surface sample Articles

  • Nitrate Analysis of Water Samples Using a Benchtop UV-Vis Spectrophotometer

    Nitrogen is naturally found in groundwater and surface water in the form of nitrate, nitrite, or ammonium. The EPA has established a maximum contaminant level of nitrate-nitrogen in potable water of 10ppm. This application presents results of UV-Vis analysis of nitrate concentrations in drinking water, ground water, and industrial wastewater, showing that the manual colorimetric method is ...

  • 4700 Sampler Industrial Park Wastewater Monitoring - InfraServ Knapsack, Germany - Case Study

    The Model 4700 Automatic Refrigerated Sampler from Teledyne Isco, Inc. is used for water quality monitoring at an industrial park operated by InfraServ Knapsack, Germany InfraServ Knapsack InfraServ GmbH & Co. Knapsack KG is the company that operates the Chemical Industrial Park Knapsack. The site is situated in Huerth, south of Cologne in Germany. The park is divided into ...


    By Teledyne Isco

  • Determination of uranium concentration in surface soil samples of Iran

    The use of uranium-tipped antitank shells during the Iraq war (2003) caused serious concerns in Iran and the international media over possible contamination of the Iranian environment and consequent long-term health effects. After a shell explosion, uranium is discharged by fire into the air in the form of oxidised particles, which can be dispersed over a radius of several kilometres. Gamma ray ...


    By Inderscience Publishers

  • TOC analyzer for airports

    During winter, de-icing processes at airports necessitate storm water and de-icing water management. Especially due to adhesive (sticky) substances, strongly fluctuating concentrations and a lot of chemicals, the monitoring systems itself must be tailor-made to fight this water analysis challenge. LAR 's ...


    By LAR Process Analysers AG

  • UV Light Treatment for HVAC Systems

    Ultraviolet (UV) light can be applied to support numerous applications in a broad range of industries. In commercial paint spray booths and label manufacturing plants, UV lamps are used to streamline paint jobs and the printing of logos. Outside of such practices, the light source may also be utilized to eradicate harmful, disease-causing bacteria. Systems that rely on the light’s ability ...


    By Larson Electronics LLC

  • A multi-method comparison of Atchafalaya basin surface water organic matter samples

    Received for publication January 29, 2008. Surface water organic matter (OM) was isolated from two distinct sites within the Atchafalaya Basin using a combination of XAD-8 and XAD-4 non-ionic macroporous resins and characterized by a suite of analytical methods, including elemental analysis, 13C cross polarization magic angle spinning nuclear magnetic resonance, attenuated total reflectance ...

  • Purpose of Air and Surface Mold Sampling or Testing during Assessment

    As part of determining whether an indoor environment is contaminated with excessive amounts of mold and requires remediation, Indoor Environmental Technologies (IET) routinely performs air and surface mold sampling or testing. While there are many types of sampling, IET uses two of them the most: Air sampling using a “spore trap” sampler. Considerable information ...

  • Surface Decontamination of Cyanide Compounds

    OBJECTIVE:  Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with potassium ferricyanide using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C (analysis). ...


    By KT Chemicals, Inc.

  • Specifics on Surface area

    Surface area is an important property of solids with many industrial applications. Particle size is less influential on surface area than particle shape, texture, and porosity. Surface area calculated from particle size data should never be used independently. Isotherms are developed for materials to determine their behavior during gas adsorption under very cold temperatures. Characteristic ...


    By Particle Technology Labs

  • Surface Decontamination of Selenium (Se) by DeconGel®

    OBJECTIVE:  Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with Selenium (Se) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C (analysis). ...


    By KT Chemicals, Inc.

  • Sensitive nanosilver-based spectrophotometric determination of Brilliant Blue FCF in surface water samples

    An accurate method was developed for the determination of Brilliant Blue FCF, a synthetic soluble colorant, in environmental samples. The method is based on the catalytic effect of silver nanoparticles (AgNPs) on the oxidation of Brilliant Blue FCF by hexacyanoferrate(III) in acetate–acetic acid medium at room temperature. Linearity of around four orders in the magnitude of concentration ...


    By IWA Publishing

  • Phosphorus control protects surface waters

    Phosphorus is the decisive factor for excessive algae and plant growth in water bodies, that’s why quality standards require reductions in the amount of phosphorus released from wastewater treatment plants into rivers and lakes. In recent years, the outlet limit values have not only been reduced on national levels. Depending on the vulnerability of ecosystems, especially low target values ...


    By Endress Hauser

  • InAs nanostructures on polar GaAs surfaces

    InAs nanostructures were grown by molecular beam epitaxy on GaAs (111)B and (211)B substrates at various growth temperatures between 450°C and 530°C. Their structural properties were studied by atomic force microscopy. For the (111)B grown nanostructures, the formation of self-aligned InAs quantum dashes was revealed, which in some cases took the form of nanowires. In the (211)B case, the shape ...


    By Inderscience Publishers

  • Surface Decontamination of Asbestos by DeconGel 1101

    Abstract Determine the surface decontamination efficacy of DeconGelTM 1101 on linoleum tile, painted drywall and concrete surfaces contaminated with Asbestos fibers (Chrysotile fibers) was performed with Transmission Electron Microscopy (TEM; ASTM Standard Test Method: D6480- 05) and Polarized Light Microscopy (PLM; EPA approved method for analysis of asbestos from bulk samples). ...


    By KT Chemicals, Inc.

  • Enteric viruses in surface water and sediment samples from the catchment area of Peri Lagoon, Santa Catarina State, Brazil

    This paper aims to quantify human adenovirus (HAdV), rotavirus species A (RVA), and hepatitis A virus (HAV) in surface water and sediments and to determine the viability of HAdV in these samples. Water and sediment samples were collected, and HAdV, RVA, and HAV were quantified by real-time polymerase chain reaction (PCR); HAdV was also evaluated for infectivity by a plaque assay (PA). For the ...


    By IWA Publishing

  • Ambient Air Sampling Methods

    Pollutants are nothing but any substance that may present in an atmosphere in such a concentration that it may harmful to surrounding, living organism or human being. Sampling and analysis of air pollutants is known as Air quality monitoring and it is major part of environmental monitoring. There are many advanced types of ambient air Sampling methods. we will learn here only which are most ...


    By Perfect Pollucon Services

  • Sampling moisture in the soil profile

    Patterns of water replenishment and use give rise to large spatial variations in soil moisture over the depth of the soil profile. Accurate measurements of profile water content are therefore the basis of any water budget study. When monitored accurately, profile measurements show the rates of water use, amounts of deep percolation, and amounts of water stored for plant use.Experimental ...


    By Decagon Devices, Inc.

  • A New Way to Locate Seeps Into Surface Waters

    How can we determine where groundwater is seeping into rivers and bays?  Knowing seep locations can help with selecting sampling locations, identifying contaminant sources, determining whether contamination is historic or on-going, and designing remediation.  Historically, methods for locating seeps have been limited.  Due to cost, sampling can only be done at a few ...


    By SelkerMetrics

  • Inter-laboratory validation of automated SPME-GC/MS for determination of pesticides in surface and ground water samples: sensitive and green alternative to liquid–liquid extraction

    An automated solid-phase microextraction gas chromatography/mass spectometry (SPME-GC/MS) method was developed for the determination of semi-volatile pesticides from several classes with a wide range of polarities in an environmental matrix, and validated according to the rigorous standards of a large commercial laboratory reporting data requiring regulatory acceptance with the purpose of ...


    By IWA Publishing

  • Surface Decontamination of Iodine (Potassium Iodide (KI)) by DeconGel®

    OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, floor tile, and concrete surfaces contaminated with potassium iodide (KI) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C ...


    By KT Chemicals, Inc.

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