mercury will have to be evaluated. (institut-polaire.fr)
Analyses2
  • Below, you can find information about our isotope analyses. (alsglobal.se)
  • Sensitivity analyses were performed to control for maternal lead and mercury at delivery. (cdc.gov)
Pathways1
  • Mercury isotope study of sources and exposure pathways of methylmercury in estuarine food webs in the Northeastern U.S. Environ Sci Technol. (harvard.edu)
Measurement2
  • In the past, the measurement of sulfur in fuels and combustion systems has received principal attention, but mercury emissions are now attracting regulatory interest because of the potential risk to human health. (nist.gov)
  • During my first year as a graduate student, we worked on a measurement of the isotope shift and hyperfine structure of mercury isotopes. (allgreatquotes.com)
Selenium1
  • Selenium and stable mercury isotopes provide new insights into mercury toxicokinetics in pilot whales. (harvard.edu)
Elemental mercury1
20222
  • However, given that a costly step of isotope separation would have to precede the already costly process of transmutation, this has (as of 2022) mostly remained a theoretical curiosity rather than an actual area of research. (wikipedia.org)
  • The first scientific measurements in the vicinity of Mercury were successfully collected with the Bepi Colombo instruments during three flybys at the planet in 2022 and 2023. (mpg.de)
Occurrence3
  • The occurrence of mercury and its toxic derivatives is considered one of the many negative impacts of oil and gas operations. (researchgate.net)
  • This study examines the occurrence, exposure, and symptoms of mercury on the health and safety of oil and gas workers in Oman. (researchgate.net)
  • Five species of fish-including the Mariana Trench snailfish, the world's deepest known fish newly discovered-were analyzed for patterns in total element concentration, depth of occurrence, Se:Hg ratio, plus mercury isotopes in the deepest species. (bvsalud.org)
Anthropogenic2
  • Combusted hydrocarbons are identified as major anthropogenic sources of mercury emissions to the atmosphere in the United States. (researchgate.net)
  • Thanks to recent measurements during several oceanographic expeditions, among them GEOTRACES cruises, estimates of the total amount and spatial distribution of anthropogenic mercury in the global ocean were substantially improved. (geotraces.org)
Volcanic3
  • In this case, the smoking gun the researchers focused on was mercury, one of the heavy metals associated with volcanic eruptions. (sflorg.com)
  • It turns out that volcanic emissions of mercury have a very specific isotopic composition of the mercury that accumulated at the extinction horizon. (sflorg.com)
  • A new study used fossils and mercury isotopes from volcanic gas deposited in ancient proto-Pacific Ocean sediment deposits in Nevada to determine when life recovered following the end-Triassic mass extinction 201.5 million years ago. (sciencedaily.com)
Methylmercury2
  • Environmental Origins of Methylmercury Accumulated in Subarctic Estuarine Fish Indicated by Mercury Stable Isotopes. (harvard.edu)
  • Assessing sources of human methylmercury exposure using stable mercury isotopes. (harvard.edu)
Total mercury1
  • After the Mediterranean Sea one, don't miss the Arctic present-day total mercury mass balance! (geotraces.org)
Humans1
Emissions2
  • In 2017, the Minamata Convention has come into force, which aims to limit the use, emissions and health impacts of mercury globally. (institut-polaire.fr)
  • A certification system has been implemented to provide traceability infrastructure for electric utility mercury emissions monitoring. (nist.gov)
20191
Deposition2
  • Whole-ecosystem study shows rapid fish-mercury response to changes in mercury deposition. (harvard.edu)
  • 20 Mercury deposition in operational tools and equipment presents significant health and safety risks to maintenance or inspection workers. (researchgate.net)
Bioaccumulation1
  • Here we suggest how past climate change and coastal flooding are linked to mercury bioaccumulation that could have had profound impacts on past human populations and that, under conditions of continued climate warming, may have future impacts. (frontiersin.org)
Methods2
  • Methods: The two-pronged approach of literature review and survey questionnaire was used to deduce the effects of mercury exposure and poisoning using 68 respondents with 1 - 6 years of working experience in the sector. (researchgate.net)
  • As a starting point, geologists have pinpointed the timing of the major extinction event at 251.9 million years with a high degree of precision from radiogenic isotope dating methods. (sflorg.com)
Analysis4
  • There are several mercury species present in crude oil and gas condensates that are seldom accounted for in routine analysis. (researchgate.net)
  • Analysis and interpretation of existing data from the former MESSENGER mission to Mercury and data from the first flybys of BepiColombo at Mercury. (mpg.de)
  • While colleagues did the mercury analysis, Ritterbush collected rocks and analyzed ancient sea sponges. (sciencedaily.com)
  • Mercury relative isotope analysis showed no depth trends in the deepest species. (bvsalud.org)
Hazardous1
  • 20, 21 However, mercury is not only hazardous to human health but also detrimental to gas processes and equipment. (researchgate.net)
Urine1
  • Mercury in urine therefore represents a mixture of demethylated fish-derived MeHg and amalgam-derived inorganic Hg. (cdc.gov)
Decay2
  • All isotopes of mercury are either radioactive or observationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed. (wikipedia.org)
  • These isotopes are predicted to undergo either alpha decay or double beta decay. (wikipedia.org)
MeHg2
  • However, the respondents who experienced methyl mercury (MeHg) symptoms are due to consuming seafood and cigarettes, whereas elemental and organic mercury symptoms are due to oil and gas operations. (researchgate.net)
  • We investigated whether Hg stable isotopes could be used to better distinguish between exposure to Hg(0)(g) versus MeHg. (cdc.gov)
Concentration1
  • 1 Furthermore, studies have shown that the exposure of oil and gas workers to high levels of mercury could result in acute and chronic illnesses depending on the type, concentration, and exposure duration of mercury. (researchgate.net)
Methyl3
  • Results: Based on the questionnaire response rate of 72%, the results showed that over 90% of participants had experienced symptoms of elemental, organic, and methyl mercury poisoning. (researchgate.net)
  • Uncertainties exist regarding levels of exposure to methyl mercury from fish consumption and potential health effects resulting from this exposure. (cdc.gov)
  • Past estimates of exposure to methyl mercury have been obtained from results of food consumption surveys and measures of methyl mercury in fish. (cdc.gov)
Orbits2
  • In the mid-19th-century, accurate observations showed that the orbits of two planets, Mercury and Uranus, were anomalous. (3quarksdaily.com)
  • After injection into separate Mercury orbits, both spacecraft will continuously investigate the planet's plasma environment beginning in early 2026. (mpg.de)
Composition1
  • What is different about this paper is we looked not only at mercury, but the isotopic composition of the mercury from samples in the high southern latitudes, both for the first time. (sflorg.com)
Dynamics1
  • We examined the ontogenetic dynamics of mercury accumulation in sea lamprey (Petromyzon marinus) from the Connecticut River, USA. (usgs.gov)
Levels4
  • 25 Similarly, studies have shown that maintenance and inspection workers in oil and gas operations are exposed to high levels of mercury and its related compounds through inhalation and dermal absorption, which poses grave risks to their health and safety. (researchgate.net)
  • 26 According to another study, the risk of mercury is due to various factors ranging from the underestimation of the exact levels of mercury to lack of routine protocols for the monitoring, detection, and quantification of the contaminant particularly in liquid hydrocarbons. (researchgate.net)
  • The study's results hold promise that the implementation of anti-pollution measures under the Minamata Convention will likely result in a faster decrease of oceanic mercury levels than previously thought. (geotraces.org)
  • Blood mercury levels will be assessed in two subpopulations particularly vulnerable to the health effects from mercury exposure: children 1-5 years old and women of childbearing age. (cdc.gov)
Facility1
  • The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. (lu.se)
Mixture1
Cycling1
Chlorine1
  • All of the coal SRMs are now certified for mercury, and three of them for chlorine. (nist.gov)
Depth1
  • While there have been several studies in various locations analyzing such elements in fish, few have investigated patterns in these elements and their isotopes in terms of ocean depth, and none have studied the greatest depth zones. (bvsalud.org)
Maternal1
  • There was a higher rate of maternal transfer of mercury to eggs compared with teleosts. (usgs.gov)
Element3
  • Stable mercury atoms that have the same atomic number as the element mercury, but differ in atomic weight. (harvard.edu)
  • To see the isotopes that exist in the ScientificConstants package for a particular element, use the GetIsotopes function with the 'element' option specified. (maplesoft.com)
  • The mass spectrometer permits detection of ions at each mass-to-charge ratio in rapid sequence, allowing individual isotopes of an element to be determined. (cdc.gov)
Data2
  • Click any isotope in diagram to see its data. (periodictable.com)
  • Shen was able to analyze the mercury isotopes in the samples and tie all the data together, says Frank. (sflorg.com)
Compounds2