Figure 1
SilcoCan™ canisters effectively store very low levels of sulfur compounds.
AIR MONI TORING
Si lcoCan™ Canisters
4
Phone: 800-356-1688 or 814-353-1300
did you
know
?
SilcoCan™ Canisters are
cleaned prior to shipping.
•
Excellent stability for
long-term storage of
sulfur-containing volatile
organic compounds.
•
More accurate sampling.
Whether you are monitoring for TO-14, TO-15, or reactive sulfur compounds, SilcoCan™ canisters are
your best choice for inertness. In Tedlar® bags, the stability of low-level (100ppbv) sulfur volatile organic
compounds (VOCs) is poor, even within 24 hours of sampling. Sulfur compounds react with the metal
surface in electropolished canisters, so these canisters are unsuitable for collecting and storing low-level
sulfur VOCs. SilcoCan™ air monitoring canisters, which feature a Siltek® treated surface, offer excellent
storage stability for sulfur VOCs at very low levels (1–20ppbv), under dry or humid conditions. The ver-
satility of the SilcoCan™ canister makes it an excellent choice for collecting and storing TO-14 or TO-15
compounds (Figure 2).
SilcoCan™ Air Monitoring Canisters
Ideal for low-level reactive sulfur (1-20ppb), TO-14, or TO-15 compounds
Standards: Dry standards were made by adding 2mL of a 100ppm stock sulfur standard to each precleaned and
evacuated canister, then pressurizing to 30psi with ultra-pure nitrogen. The resultant concentrations are listed
in Applications Note #59347A (download your free copy from
). Humidified standards were
made by injecting 100µL of deionized water into the evacuated canisters prior to adding 2mL of stock standard.
This produced 50% RH.
GC Column: Rtx
®
-1 , 60m, 0.53mm ID, 7.0µm; Detector: Sievers Model 355 Sulfur Chemiluminescence Detector
Dry SilcoCan™ (n=18)
Humidified SilcoCan™ (n=5)
Electropolished (n=2)
●
◆
▲
Time (Days)
Time (Days)
Percent Recovery
Percent Recovery
11 ppbv H
2
S
Time (Days)
Percent Recovery
10 ppbv COS
11 ppbv methyl mercaptan
Features
Benefits
Siltek
®
treated.
High-purity,
2
/
3
-turn valve with stainless steel diaphragms.
Vacuum/pressure gauge (optional).
Variety of sizes.
Stable to 250°C.
Siltek
®
valve available (add suffix “-650” to cat.#).
High inertness—ensures sample stability.
No sample adsorption at the valve, for more accurate
results; easy to use.
Ascertain internal conditions at a glance.
Meet extensive range of sampling needs.
Heat canister to 250°C for superior cleaning.
Completely passive sample pathway for maximum sample stability.
Newest surface technology
To ensure sample stability,
SilcoCan™ canisters are
deactivated with Restek’s innovative
Siltek® surface treatment, which
chemically bonds a fused silica
layer to the metal inner surface
of the canister. This layer offers
unsurpassed inertness for active
compounds, including polar and
sulfur-containing molecules. It will
not crack, chip, or flake off, despite
harsh handling in the field or during
transport.
Optional gauge
• Quickly confirm vacuum or pressure
inside canister.
• Monitor pressure changes.
• Fully protected by canister frame.
• Can be heated to 90°C during cleaning.
Serial-controlled label
For quick, sure identification.
Enhanced valve and
canister bracket
Canister holder and valve
bracket protect canister,
tube stub, and valve.
1
/
4
" tube stub
Allows user to interchange
valves.
Canisters are the gold
standard for ambient
VOC monitoring.
4
Website ;
Email :
Tel No : 03 9762 2034 in AUSTRALIA
