air analysis Articles

  • Indoor Air Analysis - Zigbee

    PPM Technolgy"s new IAQ profile monitor featured as part of the Telegesis ZigBee case ...


    By PPM Technology

  • Exergy analysis of an air solar heater

    This paper presents an exergetic analysis of a downward flat plate collector, an unglazed selective absorber collector and an artificial rough surface collector. The analysis is based on mass, energy and exergy balance equations. The results show that for the Reynolds number of Re = 4000, the daily exergy output rate varies inversely with the mass flow rate per unit area, while the exergy ...


    By Inderscience Publishers

  • Implementing QALYs in the Analysis of Air Pollution Regulations

    In recent years, there has been growing interest in cost-effectiveness analysis for environmental regulations using quality-adjusted life years as the measure of effectiveness. This paper explores the implications of the QALY approach for measuring the impacts of air pollution regulations, with an example using the U.S. Environmental Protection Agency’s Heavy Duty Engine/Diesel Fuel regulations. ...


    By Springer

  • 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

  • Industrial applications – Air analysis in clean air room - Case study

    Context & Challenges To ensure people’s safety and a good repeatability of industrial process, the analysis of ambient air is crucial. Especially, electronic boards are produced in clean air room by complex lithographic process using very reactive chemicals. The nature and concentration of volatile compounds can be different depending on the chemical process and can also vary ...


    By Chromatotec Group

  • Mercury Analysis

    Characteristics of Mercury What is Mercury? Mercury is a naturally occurring silver-colored metallic element noted for its occurrence as a liquid at room temperature and toxic to living organisms. This silvery, opaque liquid metal is very dense, yet has a high surface tension that causes it to form tiny perfect spheres in the pores of the rocks it is found in. It is ...


    By HORIBA Europe GmbH

  • Ambient Air Quality Analysis of Toxic Gases and Priority

    The EPA regional offices who continuously monitor ambient air quality have determined that combustion by-products and automobile exhaust make up the largest source of air pollution throughout the U.S., with more severe conditions existing overseas. Despite concerns about the conditions outdoors, air quality in the workplace and home environment receive even more attention. The EPA’s list of ...


    By Buck Scientific Inc

  • Air pollution modelling, sensitivity analysis and parallel implementation

    A new approach for Sensitivity Analysis (SA) in the field of air pollution modelling is proposed and applied to the Unified Danish Eulerian Model (UNI-DEM), a large-scale air pollution model. The SA requires numerous model experiments with different values of the studied parameters. By simultaneous variation of these parameters we produce a set of multidimensional discrete functions. These huge ...


    By Inderscience Publishers

  • Evaluating Guidelines for Air Sampling Methods Utilizing Chromatographic Analysis

    The following evaluation guidelines were developed to provide chemists of the Methods Development Team with a uniform and practical means for evaluating sampling and analytical methods that utilize chromatographic techniques. The guidelines define sampling and analytical parameters, specify required laboratory tests, statistical calculations, and criteria for acceptance, and provide a detailed ...

  • Polyurethane Foam as an Effective Adsorbent for Pesticides in Air (GC Analysis)

    Polyurethane foam (PUF) is a lightweight, easy-to-use material for sampling pesticides in air. Low back pressure allows sampling times and representative samples. A PUF filter cartridge designed to attach to the front of an ORBO-1000 PUF sampling cartridge traps aerosols and particulate matter, is easily and conveniently assembled, and can be removed from the ORBO-1000 cartridge and capped ...


    By MilliporeSigma

  • Uncertainty analysis of modelling studies included in air quality assessments

    This paper deals with the development of a quality analysis/quality control (QA/QC) methodology for modelling studies associated with air quality assessments. Among other benefits, this will allow data quality objectives for model input data to be derived and the importance of policy oriented model applications to be assessed. The procedure for evaluating model uncertainty has profited from a ...


    By Inderscience Publishers

  • Air pollution control using laser analysis – Case Study

    An LDS 6 analyzer monitors HF emissions during the production of hydrofluoric acid in accordance with the German Technical Instructions on Air Quality Control (TA Luft) The customer Fine chemicals and inorganic basic chemicals have been developed and produced at the Seelze chemical site in northern Germany for more than 100 years. Such a basic chemical is ...

  • Daily air pollution time series analysis of Isfahan City

    Different time series analysis of daily air pollution of Isfahan city were performed in this study. Descriptive analysis showed different long-term variation of daily air pollution. High persistence in daily air pollution time series were identified using autocorrelation function except for SO2 which seemed to be short memory. Standardized air pollution index (SAPI) time series were also ...

  • News on Air 2013, Volume 3: Products for Analysis and Quantification

    Welcome to the third volume of our News On Air bulletin. This edition focuses on the often overlooked and neglected, but one of the most crucial steps in the analytical workflow: selecting the correct reagents and analytical reference materials for your application. In this edition, you can get tools to help you select applications for air sampling; find air and emmissions proficiency testing ...


    By MilliporeSigma

  • Technical and economic analysis of a solar–assisted air–conditioning system

    This paper presents analysis aiming at assessing the feasibility and economic performance of a solar–assisted air–conditioning system for a middle class house under the climatic conditions of Tunis City. Two alternative cooling modes for the single effect water–lithium bromide absorption machine are considered, a water–cooling in association with a cooling tower and ...


    By Inderscience Publishers

  • Exergy analysis of advanced transcritical CO2 air conditioning cycles

    The energy and exergy balance methods were performed on two advanced transcritical CO2 air conditioning cycles presented in the literature. In addition to the basic transcritical CO2 air conditioning cycle which has five main components, compressor, gas cooler, evaporator, expansion valve and internal heat exchanger, two advanced cycles are investigated; both have two-stage compressor (low stage ...


    By Inderscience Publishers

  • Power estimation for air cooling and dehumidification using exergy analysis

    This paper presents a theoretical analysis based on the second law of thermodynamics to estimate the minimum work required for air cooling and dehumidification. Isothermal dehumidification and sensible cooling processes can be combined to give an equivalent path capable of representing the conventional air conditioning process in hot and humid climates. Dehumidification is analysed as a ...


    By Inderscience Publishers

  • Analysis of the impact of the new Athens airport on urban air quality with contemporary air pollution models

    The new airport of Athens will be constructed in the Spata area to the east of the Athens basin. In an attempt to reveal how the airport operation will influence air quality in Athens, the transport of air pollutants in the Athens basin and the Spata area is studied by applying a set of contemporary models, all constituents of the European Zooming Model (EZM). Simulations were performed for ...


    By Inderscience Publishers

  • Sensitivity analysis of indoor air exergy with environment reference state in China

    This paper analyses the exergy of air in the building affected by the reference state, considering parameters of temperature and humidity of air. Taking TMY data of 25 typical cities in different building thermal climate zones of China and considering the chemical and physical exergy of air, the exergy of air in the building influenced by the dynamic and static reference state is comparatively ...


    By Inderscience Publishers

  • 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

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