Ambient Air Monitoring Articles

  • Particle Monitoring in Sterilizing Tunnels

    Portable aerosol particle counters are designed to sample ambient air at 1 cubic foot per minute (1 cfm) and no greater than 35 oC. There are however applications which are based on ambient temperatures much greater than this, such as pharmaceutical sterilizing tunnels. Sterilizing tunnels are used to ensure sterility off glassware (vials, syringes, bottles) prior to their entry onto an aseptic ...


    By Particle Measuring Systems

  • Improved Particle Counting Accuracy in Manifold Monitoring

    Abstract Many particle counter users are unaware that – during traditional manifold sampling – the monitor undercounts the ambient particle concentration. Because of the additional vacuum created by the manifold pump, the particle concentration is substantially lower in the air sampled than in the ambient cleanroom air. Unless the system adjusts appropriately, this ...


    By Particle Measuring Systems

  • Intraurban Variability of Ambient PM Arsenic and Other Air Toxics Metals in St. Louis

    The Missouri Department of Natural Resources (MoDNR) and Washington University participated in a project to collect and analyze air toxics metals data. It was funded through a Community Air Toxics Grant from the U.S. Environmental Protection Agency (USEPA). The study grew out of the southside St. Louis Community Air Project (CAP) which identified six hazardous air pollutants of concern including ...

  • Gas Chromatography: MCERTS Certification for Ambient Air Analysis on Benzene and VOCs

    Due to environmental issues, the world of gas analysis is evolving very rapidly.Governments set the rules to limit and control the environmental pollution through legislation.Volatile organic compounds (VOCs),often produced by human activities, are amongst the sources of pollution that need to be identified and quantified for safety reasons. Exposure to high concentrations of certain VOCs is ...


    By Chromatotec Group

  • Introducing ozone to water purification – Case Study

    Traditionally, chlorine has been used to disinfect water for drinking. Unfortunately, chlorine produces carcinogenic by-products called trihalomethanes (THM’s) when it reacts with organic substances in surface waters. The recent adoption of the Surface Treatment Rules by the U.S. E.P.A. places strict limits on chlorine. Because ozone produces fewer disinfecting by-products, the EPA, along ...


    By Sierra Instruments, Inc.

  • Reducing the threat of carbon soot – Case Study

    The U.S. government now recognizes that black carbon soot is the number two cause of climate change and the most important component of air pollution affecting our public health. This soot, caused mainly by the burning of fossil fuels and firewood, is often found in huge smog-like plumes known as "atmospheric brown clouds." According to a report commissioned by the U.N. Environment Program, this ...


    By Sierra Instruments, Inc.

  • Health Impacts of Transported Global Air Pollution and International Trade

    Globalization moves production and health problems to low cost countries such as China. Estimations show that 3.45 millions of deaths of people yearly are caused by PM2.5 particulate matter in the ambient air. 760.000 of these deaths are caused by production of goods in one continent for use in another continent. ...


    By Opsis AB

  • Dust monitoring with AirSafe - Case Study

    Application A producer of building materials manufactures adhesives for fl oor tiles. As a part of the production process powder is transported through pipes from one production site to another. The pipes lead through production facilities and rooms which are diffi cult to control because of their vast extent. In the past several leakages in the pipework caused the discharge ...


    By ENVEA

  • Dust monitoring with AirSafe - Case Study

    Application A waste incineration plant burns waste. A fi nal product of this incineration process is fi lter dust, which is stored in silos before being evacuated. For the ambient air monitoring of the silos, convey lines and connected rooms, the plant manager looked for a maintenance-free way to detect dust leaks and malfunctions. Optical techniques were not ...


    By ENVEA

  • Continuous dust monitoring with AirSafe - Case Study

    Application A producer of dry mortar needs dry sand and trass for the production process. Both materials are dried in a hot gas heater at a temperature of 500 °C before they are admixed. The hot gas heater uses brown coal dust as combustion material. The brown coal dust, which is stored in a silo, is transported via a rotary valve in free fall to a distribution plate. From there it ...


    By ENVEA

  • Fence-line Monitoring: Benzene and Beyond

    Measurements of ambient air quality close to industrial facilities are sometimes referred to as fence-line monitoring, in particular if the ambition is to evaluate the facilities’ contributions to the air pollution situation. ...


    By Opsis AB

  • Gas Concentration Monitoring in Sulfuric acid production

    Sulfuric acid (H2SO4) is a central substance in the chemical industry. Principal uses include mineral processing, fertilizer manufacturing, oil refining, wastewater ...


    By Opsis AB

  • Factors affecting the choice of VOC sensor

    VOCs (Volatile Organic Compounds) perform many vital roles as fuels, solvents, cleaners, feedstock, sterilants etc. However, they can be harmful to health and the environment, so it is often necessary to monitor their concentration. By definition, organic compounds contain the element carbon, and exhibit similar chemical properties, which is advantageous from a monitoring perspective. However, ...


    By Alphasense

  • Pollutant reduction control and Continuous Emissions Monitoring at Waste-to-Energy Plants

    Waste is generally undesired, and best not generated at all. The second best alternative to manage waste is to recycle it. However, there is also waste that for various reasons is not recycled. Landfills have then been the old-school solution, but it is for environmental reasons becoming a less viable option. What then remains is waste incineration, in most cases while recovering the energy ...


    By Opsis AB

  • AMC-Monitor T-1000: all-in-one analyzer for the semiconductor industry

    Real-time VOC monitoring in FOUP, fab and the clean-room environment Airborne Molecular Contamination (AMC) is more and more taking center stage in today’s semiconductor manufacturing processes. In the past the focus was on filtering particles from the ambient air in the ...


    By Ionicon Analytik Ges.m.b.H.

  • Real Driving Emissions: Meaning and Monitoring

    Road traffic is a key contributor to ambient air pollution in many parts of the world today. Throughout the years, different legislative efforts have been made to reduce pollutant emissions, both at national and international levels. One of the recent steps taken, is to introduce limits on ...


    By Opsis AB

  • Air Defender: Truck Vapor Recovery and Oxygen Removalmodel : AD1S2 - Case Study #170601

    Project Details Location: Marcellus Carbon Capacity: 3300 lbs Processing Rate: 2 trucks / day Electrical Class: C1D1 HP: (2) 2HP Vacuum Pumps Voltage: 480 VAC Year Installed: 2016 ...


    By AEREON

  • Development of on-line and field dual TD GC – MS for automatic VOC monitoring on petrochemical sites

    Ambient air is polluted by many semi-Volatile and Volatile Organic Compounds (SVOCs and VOCs) coming from anthropogenic and natural sources. VOCs from PAMS, TO14 and TO15 lists can be measured in many ranges of concentration, from pg/m3 up to mg/m3 depending on the location of the measurements. Due to the large number of molecules, the complete separation of all compounds is difficult to perform ...


    By Chromatotec Group

  • Why use purge air? And what practicalities to consider.

    Many AMETEK Land instruments use purge air, in the post I am going to explain the purpose and some of the practicalities surrounding this technology. In general, purge air is used on optical instruments such as emissions monitors and ...


    By AMETEK Land

  • Why Use Purge Air? And What Practicalities to Consider.

    Many AMETEK Land instruments use purge air, in the post I am going to explain the purpose and some of the practicalities surrounding this technology. In general, purge air is used on optical instruments such as emissions monitors and ...


    By AMETEK Land

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