contaminant sampling Articles

  • A quick guide to oil analysis for engine test applications

    Reliability testing is a very important component of new engine development. Engineers need to fully understand and chart the engine lifetime performance under a variety of conditions before mass production may be considered. Many important performance data parameters are collected in real time through the many different types of sensors that are connected to the engine in the test cell and oil ...


    By Spectro Scientific

  • Passive sampling methods for contaminated sediments: State of the science for organic contaminants

    This manuscript surveys the literature on passive sampler methods (PSMs) used in contaminated sediments to assess the chemical activity of organic contaminants. The chemical activity in turn dictates the reactivity and bioavailability of contaminants in sediment. Approaches to measure specific binding of compounds to sediment components, e.g., amorphous carbon or specific types of reduced ...


    By John Wiley & Sons, Ltd.

  • Geostatistical Sampling Optimization and Waste Characterization of Contaminated Premises

    Abstract This methodological study presents a geostatistical approach suitable for radiological evaluation in nuclear premises. By modelling the spatial continuity of activities, geostatistics provide sound methods to estimate and map radiological activities, together with their uncertainty. The main geostatistical principles are first recalled and illustrated on a real premise ...


    By Geovariances

  • Mineral oil contamination in dry food samples

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in dry food samples Many food samples are contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibers. Other sources of contamination with mineral oils ...


    By BÜCHI Labortechnik AG

  • Passive sampling methods for contaminated sediments: Risk assessment and management

    This paper details how activity‐based passive sampling methods (PSMs), which provide information on bioavailability in terms of freely dissolved contaminant concentrations (Cfree), can be used to better inform risk management decision‐making at multiple points in the process of assessing and managing contaminated sediment sites. Because Cfree is a better predictor of bioavailability than total ...


    By John Wiley & Sons, Ltd.

  • Passive sampling methods for contaminated sediments: State of the science for metals

    It is generally accepted that “dissolved” concentrations of contaminants in sediment pore water (Cfree) provide a more relevant exposure metric for risk assessment than do total concentrations. Passive sampling methods (PSMs) for estimating Cfree offer the potential for cost‐efficient and accurate in situ characterization of Cfree for inorganic sediment contaminants. In contrast to the PSMs ...


    By John Wiley & Sons, Ltd.

  • Passive sampling methods for contaminated sediments: Practical guidance for selection, calibration, and implementation

    This manuscript provides practical guidance on the use of passive sampling methods (PSMs) that target the freely dissolved concentration (Cfree) for improved exposure assessment of hydrophobic organic chemicals in sediments. Primary considerations for selecting a PSM for a specific application include clear delineation of measurement goals for Cfree, whether laboratory‐based “ex‐situ” and/or ...


    By John Wiley & Sons, Ltd.

  • SupelMIP SPE for Sample Cleanup and Analysis of Food and Environmental Contaminants

    MIP SPE was successfully used for extraction of multiple classes of food and environmental contaminants from difficult matrices, such as egg, oil and flour. • Six nitroimidazoles were extracted from egg and milk with recoveries typically over 90%. • Among NSAIDs compounds, acidic compounds gave good recoveries between 100-115% while non-acidic compounds gave less desirable recoveries ...


    By MilliporeSigma

  • Passive sampling in contaminated sediment assessment: Building consensus to improve decision‐making

    Contaminated sediments pose an on‐going, pervasive, global challenge to environmental managers as sediments can reflect a legacy of pollution that can impair the beneficial uses of water bodies. A formidable challenge in assessing the risks of contaminated sediments has been elucidation and measurement of contaminant bioavailability, expressed as the freely dissolved concentration (Cfree) in ...


    By John Wiley & Sons, Ltd.

  • Monitoring Airborne Contaminants in Workplace Atmospheres, Using Sampling Devices and GC or HPLC

    Workers' exposure to hazardous substances must be held within acceptable limits. Therefore, airborne contaminant vapor and particles (including aerosols) in industrial atmospheres must be monitored. In the United States, the National Institute for Occupational Safety and Health (NIOSH) and the Occupational Safety and Health Administration (OSHA) offer, for many such substances, specific ...


    By MilliporeSigma

  • Contamination/Environmental case study

    Orlando Drum Company, Orlando, FL Facility washes and reconditions used drums Mercuri and Associates, Inc. was retained as hydrogeological consultant to verify state allegations of contamination of soil and ground water with heavy metals, pesticides, and volatile organic compounds. Initiated preliminary soil and groundwater sampling program, prepared/submitted ...


    By Mercuri & Associates, Inc.

  • Monitoring Metal Contamination in Water

    Metal contamination in drinking and source water has proven to have economic and health impacts on the human race. Regulatory agencies understand the importance of remediating metal contamination in our water supply to ensure safe consumption of drinking water. In order to properly remediate our water supplies, one must first determine cause of contamination and the source of the problem. ...


    By IWA Publishing

  • Mineral oil contaminations in cardboard

    SpeedExtractor E-916: Optimization of pressurized solvent extraction (PSE) for the rapid and efficient determination of MOSH and MOAH in cardboard Many food samples are often contaminated with mineral oil coming from different sources. One possible source of contamination is the migration from cardboard packaging made of recycled fibres. ...


    By BÜCHI Labortechnik AG

  • Bioremediating Explosives Contaminated Soil

    From the beginning of World War II until the 1970s, the site that is now the Naval Surface Warfare Center in Crane, Indiana (NSWC-Crane) was the home of a major bomb manufacturing operation. Explosive compounds such as TNT, Royal Demolition Explosives (RDX) and Her Majesty’s Explosive (HMX) were handled loose and drifted through air vents. Often, the material settled on the roofs of buildings, ...


    By BioCycle Magazine

  • Contaminated soil remediation - Inverurie

    Remove Contaminated Soil from Residential Gardens & Re-Landscape Client: MTM Construction Consultant: WA Fairhurst and Partners Challenge: Advise on the removal of contaminated material from a residential area built on a former town gas site. Reinstate existing landscaping. Applied ...


    By Soilutions Ltd

  • Technical Bulletin: Multilevel Sampling

    The topic of this CL:AIRE Technical Bulletin is multilevel sampling systems for characterising contaminated groundwater. Contaminated groundwater can present considerable problems for landowners: it can occur at significant depth, sources of the contamination are not often obvious, it can migrate from one property to another, and groundwater flow directions can be altered due to seasonal ...


    By Solinst Canada Ltd.

  • Understanding bioavailability and toxicity of sediment‐associated contaminants by combining passive sampling with in vitro bioassays in an urban river catchment

    Bioavailable and bioaccessible fractions of sediment‐associated contaminants are considered as better dose metrics for sediment‐quality assessment than total concentrations. The authors applied exhaustive solvent extraction and nondepletive equilibrium sampling techniques to sediment samples collected along the Brisbane River in South East Queensland, Australia, which range from pristine ...


    By John Wiley & Sons, Ltd.

  • Decontaminating Groundwater Sampling Devices

    These studies are the second part of a two year project that examines decontaminating groundwater sampling devices. In the first year, the efficiency of various decontamination protocols was tested using small test pieces of materials that are commonly used in groundwater sampling devices. Those tests showed that a hot detergent wash and rinse followed by hot air drying (105°C) was the most ...


    By QED Environmental Systems

  • Passive sampling methods for contaminated sediments: Scientific rationale supporting use of freely dissolved concentrations

    Passive sampling methods (PSMs) allow the quantification of the freely dissolved concentration (Cfree) of an organic contaminant even in complex matrices such as sediments. Cfree is directly related to a contaminant's chemical activity, which drives spontaneous processes including diffusive uptake into benthic organisms and exchange with the overlying water column. Consequently, Cfree provides ...


    By John Wiley & Sons, Ltd.

  • Review of polyoxymethylene (POM) passive sampling methods for quantifying freely‐dissolved pore water concentrations of hydrophobic organic contaminants

    Methods involving polyoxymethylene (POM) as a passive sampler are increasing in popularity to assess contaminant freely‐dissolved porewater concentrations in soils and sediments. These methods require contaminant‐specific POM‐water partition coefficients, KPOM. Specific methods for determining KPOM perform reproducibly (within 0.2 log units). However, different methods can lead to highly ...


    By John Wiley & Sons, Ltd.

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