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Air Analyses Applications

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    Formaldehyde and Acetaldehyde Determination in Air Using Fully Automated On-Line Desorption and Analysis of DNPH Cartridges

    Airborne aldehydes and ketones are collected by passing air through a cartridge containing 2,4-dinitrophenylhydrazine (DNPH). Carbonyl compounds react with the DNPH to form hydrazones, which are immobilized on the cartridge. These compounds can be easily eluted from the cartridge with acetonitrile and analyzed by HPLC with UV detection. Traditionally, this analysis including the workup contains a series of manual steps, which can become time-consuming and could incur experimental error. Automating the extraction of LpDNPH S10 cartridges and putting it in-line with the HPLC analysis will significantly reduce manual labor using this technique and this will improve reproducibility of the method by reducing potential experimental errors by the operator. The automation and unattended operation of the method leads to high throughput for determining airborne formaldehyde and acetaldehyde.

    By Merck KGaA, Darmstadt, Germany based in Darmstadt, GERMANY.

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    Analysis of Isocyanates Using the ASSET™ EZ4-NCO Dry Sampler

    Isocyanates are used as a raw material to produce a number of products . Personal exposure can occur while the products made with isocyanates are being applied, or when the materials are removed by grinding or thermal degradation. Workers who are exposed to these compounds are at risk for respiratory disorders and asthma. The highly reactive nature of the isocyanate compounds and the low occupational exposure limits put high demands on both sampling and analytical techniques for monitoring of isocyanates in air. We investigated the performance of the LC-MS and LC-MS-MS methods in the analysis of isocyanates using the new ASSET™ EZ4-NCO Dry Sampler. We found that the analytical method can successfully reach the quantitation limit for most isocyanates of 5 ng/mL in the final sample when LC-MS-MS analysis was used and the quantitation limit of 10 ng/mL when LC-MS analysis was used. All 11 compounds were well-resolved chromatographically using a 15 cm Ascentis Express C18 column.

    By Merck KGaA, Darmstadt, Germany based in Darmstadt, GERMANY.

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    Monitoring of mercury in ambient air

    Mercury, being widespread in environment, has toxic effect on a human organism even at a low concentration. Therefore, quantitativ e determination of mercury in vari ous environments is one of the most important environmental monitoring problems. The use of a mercury analyzer RA-915M/RA-915+/RA- 915Light with Zeeman background correction provides di rect real-time continuous determination of mercury in air from 0.5 ng/m 3 within the overall possible range of me rcury concentration in ambient air.

    By Lumex Instruments Group based in Mission, BRITISH COLUMBIA (CANADA).

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    Baseline® 9100 Residual Solvent Analysis — Ethanol, Isopropanol, and Acetone

    MOCON’s Baseline® Series 9100 Gas Chromatograph equipped with a photoionization detector (PID) provides a quick, cost effective quantitative analysis of IPA and acetone in air at levels in the ppb and sub-ppb range with no preconcentration necessary. Isopropanol and acetone are detected and accurately quantified to sub-ppb levels in under 3 minutes with ethanol producing no interference. The instrument is sensitive to below 5 ppb for both IPA and acetone employing the MOCON Baseline® standard PID or 0.1 ppb using the MOCON Baseline® high sensitivity PID.

    By AMETEK MOCON - Baseline based in Lyons, COLORADO (USA).

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    Direct determination of mercury content in ambient air

    Introduction

    Mercury, being widespread in environment, has toxic effect on a human organism even at a low concentration. Therefore, quantitativ e determination of mercury in vari ous environments is one of the most important environmental monitoring problems.

    By Lumex Instruments Group based in Mission, BRITISH COLUMBIA (CANADA).

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    Gas analysis for the indoor air industry

    By Teledyne API based in San Diego, CALIFORNIA (USA).

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    Ambient air monitoring by FID detection – airmoVOC BTEX

    Urban pollution is a problem that concerns more and more people in charge of public health. In large cities, car emissions are an important source of atmospheric pollution. This problem is growing as the traffic keeps on increasing. BTEX compounds are present in car emissions. It is therefore important to be able to analyze them with short analysis cycle duration and on a continuous and automatic way.

    By Chromatotec Group based in Val de Virvée, FRANCE.

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    Direct AA Mercury determination in cosmetics

    INTRODUCTION

    High mercury concentration can be found in such cosmetic products as skin lightening soaps and creams, makeup cleansing products, and mascara.

    Mercury in cosmetics exists as inorganic and organic compounds. Inorganic mercury (e.g. ammoniated mercury) is used in skin lightening soaps and creams. Organic mercury compounds, such as thiomersal, are used as cosmetic preservatives in makeup cleansing products and mascara.

    By Lumex Instruments Group based in Mission, BRITISH COLUMBIA (CANADA).

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    Measurement of diacetyl in ambient air to monitor workplace exposure limits.

    The Series 8900 Diacetyl Analyzer provides direct measurement of Diacetyl in ambient air. This instrument is utilized for environmental monitoring and to monitor workplace exposure limits. The Series 8900 Analyzer for Diacetyl employs a photoionization detector (PID) as the sensing element. A dual column configuration with timed backflush to vent is used to strip off moisture and heavier hydrocarbons. A pre-cut column is used in series with the analytical column. At sample injection a fixed volume of sample is carried to the pre-cut column. Backflush is timed so that only the Diacetyl and other similar components are eluted to the analytical column. Contaminants on the pre-cut column are backflushed to vent. The Diacetyl is separated from potentially interfering components on the analytical column and elute to the detector for analysis.

    By AMETEK MOCON - Baseline based in Lyons, COLORADO (USA).

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    Open path ambient air quality monitoring

    Cerex Multi-Gas Open Path Analyzers are available in both FTIR and UVDOAS technologies to meet specific requirements for perimeter ambient air quality monitoring, leak detection, fugitive emissions monitoring and ambient air quality monitoring.

    By Cerex Monitoring Solutions, LLC. based in Atlanta, GEORGIA (US) (USA).

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    Analytical instruments for elemental analysis

    Elemental analysis is a generic term for a group of applications which deal with the analysis of a variety of materials (chemicals, liquids, polymers, waste material, etc.) for their elemental or isotopic properties. Typical examples of elemental analysis techniques where mass flow control plays a key role are Total Organic Carbon (TOC) or Total Organic Halides (TOX).

    By Axetris Ag based in Kaegiswil, SWITZERLAND.

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    Process instrumentation and analytics solutions for HVAC-R industry

    Siemens is a trusted partner for single-source solutions that bring your Heating, Ventilation, air conditioning and refrigeration systems (HVAC/R) installations to a whole new level of energy efficiency. From cogeneration energy production, district heating and cooling systems to compressed air and steam applications, we maximize your energy conservation and optimize the cost effectiveness of every process.

    By Siemens Industry, Inc. - Process Analytics based in Houston, TEXAS (USA).

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    Ambient Stations for Ambient Air Quality Monitoring

    Ambient air monitoring involves the measurement of `representative` air in urban, industrial and rural areas. These measurements are used to determine the human exposure to pollutants and can be combined with trace/background monitoring.

    By Opsis AB based in Furulund, SWEDEN.

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    Perimeter Ambient Air Monitoring

    Cerex Multi-Gas Open Path Analyzers are available in both FTIR and UVDOAS technologies to meet specific requirements for perimeter ambient air quality monitoring, leak detection, fugitive emissions monitoring and ambient air quality monitoring. Cerex multi-gas analyzers offer significant advantages over single gas analyzer arrays, electro-chemical sensor arrays and time integrated air sampling hardware

    By Cerex Monitoring Solutions, LLC. based in Atlanta, GEORGIA (US) (USA).

  • Ambient Air Passive Sampling

    By Ogawa & Company, USA, Inc. based in Pompano Beach, FLORIDA (USA).

  • Data Acquisition and Control

    Many companies worry over the quality of emissions data reported to the EPA. CEMS Experts is a skilled and experienced company with over 20 years of proven and dependable service to provide you with a reliable solution to your Analyzer Management and Data Acquisition Software needs. We supply customized DAS solutions for all federal (EPA), state and local CEMS regulations, plus off-the-shelf products for process monitoring, ambient air testing, or any other application requiring fast, reliable data capture and reporting.

    By CEMS Experts - a division of GK Associates, Inc. based in Simi Valley, CALIFORNIA (USA).

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