Liquid Monitoring Articles

  • Reducing Costs of Steam Flow Measurement

    Traditionally, steam flow has been measured with a differential pressure device. This is typically an orifice plate. However, such devices are inherently volumetric flow measurements. As we have discussed in previous blog posts, changes in pressure and temperature ...


    By Sierra Instruments, Inc.

  • Changes to guidelines for oxygen monitoring in Italy

    New guidelines for the storage of nitrogen have been established in Italy which highlight changes to oxygen monitoring procedures. These guidelines are approved by the Italian National Transplant Centre, which is a technical ...


    By Analox Sensor Technology

  • Case study - Customers recommend leachate pumps from Geotech

    Application Leachate recirculation and condensate removal from gas lines Equipment The AP AutoPump range Location Sites across the UK Customer H&J Pipe ...


    By Geotech

  • GA3000 monitors graves in Korea case study

    Application Research into gases produced by animal carcasses Equipment GA3000 Location Korea Customer A Korean government research facility supplied and supported by ENInstrument. ...


    By Geotech

  • Better tools for fast and convenient Patulin analysis

    Analytical Standards and New SupelMIP SPE Cartridges The mycotoxin patulin is often found in rotten apples. It is mostly produced by Aspergillus, Penicillium and Byssochlamys and shows a variety of short-term and long-term effects in animal studies, ranging from gastrointestinal problems and neurotoxicity to genotoxicity and teratogenicity. Therefore, many countries set limits for patulin ...


    By Sigma-Aldrich Co., LLC

  • Field application of a planted fixed bed reactor (PFR) for support media and rhizosphere investigation using undisturbed samples from full-scale constructed wetlands

    This study presents a novel method for investigations on undisturbed samples from full-scale horizontal subsurface-flow constructed wetlands (HSSFCW). The planted fixed bed reactor (PFR), developed at the Helmholtz Center for Environmental Research (UFZ), is a universal test unit for planted soil filters that reproduces the operational conditions of a constructed wetland (CW) system in ...


    By IWA Publishing

  • Analysis of DNAPL source depletion costs at 36 Field Sites

    Abstract A recent U.S. Environmental Protection Agency expert panel on dense non-aqueous phase liquid (DNAPL) remediation concluded that uncertainty in the costs and benefits of applying source depletion technologies (i.e., active remediation in source zones) is one key factor that discourages widespread use of these technologies at DNAPL sites (Kavanaugh et al., 2003). To reduce this ...


    By TRS Group, Inc.

  • The POROLUX “true” First Bubble Point detection mode application note

    The POROLUX 1000 is a research grade capillary flow porometer with very pressure and flow control and accuracy. In the POROLUX 1000 a porous sample is inserted, wetted with a so-called wetting liquid. The sample is usually a flat round disk, three different diameters are standard: 13, 25 and 47 mm. Custom made sample holders are optional. The wetting liquid is a liquid which fills up all pores of ...


  • Petrochemical Refinery invests in automated COD analysis system utilizing new PeCOD technology (case study)

    Background  A petrochemical refinery has 6 different wastewater sampling points for effective process control. When there is a problem in effluent COD, samples from all 6 points are needed to determine source of the contamination. Once the contamination source is determined, corrective actions are taken. Problem The current COD dichromate test ...


    By MANTECH INC.

  • Monitoring and Controlling Pretreated Liquid Waste

    Intelligent dataTaker System Handles All Data Collection CAS DataLoggers has just provided an intelligent data logger for a manufacturer facing stringent environmental regulations requiring them to continuously monitor and manage their effluent disposal. Before effluent is discharged from the facility, it had to be heavily ...


    By CAS DATALOGGERS

  • The effect of quench on Quantitating Alpha Radionuclides by Liquid Scintillation Counting

    Detecting and quantitating alpha emitting radionuclides are routine tasks in nuclear energy and environmental monitoring. For this purpose, liquid scintillation counting (LSC) is an excellent method because alphas are counted with nearly 100% counting efficiency with low backgrounds, even with severe quenching. Quenching agents such as inorganic acids, organic acids, and extractive scintillators ...


    By PerkinElmer, Inc.

  • Five Additional Technologies Evaluated After ERH Application at Camp Lejeune

    Groundwater at Site 89 of Marine Corps Base Camp Lejeune in North Carolina is contaminated with two dense non-aqueous phase liquid (DNAPL) plumes and a large dissolved plume. The Navy took a phased approach over the past six years to address each of these components. In 2003, electrical resistive heating (ERH) was evaluated in a pilot study to treat one DNAPL plume. In 2006, field-scale ...

  • Micro Flow Imaging Technology for Parenteral Applications

    MFI™ for Parenteral Drugs USP Chapter 788 (Particulate Matter in Injections) describes physical tests to be performed for the purpose of enumerating subvisible particles within specific size ranges. Recently the FDA has published a Stimuli Article (reference USPC 30 (6) Pages 2272-2280) demonstrating that advances in apparatus and quality control merit reducing the permissible particle counts ...


    By WIS Biomed

  • An overview of post-column derivatization methods from a pharmaceutical applications perspective

    High performance liquid chromatography (HPLC) is the technique of choice for separating analytes pursuant to their detection, identification, quantification and/or purification. Most organic substances, and certainly the majority of pharmaceuticals, are polar, nonvolatile or thermally labile molecules that are amenable to HPLC separation. Moreover, the availability of a large variety of LC column ...


    By Pickering Laboratories, Inc.

  • Analysis of DNAPL Source-Depletion Costs at 36 Field Sites

    A recent U.S. Environmental Protection Agency (US EPA) expert panel on dense nonaqueous phase liquid (DNAPL) remediation concluded that uncertainty in the costs and benefit of applying source-depletion technologies (i.e., active remediation in source zones) is one key factor that discourages widespread use of these technologies at DNAPL sites (Kavanaugh et al., 2003). To reduce this uncertainty, ...


  • Solid-phase extraction of room-temperature imidazolium ionic liquids

    Abstract Owing to their favorable properties, ionic liquids have recently gained recognition as possibly environmentally benign solvents. Now among the most promising industrial chemicals, they have already been labeled 'green' but this appellation seems due entirely to their very low vapor pressure. This growing interest in the various applications of ionic liquids will soon result in ...


    By Springer

  • A new monitoring method of CRVI in water using boron-doped diamond microelectrodes

    Boron doped diamond electrodes were used for the amperometric measurement of chromiumVI in water. A linear relationship of the current density as a function of the chromiumVI concentration was observed for concentrations comprised between 50 ppb and 4 ppm. Such results are particularly promising for the monitoring of chromiumVI in liquid effluents or process baths of several industries (stainless ...


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