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• 12 •
www.restekcorp.comRESTEK Advantage
800-356-1688
Canisters Optimized for Air Sampling
by EPA Methods TO-14 and TO-15
By Donna Lidgett, Air Sampling Products Marketing Manager
✔
SUMMA
®
canister equivalent.
✔
Excellent analyte recovery — even after 14 days of storage.
TO-Can
™
Canisters for EPA Methods TO-14 and TO-15
volume
qty.
cat.#
1L
ea.
24150
3L
ea.
24152
6L
ea.
24153
15L
ea.
24154
Chromatogram courtesy of Gina Maio, Severn Trent Laboratories, Inc., Burlington, VT.
Figure 1
- TO-Can
™
canisters ensure excellent recovery for TO-14/TO-15 compounds, even after 14 days of storage.
Feature
US Environmental Protection Agency (EPA)
Compendium of Air Methods TO-14 and TO-15
regulate the collection, storage, and analysis of
volatile organic compounds (VOCs) using treated
air sampling canisters.
Restek offers a line of TO-Can
™
canisters (SUMMA
®
can equivalent), which are electropolished and
extensively cleaned using proprietary processes.
This ensures a high-quality, passivated surface to
maintain stability of the TO-14/TO-15 compounds
during storage. The design of the frame surround-
ing the electropolished canister eliminates welds
on the sphere, thereby eliminating active sites. A
Parker Hannifin metal-to-metal diaphragm valve
further improves the performance of the canister.
To collect VOCs in ambient air, TO-Can
™
canis-
ters should be cleaned and evacuated prior to
being sent to the field. In the field, the sample is
drawn through a sampling train that regulates
the rate and duration of sampling. The TO-Can
™
canister is then sent to the analytical laboratory.
In the laboratory, a known amount of sample is
drawn from the canister and concentrated onto a
trap. The sample is analyzed according to
Method TO-14/TO-15, typically using a 60m,
0.32mm ID, 1.0µm Rtx
®
-1 capillary column in a
GC/MS system.
To show the inertness of these canisters, and how
well they meet the holding time criteria for Methods
TO-14/15, a 62-component TO-15 standard
(10ppbv) was injected into a TO-Can
™
canister and
humidified to 70% relative humidity. The standard
was analyzed on day 1, day 7, and day 14. The TO-
Can
™
canister ensured excellent stability for these
polar and non-polar compounds, even after 14
days of storage (for data, request lit. cat.# 59189).
We also offer sampling kits, sampling bags, thermal
desorption tubes, and a range of gas reference
standards to meet your environmental gas sampling
requirements.
Vacuum/pressure gauge (optional).
Variety of sizes.
Temperature stability to 250°C.
High-purity,
2
/
3
-turn valve with stainless steel diaphragms.
No sample adsorption, for more accurate results; easy to use.
Indicates internal conditions.
Meet a range of sampling needs.
Higher temperature cleaning saves time.
Benefit
TO-Can
™
Canisters with Vacuum/Pressure Gauge
volume
qty.
cat.#
1L
ea.
24155
3L
ea.
24156
6L
ea.
24157
15L
ea.
24158
Rtx
®
-1 column, 60m, 0.32mm ID, 1.0µm (cat.# 10157).
Sample:
200mL of 10ppbv TO-15 standard (cat.# 34436), injected into TO-Can
™
canister and humidified to 70% RH.
Concentrator:
Nutech 3550 Preconcentrator
200mL of sample concentrated at 160°C, thermally desorbed at 150°C, and cryofocused at 185°C.
Oven Temp.:
30°C (hold 4 min.) to 175°C @ 9°C/min. to
220°C @ 40°C/min.
Carrier Gas:
helium @ 1.2mL/min.
Det.:
Agilent 5971 MS
Scan Range:
35-265amu
For peak indentifications, request
Applications Note #59189.
For more information, request our Air Monitoring
Products Catalog (lit. cat. #59661A).
For information about environmental gas
reference mixes, request lit. cat.#59276A.