sequential air sampling Articles

  • Measurement of Toxic and Related Air Pollutants - Field-Emplaceable Air Samplers for Automated Ambient, Site, and IAQ Use (Including TO-17 Applications)

    Abstract Air samples taken on collection media for laboratory analysis remain a highly sensitive and cost-effective means of assessment. However, collection of samples can be difficult using nonautomated samplers, particularly over long terms or at remote locations. This paper describes a number of automated air samplers for sorbent-tube and filter use. The samplers are batterypowered, portable ...


  • Data assimilation within the Air4EU project: the Athens case

    The current study aims to investigate the application of the Data Assimilation (DA) in the greater Athens basin, according to the methodology developed within the framework of the Air4EU project. The advanced Sequential Importance Re-sampling (SIR) method was applied in an effort to improve the performance of the regional scale model OFIS. The current study was focused on the concentration levels ...


    By Inderscience Publishers

  • System Description for Monitoring Volatile Hydrocarbons

    To help build a comprehensive Industrial Hygiene program, Buck Scientific introduces the IH910 vapor monitoring system utilizing our model 910 gas chromatograph and IH300 air sampling train. Designed to analyze hydrocarbons in air, such as degreasing solvents and paint vapors emitted during plant operations, the IH910 penetrates the 1mg/m3 detection barrier erected by other field portable gas ...


    By Buck Scientific Inc

  • Detection of pentachlorophenol in soil

    MATRIX: Soil ANALYTES: Pentachlorophenol (PCP) RANGE OF DETECTION: 100 ppb to 10 ppm MATERIALS: Pentachlorophenol RaPID AssayÒ kit and Sample Diluent Reagents: methanol (reagent grade), sodium hydroxide (ACS grade), distilled or deionized water. Equipment: reciprocating shaker, plastic bottles (polypropylene or ...


  • Ultra-trace arsenic speciation at Columbia Analytical

    Ultra-trace speciation of arsenic and other metals is performed using a variety of techniques tailored to the specific combination of species, matrix, and detection limits required. Currently, two analytical systems are applied: Ion Chromatography-Inductively Coupled Mass Spectrometry (IC-ICP-MS) and Hydride Generation-Cryogenic Gas Chromatography-Flame Atomic Absorption Spectrometry ...


  • Time is of the essence in plastics

    Introduction Determining the moisture content in plastics is an important step in the extrusion and molding process of many industrial resins.  Excessive moisture content can lead to microscopic steam pockets that can blister or weaken the integrity of the molded product.  Plastic pellets in a saturated or ‘wet’ state can also mislead buyers of bulk plastic since ...


    By Arizona Instrument LLC

  • ORP and pH Based Control of SBR Cycles for Nutrient Removal from Wastewater

    ABSTRACTContinuous monitoring of multiple process functions were conducted involving removals of BOD, TSS and nutrients, in each cycle of the SBR reactor at the wastewater treatment plant of the City of Carrabelle, FL. On line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent ...

  • Pilot-Scale Biofilter Test for Treating Zimpro Odors

    The thermal sludge conditioning process of U.S. Filter/Zimpro Corporation, Rothschild, Wisconsin (Zimpro process) is primarily used to improve dewatering characteristics of the waste sludge. The process entails a partial breakdown through oxidation and hydrolysis of complex, high molecular weight organic compounds, such as, proteins, fibers, carbohydrates, and fats. The partial breakdown of ...


    By PRD Tech, Inc.

  • Gas detector communication technology for offshore oil and gas platforms

    In few applications is safety as important as on offshore oil and gas platforms. Explosive hazards from hydrocarbon gases and vapours are an ever-present risk, whilst toxic hydrogen sulphide gas and depleted oxygen environments can pose significant risks to personnel. Gas detectors are therefore essential to provide dependable early warning of gas hazards. Gas detectors are permanently installed ...

  • Fitting Into the Neighborhood: Operating by Progressive Odor Management Plan

     Operating by Progressive Odor Management Plan Why would anyone build an $11 million composting facility designed to process an average of 130 tons/day of feedstocks less than one mile from luxury homes, a new high school, a golf course, fast food restaurants, a grocery store, and in an area with a vivid memory of a compost site that impacted the neighborhood and shut down due to odor ...


    By BioCycle Magazine

  • Flying High

    Operating a biogas plant without gas quality and flow instrumentation is like trying to fly a ...


    By Gas Data Ltd

  • Beliefs, Politics, and Environmental Policy

    Introduction Many of us who work on environmental issues have faced the challenge of conveying their importance to nonspecialists. Perhaps we have found ourselves defending the robustness of climate science to a contrarian uncle, or extolling the importance of biodiversity to a dubious aunt. Our relations and friends are often educated people, skilled in their own professions, who have ...


    By Oxford Journals

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