6 Air Monitoring Compact Air Quality Monitoring System


The airpointer from Recordum (Austria) is a compact multi gas air quality monitoring system available in three sizes (2D, 4D, +PM). As result to its compact dimensions you can measure anywhere you want or have to and move quickly if needed. Because of a highly optimised energy management system and low maintenance needs the airpointer provides the lowest operating cost in the industry. The airpointer requires only 10% of the space of a traditional monitoring station, has only 10% weight, consumes less than 10% electricity and reduces the need of on-site service through the remote service feature.


With the modular configuration the airpointer provides solutions for a wide variety of pollutants: CO, NO/NO2/NOX/NH3, O3, SO2/H2S, PM10/PM2.5 which can be supplemented by a lot of additional sensors like meteorological parameters, traffic data sensors or a photo ionization detector for VOC.


For professional analysis the visualised measured data can be easily accessed via web browser. The airpointer is continuously live on air - a web server enables registered persons to read and analyse data, look at the maintenance and calibration logs or even update the system conveniently from anywhere in the world via an internet connection and a web browser.


The highest priority of the company recordum, is the reliable compliance of current legal requirements and norms and the continuous improvement of services. Therefore the measuring principles comply with the requirements of EU and USEPA.


Reader Reply Card No. Monitoring Impurities in Carbon Dioxide


Baseline-MOCON (USA), a subsidiary of MOCON releases the BevAlert Analytical System for carbonated beverage bottlers, modified atmosphere packagers, specialty gas manufacturers, and other industries that use carbon dioxide in their processes.


The BevAlert Analytical System is designed to exceed the analytical requirements of the International Society of Beverage Technologists’ (ISBT) guidelines for the detection of impurities in beverage grade carbon dioxide such as acetaldehyde, methanol, benzene, total sulphur, total hydrocarbons, and other impurities as requested.


Total hydrocarbons are measured with a Flame Ionisation Detector (FID), an industry standard. A Photoionisation Detector (PID) is used for acetaldehyde and benzene instead of an FID because of its lower detection limits for these chemicals. Additionally, the PID offers low noise, an easily accessible detector lamp, and reduced maintenance from using fewer support gases. Reducing sulphur compounds to hydrogen sulphide also allows a PID to be used for a Total Sulphur analysis for similar reasons. This leads to interchangeability of parts and operating knowledge of instrumentation.


The fully automated computer controlled system includes an intuitive touchscreen for set-up, control, and data display. Real-time, historical, and diagnostic data are all viewable and can be connected to built-in audible and visual alarms or tied to a plant’s programmable logic controller (PLC). Remote access via an Ethernet connection allows the user the ability to monitor the systems’ concentration data, as well as control diagnostics and analytical parameters, from a remote location. Multipoint sampling and trailer sample panels are also available.


Reader Reply Card No. Dry Sampler Makes Easy Work of Accurate Isocyanate Measurement in Air


Sigma-Aldrich/Supelco (USA) recently launched the new ASSET EZ4-NCO Dry Sampler for reliable isocyanate measurements in air. The easy-to- use sampler was developed by the Institutet För Kemisk Analys Norden AB (IFKAN) in Hasselholm, Sweden and complies with ISO 17734-1 Determination of organonitrogen compounds in air using LC-MS Part 1: Isocyanates using dibutylamine derivatives.


The patented design of the cartridge and the use of dibutylamine as a derivatising reagent provide the highest sensitivity and stability of the derivatives. Unlike common isocyanate sampling devices, ASSET EZ4’s capacity allows for work place measurements from 5 minutes to 8 hours for true time-weighted average (TWA). Additionally, the design ensures particulates are completely derivatised, preventing underestimation of exposure.


It does not require field desorption or any special storage conditions before or after sampling; has a two-year shelf life; and it is recommended to be analysed by LC-MS/MS within four weeks after sampling. It is supported by a set of calibration standards, including a deuterated internal standard.


Reader Reply Card No.


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Meteorological Instruments


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Reader Reply Card No. 21 IET November / December 2012 www.envirotech-online.com


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Hum Measure Air Quality Onboard Airbus Aircraft


On an aircraft, cabin air quality contributes significantly to the comfort and well being of passengers and crews alike. Commercial aircraft operate primarily in the troposphere and lower stratosphere, which is an environment hostile to life. A sophisticated aircraft environmental control system ensures that our journey onboard aircraft usually is a comfortable experience despite outside conditions of -50°C, high ozone concentrations and only 1/5th of the ambient pressure on the earth's surface. Outside air which is usually very clean, particularly during flight, is conveyed into the pressurised fuselage and approximately the same amount is discarded overboard by the environmental control system. The entire cabin air is exchanged with outside air every three minutes.


In an article in the Airbus / FAST magazine #50 (August 2012) Dr. Andreas Bezold explains details of cabin air quality, the aircraft environmental control system and measurement campaigns involving an IONICON (Austria) PTR-TOF 8000 instrument providing further insights:


"...Airbus is promoting and supporting international research projects and working groups, to acquire independent external expertise and scientific knowledge by promoting best standards for an ideal cabin environment and its verification. [...] Currently, a number of air quality measurements are conducted on the A380 flying test bed for the new A350XWB (Extra Wide Body)


Trent engine. These analytical capabilities were also used to tackle problems that could occur during production flights, which are conducted for each aircraft prior to delivery by Airbus. Any contamination introduced during manufacturing will become apparent when the aircraft air supply system is operated as a whole, and some parts of the bleed air system are subjected to the highest operational temperatures for the first time.


Recently a sophisticated measurement system was planned and installed on several A330/A340 Family aircraft, consisting of a unique online mass spectrometer (Ionicon PTR TOF 8000) and a multifunctional sampling system (Fraunhofer IBP) to elucidate the origin of a particular smell that occurred during production flights only.


With this analytical system, a marker substance and finally the root cause for the smell could be identified unambiguously, based on the results of air quality measurements on the aircraft during flight. Knowing the precise root cause and having clear evidence at hand, corrective actions could be implemented at the supplier which is manufacturing the component responsible for the smell, and will be further followed up."


Reader Reply Card No. 20 19 18 17


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