Vapor Sampling Articles
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Techniques for Chromatography Testing and Mass Spectrometry
Chromatography testing and mass spectrometry are two analytical techniques widely used in scientific research, pharmaceuticals, food safety, environmental analysis, and forensic investigations. These techniques play a crucial role in identifying and quantifying chemical compounds, determining the purity of substances, and understanding molecular structures. In this article, we will explore the ...
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5 Benefits of Custom Gas Mixers for Chromatography Calibration
Gas chromatography (GC) is one of the main techniques in separation science. It is used to analyze and quantify the individual constituents of sample mixtures by first vaporizing the sample and injecting it into a column filled with a solid or semi-solid packing media. Different components elute from the column at different rates based on their unique physicochemical properties and their ...
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Did you know ? Monitoring and analysis of contaminants in liquids
The airmoVOC WMS is a unique and efficient product for monitoring and analysis in liquids. This Mcerts certified solution measures and analyzes VOCs and BTEX (Benzene, Toluene, Ethylbenzene and Xylene) dissolved in liquid matrices. Chromatotec presents a headspace sampling system (following US EPA method 502-2) designed to extract representative samples from a liquid phase. The vaporized sample ...
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How does Nafion Solve Humidity Challenges?
Nafion is a polymer that add/remove select materials, including water vapor, to a gas stream through a first order kinetic reaction (a chemical reaction). Because it’s non-porous, other molecules cannot pass through it. This unique property makes it ideal for medical applications such as removing water vapor from breath samples or adding humidity to gas samples for therapeutic purposes. ...
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What Humidity Challenges do Engineers Face?
When designing medical equipment, engineers can often feel like Goldilocks when it comes to humidity: there’s too much or too little—and their challenge is to make it just right. Too Much Humidity is a Frequent Problem The air (or a gas) can only hold so much water vapor. Depending on external factors like temperature and pressure, water vapor can condense and create lot of ...
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Residential Property UST Spill - In-Situ Chemical Oxidation - Case Study
An underground storage tank containing heating oil had leaked off-site onto a residential property and migrated under the building foundation. Impacts under the basement resulted in vapour intrusion in the basement and free product in property ...
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Gas Analysers for Fuel Cell Research
Electrochemical fuel cells are envisaged as a potential successor technology to combustion engines in the automotive sector. Although studies have considered numerous gaseous elements as the fuel source for electrochemical stacks, hydrogen (H2) remains the primary element of interest in automotive engineering. Gas analysers have proven instrumental in demonstrating the advantages and drawbacks of ...
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Teflon fep Tubing for soil gas sampling
Suniu manufactures(in China) teflon fep tubing right for soil vapor sampling. By DTSC, teflon fep tubing is approved for soil gas sampling tubing. Our tube is without PFOA. It will be cleaned according to Class 6 of ISO146441(cleanroom standard). So there is almost ZERO moisture and no chemical contaminants in tubing. It will helps you get right result when collects soil vapor samples. Suniu ...
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Vapor Intrusion Testing/Sampling in Buildings
What is Vapor Intrusion? Vapor intrusion occurs when volatile chemicals lodged in soil or groundwater rise to the surface and are released into the air. This can occur in the open air or into buildings, offices, factories, warehouses, vacant, or abandoned. Vapor intrusion testing/sampling is a method of determining if known or suspected ground contamination is a result in these chemical vapors ...
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Testing-Sampling Indoor Air Quality in an Office Including Vapor Intrusion
Indoor Air Quality in an office often leaves much to be desired. Complaints of poor air quality resulting in headaches, dizziness, burning eyes, upper respiratory irritation, coughs, colds, bloody noses, are not uncommon even in new buildings that supposedly have well-designed Heating, Ventilation, and Air Conditioning (HVAC) Systems. Humidity, Temperature or HVAC System? It may be as simple as ...
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UK Health and Safety Laboratory samples with Axetris mass flow controllers - Case study
Proficiency testing ensures workplace & consumer safety The Health and Safety Laboratory (HSL) runs a state-of-the-art atmosphere generation system for recreating polluted atmospheres and accurate loading of standards of hazardous materials such as VOCs. These standards are used for conformity testing by participating laboratories as part of proficiency testing schemes. Axetris' mass flow ...
By Axetris AG
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Quality Leader in Thermal Analysis depends on Axetris Mass Flow Solutions - Case study
Pushing the limits of Thermal Analysis using Axetris MFCs An international quality leader for Thermal Analysis solutions relies on Axetris mass flow controllers (MFCs) and has done so for many years. Axetris mass flow solutions help maximize performance while using analysis techniques such as Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Accurate and ultrafast ...
By Axetris AG
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Vapor Intrusion – Health Hazards from Below
What Exactly is Vapor Intrusion? Vapor intrusion is the condition where contamination in soil or groundwater rises to the surface and penetrates into the building above. The source of the vapor intrusion can be as varied as the chemicals themselves. Soil Contamination Soil contamination could be from a former chemical manufacturer on the site where buildings were torn down and new structures ...
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On the Ground with Diesel Corrosion - Case Study
When the EPA revealed the results of its study in July on the increasing presence of substantial corrosion in diesel fuel tanks, it proved that the problem is much larger than anyone anticipated. The facts are staggering: 83%of the diesel tank systems exhibited moderate-to-severe corrosion. 75%of the owner/operators of those diesel tanks had no idea it was happening. The corrosion is ...
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Managing site data and the maintenance of conceptual model and time series outputs at a complex site over an extended period - Case Study
Background Leakages of TCE and the subsequent groundwater contamination at an industrial facility in Adelaide have led to an ongoing investigation and remediation program conducted since 1999. This work comprised site characterisation and remediation, including borehole drilling, monitoring well installation, soil, groundwater and vapour sampling, laboratory analysis and preliminary in-situ ...
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An Inert Desolvating Nebulizer System for Reduction of Matrix‐Induced Oxide Interferences on Rare Earth Elements, Iridium, and Platinum Using Quadrupole Inductively Coupled Plasma Mass Spectrometry
ABSTRACT This application note will examine the use of an inert low-flow desolvating nebulizer system for reduction of oxide mass spectral interferences that can occur in quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS). This nebulizer system uses an inert, low-flow nebulizer (100 microliters/min) coupled to an inert, heated membrane desolvator for efficient water vapor removal ...
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An Inert Desolvating Nebulizer System for Reduction of Matrix‐Induced Oxide Interferences on Rare Earth Elements, Iridium, and Platinum Using Quadrupole Inductively Coupled Plasma Mass Spectrometry
ABSTRACT This application note will examine the use of an inert low-flow desolvating nebulizer system for reduction of oxide mass spectral interferences that can occur in quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS). This nebulizer system uses an inert, low-flow nebulizer (100 microliters/min) coupled to an inert, heated membrane desolvator for efficient water vapor removal ...
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Increase Mercury Vapor Detection Range by 10X
Vapor dilution module extends detection range of J505 from nanograms to milligrams How it works: The new 10:1 dilution module for the J505 reduces the concentration of mercury vapor in the sample stream by a factor of ten, allowing for a much higher detection limit. Rather than the standard upper detection limit of 500 µg/m3, the new J505 dilution module lets you detect mercury vapor ...
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How can I finely control the vacuum applied by my vacuum pump or system?
Some vacuum pumps or built in vacuum systems do not allow fine control over the vacuum applied. For rough work like vacuum filtration this is not always needed, but for more sensitive work, for example when using a rotary evaporator, application of the correct vacuum level is essential to smooth operation. The new VC900 vacuum controller by KNF is compatible with all vacuum pumps and systems ...
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Analysis of Isocyanates using the ASSET EZ4-NCO Dry Sampler
Introduction Isocyanates are used as a raw material to produce a number of products such as automotive paints, rigid and spray foam insulation, and furniture. 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 ...
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