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www.restekcorp.comTO-Can
™
Air
Monitoring Canisters
Optimized for EPA Methods T0-14 and TO-15
US Environmental Protection Agency (EPA)
Compendium of Air Methods TO-14 and TO-15 reg-
ulate the collection, storage, and analysis of volatile
organic compounds (VOCs) using treated air sam-
pling canisters. Restek now offers a complete line
of TO-Can
™
canisters (SUMMA
®
can equivalent),
which are electropolished using a proprietary
by David Shelow, Air Monitoring Innovations Chemist
process and extensively cleaned using an ultrasonic
method. This ensures a high-quality, passivated sur-
face to maintain stability of the TO-14/TO-15 com-
pounds during storage. Also, the design of the
frame surrounding the electropolished canister
eliminates the need for weld marks on the sphere,
thereby preventing active sites on the canisters. And
the addition of a Parker Hannifin metal-to-metal
diaphragm valve further improves the performance
of the canister.
To collect VOCs in ambient air, the TO-Can
™
canis-
ters should be pre-cleaned and pre-evacuated prior
to being sent to the field. Once in the field, the sam-
ple is drawn through a sampling train that will reg-
ulate the rate and duration of sampling. The
TO-Can
™
canister is then sent to an analytical labo-
ratory for analysis. In the laboratory, a known
amount of sample is drawn from the canister and
concentrated onto a concentrating trap. The sample
is analyzed according to Method TO-14/TO-15, typi-
cally using a 60m, 0.32mm ID, 1.0µm Rtx
®
-1 capil-
lary column and a GC/MS system.
60m, 0.32mm ID, 1.0µm Rtx-1 (cat.# 10157). 200mL injection of a 10ppbv TO-15 standard (cat.# 34436), made in 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 identifications, request Applications Note #59189.)
Chromatogram courtesy of Gina Maio at Severn Trent Laboratories, Inc., Burlington, VT.
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9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 min.
Figure 1
TO-Can
™
canisters ensure excellent recovery for TO-14/TO-15 compounds, even after 14 days of storage.
To show the stability 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 demonstrated excellent stability for
these polar and non-polar compounds. The result-
ing analysis shows excellent stability after 14 days
storage of the compounds (Figure 1).
✔
TO-Can
™
Canisters
size (L)
cat.#
1
24150
3
24152
6
24153
15
24154
✔
TO-Can
™
Canisters with
Vacuum/Pressure Gauge
size (L)
cat.#
1
24155
3
24156
6
24157
15
24158
for
more
info
including complete stability test data,
request Applications Note #59189.
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BFB
GC_EV00379
Restek also offers SilcoCan
™
canisters for
the analysis of low-level sulfur compounds.
For more information on SilcoCan
™
canisters, request Fast Facts #59311.
✔
SUMMA
®
can equivalent
✔
Excellent recovery—even after
14 days of storage
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