Mercury in the Environment Articles

235 Results found
  • Category: Health & Safety ×

  • Subcategory: Mercury in the Environment ×

What specification thermometers are available, and what are the differences?

by Camlab Limited  (Sep. 16, 2015)

Thermometers are used in most laboratories across all industries, and a wide range are available to suit any temperature monitoring task. For high accuracy applications that need to adhere to international standards, traditional glass specification thermometers are still the most popular choice. Specification thermometers are those which are ...

Mercury concentrations in different tissues of turtle and caiman species from the Rio Purus, Amazonas, Brazil

by John Wiley & Sons, Ltd.  (Sep. 20, 2015)

Total mercury (Hg) concentrations of muscle, liver, blood, and epidermal keratin were measured in typically consumed, economically and culturally important species of turtle (Podocnemis unifilis and Podocnemis expansa) and caiman (Melanosuchus niger and Caiman crocodilus) from the Rio Purus in the Amazon basin, Brazil. Methylmercury (MeHg) ...

Mercury and selenium accumulation in the Colorado River food web, Grand Canyon, USA

by John Wiley & Sons, Ltd.  (Aug. 19, 2015)

Mercury (Hg) and selenium (Se) biomagnify in aquatic food webs and are toxic to fish and wildlife. The authors measured Hg and Se in organic matter, invertebrates, and fishes in the Colorado River food web at sites spanning 387 river km downstream of Glen Canyon Dam (AZ, USA). Concentrations were relatively high among sites compared with other ...

Comparison of the CMVX-7100 Micro-Volume Workstation

by Teledyne CETAC Technologies  (Aug. 18, 2015)

Comparison of the CETAC MVX-7100 Micro-Volume Workstation with an Established Laboratory Method for the Assessment of Lead, Mercury, and Arsenic in Human Whole Blood. Conventional autosamplers used in clinical ICP-MS are largely based on the needs of non-clinical environments. Their disadvantages are numerous and include high ...

Methylmercury biomagnification in an Arctic pelagic food web

by John Wiley & Sons, Ltd.  (Aug. 14, 2015)

Mercury (Hg) is a toxic element that enters the biosphere from natural and anthropogenic sources, and emitted gaseous Hg enters the Arctic from lower latitudes by long‐range transport. In aquatic systems, anoxic conditions favor the bacterial transformation of inorganic Hg to methylmercury (MeHg), which has a greater potential for ...

Bolderwood Campus Southampton (2) – Case Study

by Envirochem Analytical Laboratories LTD  (Aug. 13, 2015)

Project Highlights Envirochem carried out broad spectrum radiological and chemical sampling within confined spaces to ascertain the extent of residual contamination within outlet drain sediments, constructional surfaces and nearby soils. Envirochem were able to draw together many different methods of access, sampling and analytical testing ...

Detecting Mercury in Water

by Arizona Instrument LLC  (Aug. 11, 2015)

Determination of Mercury (Hg) in Water by Hand-Held, Portable Cold Vapor Atomic Fluorescence SpectrometryWater is the most familiar and most abundant compound on Earth, making up 71% of its surface area.[1]It is a vital component for all known forms of life and is the aquatic habitat for thousands of species of microalgae, fish and shellfish. [2] ...

Application of diffusive gradients in thin films and core centrifugation methods to determine inorganic mercury and monomethylmercury profiles in sediment pore water

by John Wiley & Sons, Ltd.  (Aug. 6, 2015)

A diffusive gradient in thin films (DGT) is an in situ sampling technique for the quantitative analysis of contaminant concentrations that is based on the diffusion and adsorption of contaminants onto resin gels. In the current study, a DGT technique was applied to measure total mercury (Hg) and monomethylmercury (MMHg) concentrations in lake ...

Total and methylmercury partitioning between colloids and true solution: From case studies in sediment overlying and pore waters to a generalized model

by John Wiley & Sons, Ltd.  (Aug. 4, 2015)

Tangential flow ultrafiltration was used to determine the partitioning of total mercury (THg) and monomethyl‐mercury (MMHg) between colloids and true solution in sediment overlying (OW) and pore waters (PW) collected in Lake Geneva (Switzerland/France), Venice lagoon (Italy), and Baihua reservoir (China). Overlying water and PW spanned ...

The impacts of organic matter on the distribution and methylation of mercury in a hydroelectric reservoir in Wujiang River, Southwest China

by John Wiley & Sons, Ltd.  (Jul. 26, 2015)

In order to understand the impacts of organic matter on geochemical process of Hg in hydroelectric reservoir, spatial and seasonal distributions of total mercury (THg) and methylmercury (MeHg) both in solid and liquid phases of sediment cores were investigated in Wujiangdu Reservoir (WJD) in Guizhou province, China. Four sampling sites with ...

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