VOC Monitoring Articles

  • Leaf level emissions of volatile organic compounds (VOC) from some Amazonian and Mediterranean plants

    Emission inventories defining regional and global biogenic volatile organic compounds (VOC) emission strengths are needed to determine the impact of VOC on atmospheric chemistry (oxidative capacity) and physics (secondary organic aerosol formation and effects). The aim of this work was to contribute with measurements of tree species from the poorly described tropical vegetation in direct ...


    By Chromatotec Group

  • Dirty Work Made Clean: Volatile Organic Compound Recordkeeping

    Picture this scenario: three facilities - two operating under Title V that are major sources of NOx emissions; situated in the second most populated urban area in the United States and one of the smoggiest; heavily regulated by state air quality control agencies; having to comply with stringent monitoring of gases and chemicals on a daily basis; tracking all environmental data in a dated and ...


    By Enviance, Inc.

  • EPA - China case study

    The first online air quality monitoring network for a 27 km2 industrial area The monitored area Situated south of Shanghai, in Zhejiang province Heavily industrialized area Main activity: fine chemicals 10 plants under surveillance, under the authority of the Chinese governmental agency for environmental protection (EPA) ...


    By Alpha MOS Environment

  • VOC control efficiency compliance test case study

    Skyworks Solutions, Inc. (Skyworks) selected CK to perform a compliance emissions testing program to determine the control efficiency of a new Roto-Concentrator followed by a thermal oxidizer (RC/TOx) used to control volatile organic compounds/hazardous air pollutants (VOC/HAP) from multiple manufacturing processes. A facility air permit condition required compliance testing of the subject RC/TOx ...


    By CK Environmental, Inc.

  • NEC Directive status report 2012

    This report describes the most recent emission inventory information provided by the Member States of the European Union at the end of 2012 under Directive 2001/81/EC, the National Emission Ceilings Directive (NECD) (EC, 2001). The NECD requires all 27 Member States to report information annually concerning emissions for four important air pollutants: nitrogen oxides (NOX), non-methane volatile ...

  • Superior voc protection for project situated on former railroad site case study

    Project: Smith Performing Arts Center Location: Las Vegas, NV Products: Liquid Boot Gas Vapor Mitigation System, GeoVent™ Gas Venting System, Ultraseal Waterproofing System Background: Vapor intrusion has become a significant environmental issue for regulators, industry leaders, and concerned residents nationwide. The ...


    By CETCO

  • CETCO vapor mitigation system chosen as voc protection barrier for school campus case study

    Project: Mott Haven School Location: Bronx, NY Products: Liquid Boot® Gas Vapor Mitigation System Background: The Mott Haven School Campus was to be built on a former manufacturing site with residual contaminants in the soil. Challenge: The site for the school development underwent a series of ...


    By CETCO

  • SO2 effect on secondary organic aerosol from a mixture of anthropogenic VOCs: experimental and modelled results

    The effect of SO2 in the photooxidation of a mixture of anthropogenic precursors is studied. Four experiments are carried out in the EUPHORE outdoor chamber, adding different initial SO2 concentrations in each experiment. The experimental secondary organic aerosol (SOA) obtained in the experiments is compared with the aerosol simulated ...


    By Inderscience Publishers

  • Atmospheric transport model applied to understand the effect of biogenic emissions to secondary atmospheric aerosol in hemiboreal zone

    The SILAM model with built–in isoprene and monoterpene emission module from natural sources was run for May to August 2006 in Baltic Sea region. In this study VOCs were advected as passive tracers. Modelled hourly VOC–tracer concentrations were compared with sub–half–micrometre aerosol concentrations, simultaneously measured in Preila (Lithuania), Tahkuse (Estonia), Hyytiälä (southern Finland) ...


    By Inderscience Publishers

  • End-user GHG emissions from energy: Reallocation of emissions from energy industries to end users 2005…-2010

    The objective of this report (1) is to help improve the understanding of past greenhouse gas (GHG) emission trends in the energy sector from the demand or end.user side. To do this, the report develops a methodology to redistribute emissions from energy industries to the final users (by sector) of that energy. This reallocation is done on the basis of Eurostat's energy balances and GHG ...

  • Evaluation of progress under the EU National Emission Ceilings Directive

    In 2001, the European Community adopted the National Emission Ceilings Directive (NEC Directive). Its objective is to limit the emissions of four important air pollutants in order to achieve the directive's interim environmental objectives concerning acidification and eutrophication in sensitive ecosystems, and health- and vegetation.related exposure to ground-level ozone. Over the past decade, ...

  • Field Detection of Chlorinated Alkenes in Well Water using the FROG-4000 Portable GC - Case Study

    Introduction Defiant’s FROG 4000, a portable GCPID system, was used to identify and determine the concentration of chlorinated alkenes in several extraction wells located in Tacoma Washington. Split samples were taken at each well and sent to an offsite lab for analysis. This case study examines the field exercise and highlights the high degree of agreement between the offsite lab and ...


    By Northern ANI Solutions Ltd.

  • NEC Directive status report 2011

    'The aim [of the National Emission Ceilings Directive] is to limit emissions of acidifying and eutrophying pollutants and ozone precursors in order to improve the protection in the Community of the environment and human health... by establishing national emission ceilings…' Directive 2001/81/EC, the National Emission Ceilings Directive (NECD) (EC, 2001) highlights the importance of ...

  • Sampling VOCs with Supel™-Inert Film Gas Sampling Bags

    Sampling VOCs with Supel™-Inert Film Gas Sampling Bags with Thermogreen™ LB-2 Septa as an Alternative to Tedlar® For 10 years, Supelco has provided our customers with high quality Tedlar gas sampling bags. Recently, we expanded our gas sampling bag line to include an alternative to Tedlar for sampling VOCs that incorporates our low-bleed Thermogreen™ LB-2 ...


    By MilliporeSigma

  • Rxi-624Sil MS Exceptionally Inert, Low Bleed Columns for Volatiles Analysis

    - Optimized selectivity for volatiles and polar compounds ensures good separations. - Highly inert columns improve accuracy and allow lower detection limits, even for active compounds. - Most thermally stable 624 column available; low bleed, fully MS compatible. While mid polarity 624 columns are widely used for analyzing polar analytes and volatile organic compounds (VOCs), not all columns ...


    By Restek Corporation

  • Building on a legacy of PID development

    Summary From the 1970s to the present day, photo-ionisation detectors (PIDs) have been at the front line of efforts to detect volatile organic compounds. As industrial hygiene has become ever more important and exposure limits for VOCs have reduced, PID technology has continued to develop, providing reliable detection under challenging environmental conditions at concentrations right down to ...


    By Ion Science Ltd.

  • Canarina DISPER software · air dispersion · volatile organic compounds · algorithms 18

    10. References   Bowers, J.F., J.R. Bjorklund and C.S. Cheney, 1979:  Industrial Source Complex (ISC) Modelo de dispersión User's Guide. Volume I, EPA-450/4-79-030, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711.   Bowers, J.R., J.R. Bjorklund and ...

  • Setting the standards for headspace sampling by PID

    The responsiveness of PIDs to virtually all VOCs has seen them become the accepted tool for initial site entry assessment, ensuring optimal detection of unknown and often toxic or hazardous chemicals found at hazardous waste sites and chemical emergencies. The speed and accuracy of modern PID equipment means that many worker and community safety concerns during initial and ongoing operations can ...


    By Ion Science Ltd.

  • Determination of VOCs in water using static headspace GC/MS with simultaneous full scan and selective ion recording

    The combination of static headspace sample introduction and gas chromatography/mass spectrometry (HS/GC/MS) provides the analyst with a powerful, fully automated technique for the determination of trace volatile organic compounds (VOCs) in water. Samples may be hermetically sealed in the headspace vial at the point of sampling. This approach avoids errors due to glassware cross-contamination and ...


    By PerkinElmer, Inc.

  • U.S. EPA volatile organics method 524.2 using PURGE and TRAP GC/MS

    Clean drinking water is of worldwide interest. Contaminants can compromise the quality of a water supply and cause short- and long-term health effects. Stringent water quality criteria help to ensure safe drinking water by requiring the detection and quantification of a wide variety of contaminants at extremely low levels. U.S. EPA Method 524.2 (1) provides the guidance necessary for identifying ...


    By PerkinElmer, Inc.

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