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Gas Sample Bags
Reliable Gas Bag Sampling
Gas sample bags are a convenient and accurate means of gas and
vapor samples in air. This is particularly true in areas where
the concentration is above the detection limits of common analytical
instruments. Many chemical hazards can be effectively collected
by sample bags. But, while the collection method is simple, the
selection of the bag, fittings, and tubing is critical. |
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Applications for Gas Bag Sampling
- Groundwater testing
- Grab sampling for general industry
- Stack sampling
- Hazardous waste site sampling (TCLP)
- Assessing exposures from leaks and spills
- Indoor air sampling (CO/CO2 )
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- Sampling from vents or flues
- Calibration gases standards
- Leaking underground storage tanks
- Soil gas sampling
- Gas blending
- Measuring anesthetic gases in operating rooms
- Gas and vapor sampling
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When sampling for light-sensitive compounds,
use black and clear layered Tedlar® bags.
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Use only Teflon® tubing
and Teflon-lined septums for bag sampling.
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Flush the bag thoroughly with purified
air or nitrogen before using.
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Do not use bags to collect unstable or
highly reactive compounds.
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Do not ship sample bags by air unless
the cargo cabin is pressurized.
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Avoid filling the bag more than 80%
of its maximum volume. At the end of the sampling period, turn
the pump off and close the valve on the bag.
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Avoid overfilling bags |
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Sample bags are not intended for the storage of
hazardous materials. If you suspect that your sample bags may
contain hazardous materials in concentrations above the safe
levels defined by NIOSH, OSHA, or DOT, you may need to refer
to special federal and state packaging and transportation regulations. |
Sample
Bag FAQs
Always available
we guarantee it!
As the world's largest producer of sample bags, we maintain large stocks of sample
bags in all sizes at our three U.S. warehouses. If we are unable to meet your
order requirements, we will:
offer a suitable replacement at no additional cost
or
arrange shipment from one of our other locations
Why SKC Gas Sample Bags are the #1 Choice
- Unique seam construction and eyelets
- Strong, evenly sealed seams hold up to the toughest of sampling conditions
- Stainless steel eyelets available for easy transportation and storage
- Suitable for liquid, vapor, or gas samples
- Leak-tested
- Unmatched customer service and technical support
- Fast, friendly, personalized service
- Free technical support
- Our standard is 100% satisfaction, 100% of the time
- Superior packaging
- Custom-designed boxes assure safe delivery
- No Styrofoam™ filler or plastic packaging to contaminate
the bags
- Widest selection of sizes
- Thirteen sizes stocked for immediate delivery
- Unlimited custom sizes and configurations
- Continuous production means SKC's bags are stocked for immediate
delivery
- Superior fittings
- Designed specifically for bag sampling.
- Lowest prices and quantity discounts
High Quality Materials
Tedlar ®
Unlike other sample bag materials, Tedlar film resists gas permeation - both
into and out of the bag. This assures sample integrity and valid data for all
applications.
- Tough & Flexible
Tedlar film retains its tensile strength and toughness allowing for reuse
and a long service life for many applications. Tedlar is rated for continuous
use from -98 to 225 F. This wide range of operation allows for use in very
cold or very hot environments including stacks, vents, and flues.
- Chemically Inert
Tedlar film is inert to a wide range of chemicals. Since Tedlar will not
react with or alter the composition of collected chemicals, sample integrity
is assured.
Tedlar Sample Bags
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These industry standard sample bags utilize a lightweight, patented single
fitting of inert polypropylene that combines the hose/valve and the septum
holder into one compact fitting.
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These economical sample bags feature a unique stainless steel fitting that
reduces the overall weight of using stainless steel by combining the hose/valve
and septum fittings into one easy-to-use unit.
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This flexible bag system features two stainless steel fittings: the hose/valve
for flushing, filling, and sealing the bag;and, the septum with a syringe
port for removing samples for analysis. The fittings are easy-to-use
and provide sampling flexibility and reliability.
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For grab sampling where only a small sample is needed for analysis such
as gas chromatography, these mini sample bags feature a single syringe
port fitting with a Teflon-lined septum for filling and emptying the
bag. The bags are manufactured in sets of 5 or 10 bags to a sheet. |
Black and Clear Layered Tedlar
- For Light-sensitive Compounds
Frequently used for light-sensitive compounds, black and clear layered Tedlar
sample bags eliminate the need for cumbersome outer containers to protect
the sample. The SKC black and clear layered Tedlar bag combines a standard
2-mil clear Tedlar film inside a black layered Tedlar bag for convenient
protection of light-sensitive compounds, while maintaining the integrity
of the sample.
Layered Tedlar Sample Bags
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The SKC black and clear layered Tedlar bags are available with either
a single stainless steel or Teflon fitting that combine the hose/valve
and the septum holder into one compact fitting. |
Teflon ®
Sample bags made of Teflon, the most chemically-inert sample bag material, offer
the ultimate performance in bag sampling. Teflon performs well under severe temperature
conditions, from cryogenic to high temperatures, and is insoluble in all solvents
below 300 C.
- Wide Temperature Range
Teflon bags are ideal for stack sampling. Teflon film performs over the temperature
range of -400 to 400 F (-240 to 205 C) which is suitable for all stack
sampling applications..
- Inert to a Broad Range of Chemicals
Teflon is the most chemically-inert of all the plastics. In fact, Teflon
film is solvent-resistant to virtually all chemicals except molten alkali
metals, fluorine at elevated temperatures, and certain complex halogenated
compounds such as chlorine trifluoride at elevated temperatures and pressures.
Teflon Sample Bags
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Gas sample bags made of Teflon are the most chemically-inert of any bag
material and offer the ultimate performance in bag sampling. The Teflon
fitting combines the hose/valve and the septum holder into one compact
fitting.
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All the benefits of Teflon, the most chemically-inert bag material, plus
convenience and economy of stainless steel fittings. The single stainless
steel fitting combines the hose/valve and the septum holder into one
compact fitting.
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FlexFoil Grab Bags
- For Sampling Low Molecular Weight Compounds
FlexFoil Grab Bags provide light and moisture protection for low molecular
weight compounds such as hydrogen that are unstable when collected into
standard
Tedlar bags. To prevent permeation in and out of the bags, SKC FlexFoil
Grab Bags are specially designed with four layers of material. The inside
surface
is inert, minimizing absorption and adsorption of compounds.
FlexFoil Grab Bags
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SKC FlexFoil grab bags are available with either a single inert polypropylene
or Stainless Steele fitting that combine the hose/valve and the septum
holder into one compact fitting. |
SamplePro FlexFilm — Only from SKC!
The new SKC SamplePro™ FlexFilm bags are constructed of SKC proprietary
material ideally suited for collecting air samples. Manufactured exclusively
for SKC, FlexFilm features lower VOC background and shows the same sample stability
for VOCs as seen with Tedlar. When combined with a patented lightweight all-in-one
polypropylene fitting, the result is a sample bag with lower background, longer
storage times for many VOCs, and the greatest ease of use
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SKC SamplePro FlexFilm bags are available with a single inert
polypropylene fitting that combines the hose/valve
and the septum
holder into one compact fitting. |
Specialty Sample Bags
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For the EPA's Toxicity Characteristic Leaching Procedure (TCLP). |
Tedlar Bag Accessories
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The SKC Vac-U-Chamber is a rigid air sample box allowing the direct filling
of an air sample bag using negative pressure provided by most personal
air sampling pumps.
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An easy way to take quick bag samples, the SKC Vac-U-Tube is an acrylic
syringe with a removable face plate that allows a specially-designed 0.7
L Tedlar bag to be placed inside. |
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Use only Teflon tubing for bag sampling to prevent loss through adsorption
to the tubing surface |
Custom Bags
Made to Your Specifications
For custom applications, SKC will manufacture Tedlar
bags
to meet your specific
requirements. Download the Custom
Sample Bags Order Form in PDF format. (If you don't have the
PDF reader. Click here to go to the
Adobe website and download the reader. ) Complete the form and fax it to
your SKC representative.
Contact your SKC
representative for more information or call the SKC Sales Department at 724-941-9701
for a quotation on custom bags.
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- Sized to your specifications
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- Single or multiple cells
- Choice of fittings
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- Stainless steel
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- Polypropylene
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- Nickel-plated brass
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- Teflon
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- Choice of bag materials
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- Standard 2-mil Tedlar
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- Black and clear layered Tedlar
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- Teflon
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This page was last modified January 18, 2008
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