water sample Articles

  • Ground Water Sampling - A Workshop Summary

    Monitoring purposes have evolved in the past decade reflecting an increasing emphasis on assessment and remedial action performance over detection monitoring. The recognition of many potential contamination sources as well as the regulatory inclusion of a large number of sites in need of investigation have spurred this evolution in practice. New more efficient methods and tools for ...

  • Ground Water Sampling for Metal Analyses

    The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA’s Regional Superfund Offices, organized to exchange up-to-date information related to ground-water remediation at Superfund sites. Filtration of ground-water samples for metals analysis is an issue identified by the Forum as a concern of Superfund decisionmakers. Inconsistency in EPA Superfund ...

  • Sample Coolers

    Sample Coolers, originally developed in association with the CEGB, have been the industry standard for many years in nearly all Uk Power Stations and with UK Plant builders for both UK and overseas projects. The performance and reliability remain unsurpassed. Ever concious of changing markets, Lowe Engineering have the largest selection of sample coolers for mant varying applications, whilst ...


    By Lowe Engineering Limited

  • Reducing NOx in Diesel Emissions | Spectroscopy Solutions

    Air pollution and NOx emissions from diesel engines are a global concern due to their potential impacts on human health. Researchers worldwide are developing new and improved methods to reduce NOx emissions. Infrared spectroscopy in the gas phase, which is made possible using FTIR gas cells from Specac, has an important role to play in this ...


    By Specac Limited

  • Increased sample throughput for ICP-OES on drinking water and waste water

    The application of an SC-FAST sample introduction system to the analysis of natural and certified water samples is described. The SC-FAST system consists of an autosampler, sample loop, switching valve, high efficiency nebulizer and a glass cyclonic spray chamber to perform analysis by direct nebulization. The potential benefits of this introduction system are numerous and include: increased ...


    By PerkinElmer, Inc.

  • Low-Flow (Mininimal Drawndown) Ground-water Sampling

    The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA's Regional Superfund Offices, organized to exchange information related to ground-water remediation at Superfund sites. One of the major concerns of the Forum is the sampling of ground water to support site assessment and remedial performance monitoring objectives. This paper is intended to provide ...


    By GeoPump, Inc.

  • Monitoring of Hydrogen Sulfide in Industrial Processes

    Hydrogen sulfide, H2S, is a very poisonous, corrosive, and flammable gas. As such, it needs to be carefully monitored and controlled in industrial processes where it is generated or used. At relatively low concentrations, it has an odour of rotten eggs which effectively works as a warning, but at higher concentrations where it becomes acutely toxic and even lethal, it can no longer be smelled ...


    By Opsis AB

  • Pure water pH measurement in low conductivity samples

    Normally, pH measurements are made in water with 1,000 to 10,000 uS/cm conductivity. The conductivity conies from dissolved solids, typically, salts plus net acid or base which explains the exhibited pH. These dissolved substances are in the solution in ion form, which makes such solutions conducting. With 1,000 uS/cm conductivity of mobile ions pH electrodes have a good circuit and give fast, ...


    By IC Controls Ltd.

  • An Easy Guide to Understanding Surfactants

    What is a Surfactant? Surfactants are a primary component of cleaning detergents. The word surfactant means surface active agent. As the name implies, surfactants stir up activity on the surface you are cleaning to help trap dirt and remove it from the surface. Surfactants have a hydrophobic (water-hating) tail and a hydrophilic (water-loving) head. The hydrophobic tail of each ...

  • Low-Flow (Minimal Drawdown) Ground Water Sampling Procedures

    The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA’s Regional Superfund Offices, organized to exchange information related to ground-water remediation at Superfund sites. One of the major concerns of the Forum is the sampling of ground water to support site assessment and remedial performance monitoring objectives. This paper is intended to provide ...

  • On-site determination of the radon concentration in water: sampling & on-line methods

    Radon in the water dissolves and escapes into the air during household water use, especially when it is heated. An easy-to-handle experimental set up forthe on-site determination of the Radon concentration in water samples has been developed and tested. In contrast to laboratory techniques for Radon-in-water determination such as liquid scintillation counting orgamma-ray spectroscopy, the ...


    By Bertin Instruments

  • Ground water sampling bias observed in shallow conventional wells

    EPA’s Hutchins and Acree present the results of their field research showing the misleading data that are often generated using samples collected from conventional monitoring wells. They conclude that “These data provide an additional example where cluster well points or other methods of obtaining depth-discrete samples would be required to provide an accurate assessment of either the extent of ...


    By Solinst Canada Ltd.

  • New technique for direct fluoroimmunomagnetic detection of rotavirus in water samples

    A new rapid, sensitive and selective method for rotavirus detection in water samples is described in this paper. Amino pink magnetic microparticles were functionalized with monoclonal antibodies and used to capture, concentrate, separate and detect infectious rotavirus particles in distilled and drinking water samples. The fluorescence of the microparticles was used to determine the ...


    By IWA Publishing

  • Detection of bisphenol A in water samples using ELISA determination method

    In order to study whether bisphenol A (BPA) can pass into drinking water from polycarbonate barrel and exist in the river and industrial effluent the indirect competitive enzyme-linked immunosorbent assay (ELISA) for the determination of BPA was established. The results presented an inhibition concentration at 50% absorbance (IC50) of 0.123 mg L−1, and the limit of detection (LOD) is 9.934 μg ...


    By IWA Publishing

  • Microbiological water quality and sampling policy of public swimming pools

    Water samples collected from 100 public swimming pools in the West Bank of the Palestine by health inspectors. The samples were tested for microbiological quality for the years 2003, 2004 and 2005. The overall of unaccepted tested swimming pool water samples were as follows: 35.8% for total Coliforms (TC), 24.4% for faecal Coliforms (FC), 36% for Heterotrophic Plate Count (HPC), 39.3% Enterococci ...


    By Inderscience Publishers

  • Sample System Best Practices for Water and Hydrocarbon DP Applications

    Abstract Sampling techniques for BTU and moisture measurements are well understood but applications beyond the routine requires additional attention to detail. Two such applications are the subject of this paper. The first is the measurement of low level moisture (1 – 1,000 ppbv) for cryogenic processes. Measuring moisture below 1 ppm is an entirely different world from the traditional ...

  • Laboratory Management - Integrated Sampling the Key to Safe Water Supply

    Leading water suppliers use Laboratory Information Management Systems (LIMS) to integrate the sample collection and analysis process, helping to maximize the efficiency of these programs. Drinking water suppliers around the world face unique challenges: They must deliver the most essential ingredient for life on a grand scale, while also navigating complex issues surrounding public safety, ...

  • Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures

    Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water ...


    By Solinst Canada Ltd.

  • Issues concerning spectral analysis of water samples for monitoring and treatment of public water resources

    Experimental measurements conducted in the laboratory, involving hyperspectral analysis of water samples taken from public water resources, have motivated a re-evaluation of issues concerning the potential application of this type of analysis for water monitoring, treatment and evaluation prior to filtration. One issue concerns hyperspectral monitoring of contaminants with respect to types and ...


    By IWA Publishing

  • Validation of Salt Water Disposal Well Treatment Plants with Handheld Oil in Water Sample Analyzer

    Salt Water Disposal (SWD) well operators often dispose a substantial volume of oil inadvertently when injecting salt water, thereby losing the opportunity to sell the oil on the market and potentially reducing the ability to inject water in the well. Injection facilities are typically operated with minimal instrumentation or system optimization, which means the operators don't know how much, or ...

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