What are summa canisters used for?
Summa canisters or similarly treated canisters are rugged containers designed to provide superior inertness and extended sample storage times. Evacuated canisters also do not require a sampling pump for sample collection.
How do you collect soil gas samples?
Soil gas samples should be collected in areas above where volatile chemical contamination in the soil or groundwater has been identified. Soil gas samples must be collected from a depth at least three feet below the ground surface or building foundation, but above the saturated zone.
What is Silonite?
Silonite™ is a ceramic coating treatment developed by Entech to provide an extremely inert surface for chromatography applications. Silonite™ creates an ultra-smooth surface which reduces the potential for chemical adsorption.
How do you use a Tedlar bag?
Open the plastic valve on the Tedlar bag slowly and fill the bag until it is about half full. Close valve and disconnect the bag. Label the bag with the sample identification and other information desired. Keep bags out of sunlight to present degradation of the sample.
What is active air sampling?
Active air sampling entails that air in a cleanroom is sampled kinetically during a manufacturing process. This is done continuously in a controlled way by counting the number of viable or living organisms per cubic metre of air. The raw materials and finished products require sampling and need to be sterile.
How many types of air sampling are there?
Active air sampling requires the use of a microbiology air sampler to physically draw a known volume of air over, or through, a particle collection device and there are two main types.
How often should air sampling be performed?
A: The answer varies based on how much you use the units and what your risk tolerance is, but generally every 6-12 months, with six months being optimal for more risk-averse organizations such as pharmaceutical and medical device companies that conduct daily sampling.
How is soil-gas measured?
A Gas Vapor Probe provides the most scientific method for measuring soil gases.
What is soil-gas survey?
Soil-gas surveys are defined as the collection, analysis, and interpretation of soil-gas data. Passive soil-gas surveys take several days or weeks to complete and are most useful where semivolatile organic compounds (SVOCs) are suspected or when soils prevent sufficient air flow for active sampling.
What is a Silonite canister?
All Entech canisters feature SiloniteTM, an ultra-inert ceramic coating that prevents exposure of target chemicals to catalytic metal surfaces and increases the range of recoverable compounds. This coating also ensures Entech canisters clean up faster than competitive canisters, saving you time and money.
How do Summa canisters work?
A summa canister is a stainless steel electropolished (or “summa” polished) passivated vessel used to collect a whole air sample. To collect a sample, the summa canister valve is opened and the canister is left in a designated area for a period of time to allow the surrounding air to fill the canister and achieve a representative sample.
What are the dimensions of a summa canister?
LabCommerce calls its 6-liter air sampling canister (which the market loosely refers to as summa canisters). 304L stainless steel vessel body, 304 SS. Swagelok SS-4H 316SS bellows valve. Maximum operating pressure: 41 psia. Six liters nominal. Approximately 6 lbs. (2.5 kgs.) Approx. 12.38 in. (31.4 cm) H x 9 in. (22.9 cm) diameter.
What is an air sampling canister?
An air sampling canister is a container for collecting a whole air sample. A canister may be spherical or cylindrical and is constructed of specially treated stainless steel. The canister is prepared for sampling by evacuating the contents to a vacuum of approximately 29.9 inches of Mercury (in Hg).
What is ambient air sampling?
Ambient Air Sampling. If we suspect there is a mold problem within a home, an ambient air sample is typically collected in the suspect area, and then compared to an outside sample (control or baseline sample) collected at that same day and time. When we start to see spikes in the quantities and/or types of mold spores,…
