Gas Sampling Articles

  • What is a Sanitary Sample Valve?

    As its name suggests, this type of valve is used in processing industries for sampling various products in different states of matter such as liquid and gas. The different types of fluids are examined using various techniques using sampling valves. Some of the main ...


    By Adamant Valves

  • Degassing a Liquid for Your Syringe Pump

    Four common methods for degassing samples Methods for Degassing Liquid All solutions equilibrated at room temperature and pressure will contain dissolved gases. Sample degassing is the process of removing these dissolved gases from solution. Removal of these gases may be necessary because the gases may escape from solution and form air bubbles in your syringe, ...


    By Chemyx Inc

  • Axetris achieves Silver Gas Award 2013

    Here the original text from G&I: „The Axetris AG LGD F200 self-contained laser gas detector module is designed for integration by original equipment manufacturers (OEMs) of selective catalytic reduction (SCR) systems and monitoring equipment and is based on proprietary technology- enhanced tuneable diode laser spectrometry. The OEM module can measure concentrations from well under ...


    By Axetris Ag

  • How Does a Gas Analyser Work?

    Whatever you want to detect, you need to identify a property of the object that is easy-enough to measure. When it comes to monitoring and analysis of gaseous species (atoms or more commonly molecules), it turns out that it often is possible to utilize the optical properties of the gas. You need a light source, a light detector, and a characteristic behaviour of the gaseous species in question ...


    By Opsis AB

  • Emission of hydrogen sulfide (H2S) at a waterfall in a sewer: study of main factors affecting H2S emission and modeling approaches

    Hydrogen sulfide (H2S) represents one of the main odorant gases emitted from sewer networks. A mathematical model can be a fast and low-cost tool for estimating its emission. This study investigates two approaches to modeling H2S gas transfer at a waterfall in a discharge manhole. The first approach is based on an adaptation of oxygen models for H2S emission at a waterfall and ...


    By IWA Publishing

  • Why You Should Consider a Sample Conditioning Unit for Taking Low NOx Measurements When Using a Portable Emissions Analyzer

    Using state-of-the-art technology, we here at E Instruments create high-quality portable industrial combustion gas and emissions analyzers that are capable of taking precise, low NOx measurements for both NO and NO2. In particular, we recommend our sample conditioning unit to those of you who need to take accurate, low NOx or SO2 ...

  • What is a Rotary Tube Furnace?

    By definition, a rotary tube furnace is a heat-treating circular furnace, which rotates during heat-treatment. Samples are transported through the furnace in a circular path as they are heated. Rotary tube furnaces generally burn pulverized, solid, gaseous or liquid fuel into its working section, and then the heating gases created flow towards the sample. These furnaces feature a metal drum lined ...


    By Thermcraft Inc

  • Influence of the Stirring Mechanism on the Precision of the Fusion for VITRIOX GAS and ELECTRIC

    Introduction Homogenization of the melt is an important aspect of sample preparation for X-ray fluorescence analysis using fusion. Whether the fused bead breaks or remains mechanically stable after cooling, depends largely on the homogenization. Once a stable fused bead has been obtained, it is only possible to judge if the sample is truly homogeneously dissolved in the flux by way of ...


    By Fluxana GmbH Co. KG

  • Troubleshooting injection volume variation in the Concurrent Solvent Recondensation – Large Volume Sample Injection Technique

    I’ve started receiving a number of questions about the large volume injection technique called Concurrent Solvent Recondensation – Large Volume Sample Injection. Most recently, a question came through the Tech Service group about injection volume variation. I had encountered a similar problem when working on the 50 µL injection for the combined 1,4-Dioxane and Nitrosamines ...


    By Restek Corporation

  • Overcoming Natural Gas Sampling Challenges in Oil & Gas Applications

    It is a fact that in order to comply with various government rules and regulations, oil and gas companies have to continually take natural gas samples to prove the gas composition and amount of gas flowing in their oil fields. The challenge comes in trying to actually take an adequate gas sample representative of the gas flow. First, engineers must carefully consider where the ...


    By Sierra Instruments, Inc.

  • Release of hydrogen sulfide in a sewer system under intermittent flow conditions: the Eiceira case study, in Portugal

    The presence and fate of hydrogen sulfide in wastewater systems were studied in two stretches of an intercepting sewer system located in a coastal village, in Portugal. A range of hydraulic parameters were obtained and liquid and gas phase measurements were carried out, both continuously and through intensive sampling campaigns. Upstream, where flow rates were relatively low, dissolved sulfide ...


    By IWA Publishing

  • Making a TO-15 Working Standard and the Super Standard Calculator – V2.01

    We already learned how to calibrate our TO-15 system, what our concentration units mean, and how to properly read our vacuum gauge while pressurizing samples. We are clearly going out of order here, because I have never covered how to prepare a working standard (necessary for ...


    By Restek Corporation

  • Case study - Pure oxygen injection pilot test

    Introduction: The Moccasin Bend WWTP uses pure oxygen produced by a cryogenic oxygen plant for activated sludge treatment of the influent waste stream, which consists of municipal and industrial wastes. The waste stream contains a high proportion of high strength industrial waste, which results in a typical COD loading of about 2000 mg/L, which is approximately four times the strength ...

  • ELITe InGenius a new Molecular Diagnostics Sample-to-Result solution and first fully automated sample-to-result solution introduced with transplant monitoring menu

    ELITe InGenius is an integrated sample to-result solution dedicated to Molecular Diagnostics which automatically performs extraction, amplification and result interpretation with an unprecedented flexibility and assay menu possibility. The system combines a universal extraction process in unitary cartridge with individual and independently controlled RT PCR in cassette based format enabling the ...


    By ELITech Group

  • Leader in sample preparation systems benefits from Axetris MFCs’ high dynamic range - Case Study

    Split ratio flexibility of GC injector increased 30-fold A leading manufacturer of analytical sample preparation systems in gas chromatography (GC) switched to Axetris MFCs - and in doing so, simplified their product range, while offering their customers at least 30 times more flexibility in split ratio. The market-leading dynamic range of Axetris mass flow controllers (MFCs)—with ...


    By Axetris Ag

  • An Overview Of STI Group’s Core Industrial Services

    It takes numerous specialists and engineers to manage industrial plants and facilities and keep them running smoothly, efficiently, and safely. Some of these individuals may only be required during special projects or industrial turnarounds when speed and efficiency are of the essence to get the plants back into production as quickly as possible. Other times industrial services are required on a ...


    By STI Group, Inc.

  • Case study - Geotech`s G100 verifies CO2 in NHS incubators

    About the customer Stockton Quality Control Laboratory, University Hospital of North Tees, England The lab provides microbiological, chemical, environmental and medical gas testing services Challenges the customer faced Before they had Geotech’s G100 CO2 incubator analyser, Stockton QC used a CO2 analyser with a collection of separate instruments for ...


    By Geotech

  • Case study - The convenient and reliable alternative to chemical-based gas measurement within your incubators

    With a typical laboratory having many incubators of different types and ages, checking CO2 and O2 levels is a challenge.  Even the most modern incubators need to be checked.  An electronic gas analyser offers a faster and more convenient method than historically popular chemical analysis.  Geotech looks at why their digital gas analyser, the G100, is fast becoming the go to product ...


    By Geotech

  • FTIR meets Fire Testing needs for toxic gas analysis - Case study

    One of the most dangerous aspects of a fire is the toxic gases that can arise from the process of combustion. To save lives and develop safer materials for airplanes, trains, and buildings, it is vital to identify and measure the gases that are released when products and materials are burning. The BASF Fire Technology Laboratory in Ludwigshafen, Germany, conducts fire testing on materials to ...


    By Gasmet Technologies Oy

  • We help you to handle highly active ingredients - Case Study

    Pharmaceutical research continues to develop more active ingredients and potent compounds. Thus the demands on containment in production installations are increasing and operator protection becomes even more important. The basic design of the AVA conical mixer and dryer allows for easy and effective containment. They are, by their very nature, self-contained systems. Agitator shaft bearings and ...


    By AVA GmbH u. Co. KG

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