Figure1
TO-Can™ canistermaintains excellent stability forTO-14/TO-15 compounds at 10ppbvafter 14days.
TO-Can
™
AirMonitoringCanisters
Long-TermStabilityof TO-14/TO-15Compounds
APPLICATIONS
NOTE
USEnvironmental ProtectionAgency (EPA)Compendiumof AirMethodsTO-14/TO-15 are designed to regulate the collection,
storage, and analysis of atmospheric volatile organic compounds (VOCs) using treated air sampling canisters.RestekTO-Can™
canisters are electropolishedusing aproprietaryprocess and extensively cleanedusing anultrasonicmethod—treatments that
ensure ahigh-quality, passivated surface tomaintain stabilityof theTO-14/TO-15 compounds during storage.The designof the
frame surrounding the electropolished canister eliminates theneed forweldmarks on the sphere,which canbe focal points for
VOCbreakdownor adsorption.AParkerHannifinmetal-to-metal diaphragm valve further ensures the reliable performance of
the canister.
To collectVOCs in ambient air,TO-Can™ canisters shouldbe cleaned and evacuatedprior tobeing sent to the field. In the field,
the sample is drawn through a sampling train thatwill regulate the rate anddurationof sampling.TheTO-Can™ canister is then
sent to an analytical laboratory,where a known amount is drawn from the canister, concentratedon a concentrating trap, and ana-
lyzed according toMethodsTO-14/TO-15, typicallyusing a 60m, 0.32mm ID, 1.0µmRtx®-1 capillary column in aGC/MS system.
TO-Can™canistersmeet theholding timecriteria forMethodsTO-14/TO-15
A62-component TO-15 standard (10ppbv)was injected into aTO-Can™ canister andhumidified to70% relative humidity.The
standardwas analyzedonday 0, day 7, andday 14of storage.Table I (page 2) shows the results of the study.TheTO-Can™ canis-
ter ensured excellent stability for these polar andnon-polar compounds.The analysis on anRtx®-1 column shows excellent reso-
lution andpeak shapes (Figure 1).
Rtx
®
-1 60m, 0.32mm ID, 1.0µm (cat.# 10157).
Sample:
200mL of 10ppbvTO-15 standard, injected intoTO-Can
™
canister, humidified to 70%RH, stored 14 days.
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 4min.) to 175°C@ 9°C/min. to 220°C@ 40°C/min.
Carrier gas:
helium@ 1.2mL/min.
Det.:
Agilent 5971MS
Scan range:
35-265amu
(seeTable I on page 2 for peak identifications)
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23 min.
1
3
4
5
6
7
8
9/10
11
12
13
14
15
16
17
18
19
20
21
22/23 24
25
26
27
28
29
30
31
32
33
34
35/36
37
38
39
40
41 42
43 44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60 61
62
63
BFB
GC_EV00379
2
Chromatogram courtesy of GinaMaio, SevernTrent Laboratories, Inc., Burlington, VT.
TurningVisions intoReality
™
800-356-1688 • 814-353-1300
20
YEARS
