toxicity analyzer Articles
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Function 3
The LeakTracker handset was introduced somewhere in the mid 90's. It was a big deal since it allowed direct read of the instrument reading and saved the technician some typing. It also meant the exact, reading could be captured. It was also supposed to be "cheater proof" by forcing the technician to scan a bar coded tag in order to start the monitoring process. None of these feature by ...
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Heavy metals, PAHs and toxicity in stormwater wet detention ponds
Concentrations of 6 different heavy metals and total polycyclic aromatic hydrocarbons (PAHs) were determined in stormwater runoff and in the pond water of two Danish wet detention ponds. The pond water samples were analyzed for toxic effects, using the algae Selenastrum capricornutum as a test organism. Stormwater and pond water from a catchment with light industry showed high levels of heavy ...
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Metal mixtures modeling evaluation: 1. Background
Despite more than five decades of aquatic toxicity tests conducted with metal mixtures, there is still a need to understand how metals interact in mixtures and to predict their toxicity more accurately than currently is done. This paper provides a background for understanding the terminology, regulatory framework, qualitative and quantitative concepts, experimental approaches, and ...
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How do humans impact cyanobacteria thousand years ago?
We often look at how algae affect humans. Whether by analyzing how toxic blooms harms us or by looking at the health benefits of including edible ones in our diets, countless areas benefit from a good understanding of the different kinds of algae. However, a recent study looks at the issue from a flipped perspective: how do humans affect cyanobacteria? Cyanobacteria are a type of photosynthetic ...
By LG Sonic
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Extrapolation of acute toxicity across bee species
In applying cross‐species extrapolation safety factors from honeybees to other bee species, some basic principles of toxicity have not been included, e.g. the importance of body mass in determining a toxic dose. This study re‐analysed published toxicity data taking into account the reported mass of the individuals in the identified species. The analysis demonstrated a shift to the left in the ...
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Assessing the Impact of Atmospheric Wet and Dry Deposition using Chemical and Toxicological Analysis
Abstract :Chemical analyses and toxicity test results for atmospheric wet and dry deposition from 5 sampling sites in Greece are presented in this study. In most of the samples examined, the heavy metals content of the filtered water samples was relatively low. There was quite a high concentration of amorphous sulphur and carbon in the solid particles of the deposition. Beta radiation level was ...
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Identification of compounds in heavy fuel oil that are chronically toxic to rainbow trout embryos by effects‐driven chemical fractionation
This research isolated and identified compounds in heavy fuel oil 7102 (HFO 7102) that are bioavailable and chronically toxic to rainbow trout embryos (Oncorhynchus mykiss). An effects‐driven chemical fractionation combined the chemical separation of oil with toxicity testing and chemical analyses of each fraction to identify the major classes of compounds associated with embryo toxicity. ...
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Assessing toxicity of contaminants in riverine suspended sediments to freshwater mussels
The Clinch River in Virginia and Tennessee, USA, is well known for its diverse native freshwater mussel assemblages; however, notable declines in mussel populations in recent decades have prompted much concern and subsequent research. The authors examined the toxicity of recently‐deposited sediments on juveniles of the freshwater mussel Epioblasma brevidens, by collecting time‐integrated ...
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Toxicity Studies of Treated Residual Wastes in Austria using Different Types of Conventional Assays and Cost-Effective Microbiotests
Abstract : The toxicity and chemical quality of 12 mechanically-biologically treated residual wastes were studied during different treatment periods. Acute and chronic bioassays were carried out with a battery of test organisms. The acute toxicity was assessed using Daphnia magna (crustacea) and Vibrio fischeri (luminescent bacteria). The chronic toxicity was tested with Selenastrum capricornutum ...
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US developments in the regulation of chemicals, pesticides and occupational safety
The US Environmental Protection Agency released the 2006 Toxics Release Inventory (TRI) data back in February. The TRI, created under the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA), requires certain facilities to report annually on their chemical releases and other waste management activities to EPA and the states. In addition, the Pollution Prevention Act of 1990 (PPA) ...
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Movement of toxic metals from small-scale industrial areas: a case study from Delhi, India
In India, an estimated 70% of the total industrial pollution load is attributed to Small and Medium Enterprises (SMEs). Among SMEs, small-scale industries continue to use obsolete technologies with no stringent rules for pollution control. Consequently, waste generated from them is generally dumped without treatment. These facts are strengthened from the analysis conducted on solid waste and ...
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Electrochemical oxidation of wastewater containing aromatic amines using a flow electrolytic reactor
Aromatic amines are environmental pollutants and represent one of the most important classes of industrial and natural chemicals. Some types of complex effluents containing these chemical species, mainly those originated from chemicals plants are not fully efficiently treated by conventional processes. In this work, the use of electrochemical technology through an electrolytic pilot scale flow ...
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On-line measurements of flue gas concentrations of cadmium and lead in a co-combustion in a fluidized bed boiler
ABSTRACT The operation of a new on-line toxic metal analyser was demonstrated in connection to a pilot-scale bubbling fluidised bed boiler during co-combustion tests of biomass and waste fuels. The analyser comprises a novel continuous sampling device combined with DC-plasma excited atomic absorption spectroscopy and Zeeman background correction. A continuous sample gas flow is extracted from a ...
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Monitoring the aquatic toxicity of mosquito vector control spray pesticides to freshwater receiving waters
Pesticides are applied to state and local waterways in California to control insects such as mosquitoes, which are known to serve as a vector for West Nile Virus infection of humans. The California State Water Resources Control Board adopted a National Pollutant Discharge Elimination System General Permit to address the discharge of pesticides to waters of the United States resulting from ...
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Ultrapure Water for Determination of Toxic Elements in Environmental Analyses
Abstract In this paper the importance of reagent water quality for toxic element environmental analyses is discussed, and the suitability of fresh ultrapure water produced using Merck water purification systems for ICP-OES and ICP-MS trace element analyses in environmental laboratories is demonstrated. Key words or phrases Trace elements, metals, toxic elements, ICP-MS, ICP-OES, contamination, ...
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Department of Groundwater Resources - Thailand - Case Study
A long time customer of Tecta-PDS, they now have x15 Tecta-B16 instruments installed. The units are used for remote monitoring of groundwater resources around Thailand, compared to previously taking samples from around the country and sending them to the main cities for analysis. The Groundwater Analysis Division at the Department of Groundwater Resources for Thailand has quite a mandate! ...
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Ensuring your employees workplace air quality is safe
Somewhere in the world, someone is exposed to hazardous gases without their knowledge every single day. This can happen in a factory or laboratory, when storing goods or unloading a freight container. GT5000 Terra is a tool for measuring dangerous or toxic gases. With the FTIR analyzer, you will immediately know what is in the air. The analysis can be completed directly in the workplace. ...
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Ensuring your employees` workplace air quality is safe
Somewhere in the world, someone is exposed to hazardous gases without their knowledge every single day. This can happen in a factory or laboratory, when storing goods or unloading a freight container. GT5000 Terra is a tool for measuring dangerous or toxic gases. With the FTIR analyzer, you will immediately know what is in the air. The analysis can be completed directly in the workplace. ...
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Bridging environmental mixtures and toxic effects
The Biological Response Indicator Devices Gauging Environmental Stressors (BRIDGES) is a bioanalytical tool that combines passive sampling with the embryonic zebrafish developmental toxicity bioassay to provide a quantitative measure of the toxicity of bioavailable complex mixtures. Passive sampling devices (PSDs), which sequester and concentrate bioavailable organic contaminants from the ...
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