Diffusive Sampling News
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Sampling of Carbonyls - A Sampling Media Perspective
Formaldehyde, acetaldehyde, glutaraldehyde and acetone are the most commonly sampled carbonyls. These compounds are collected onto sampling media treated with 2,4-dinitrophenylhydrazine (DNPH) that derivatize the carbonyls to the more stable hydrazone derivatives. The derivatives are then measured by reversed-phase HPLC combined with UV detection. There are several analytical methods available to ...
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The Advantages of Passive Groundwater Sampling
Since passive groundwater sampling was introduced over 20 years ago, the reliable, cost-effective sampling collecting alternative to groundwater purging has gained wide acceptance by environmental regulators and consultants. This form of groundwater sampling allows the collection of a representative sample from a discrete position within the well screen without active groundwater transport ...
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Passive Groundwater Sampling – The Proven Alternative to Well Purging
By David Kaminski, Senior Vice President & Sandy Britt, Senior Hydrogeologist - QED Environmental Systems, Inc. Selecting groundwater sampling technology for any particular application can be challenging, as there is a wide range of technology available on the market, and some are far more effective than others. The traditional approach of pumping a well to remove “stagnant” ...
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Better Remediation Through Effective Groundwater Sampling
One of the keys to successful remediation of a contaminated property is effective groundwater sampling. A new ASTM standard will aid groundwater samplers by taking a look at three types of passive samplers and their advantages, disadvantages and limitations. The new standard is D7929, Guide for Selection of Passive Techniques for Sampling Groundwater Monitoring Wells. The three types of samplers ...
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EPA outlines next steps at the capital city plume site in Montgomery, AL
EPA will communicate to building owners and the general public the results of indoor air quality and outside soil vapor sampling that took place in mid-August 2011 as soon as those results are available. If warranted by the results of the sampling data, EPA may undertake additional sampling and/or mitigate exposure to contaminants through indoor air utilizing its emergency response authority. ...
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Speed is the name of the game as Enviro Technology launches rapid diffusion samplers
Local authorities and businesses seeking fast, cost effective air monitoring need look no further than air quality monitoring specialists, Enviro Technology’s brand new range of Rapid Diffusion Samplers. Ideal for all rapid indoor, outdoor, personal and workplace air monitoring of volatile organic compounds (VOCS) and Nitrogen Dioxide, Rapid Diffusion Samplers offer a quick, low cost, ...
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COV GAS BADGE
GABIE COV gas bage is a passive diffusion sampler using adsorption on a solid (activated charcoal) and desorption by a solvent followed by analysis of the desorbed solution (Type A from new EN 838 standard). GABIE (Gas Adsorbent Badge for Individual Exposure) is an individual passive collection badge. It makes it possible to simultaneously sample a multitude of organic gases and vapors that may ...
By Tecora
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New addition to air quality armoury from Enviro Technology Services
An innovative air quality monitoring system has been installed at Bristol’s Old Market, allowing ET and Bristol City Council to compare the device’s performance with existing equipment. Stroud-based Enviro Technology working in partnership with Bristol City Council has installed a TrafficBOx compact Air Quality Monitoring System at Old Market for evaluation purposes. Because the TrafficBOx is ...
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