Restek 2011/12 Chromatography Catalog - page 410

410 www.restek.com
SAMPLE HANDLING | AIR MONITORING
Canisters
SilcoCan® canisters effectively store very low levels of sulfur compounds.
Whether you are monitoring for TO-14A, TO-15, or reactive sulfur compounds,
SilcoCan® canisters are your best choice for inertness. In Tedlar® bags, the stability of
low-level (100 ppbv) 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 (1–20 ppbv), under dry or
humid conditions. The versatility of the SilcoCan® canister makes it an excellent choice
for collecting and storing TO-14A or TO-15 compounds.
SilcoCan® Air Monitoring Canisters
Ideal for low-level reactive sulfur (1-20 ppb), TO-14A, 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 fromwww.restek.com). 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 H2S
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.
Canisters are the gold standard for
ambient VOC monitoring.
also available
We also offer sampling kits, sampling bags,
and a range of gas reference standards to
meet your environmental gas sampling
requirements. See pages 414-432.
• High quality, metal-to-metal seal, 2/3-turn valve with stainless steel diaphragms.
• Sizes to support a wide range of sampling needs.
• 2-port or 3-port valve available; 3-port valve includes -30" Hg/60psi
vacuum/pressure gauge (other gauges available).
• Unsurpassed inertness, even for sulfur-containing or brominated compounds.
• For critical applications, order a Siltek® treated valve—add suffix “-650” to the
catalog number of the canister.
*Range of standard gauge is -30"Hg to 60psi.
For additional gauge and valve options, see pages 412-413.
24182
Get the ultimate insurance plan—
order your SilcoCan® canister with a
Siltek® treated valve.
1L Volume 3L Volume 6L Volume 15L Volume
Description cat.# price cat.# price cat.# price cat.# price
Parker Diaphragm Valve
w/ Parker Diaphragm Valve 24180 24181 24182 24183
w/ Parker Diaphragm Valve,
Siltek Treated 24180-650 24181-650 24182-650 24183-650
w/ Parker Diaphragm Valve,
and Gauge* 24140 24141 24142 24143
w/ Parker Diaphragm Valve,
Siltek Treated, and Gauge* 24140-650 24141-650 24142-650 24143-650
without Valve 22090 22091 22092 22093
Website :www.chromtech.net.auE-mail :info@chromtech.net.auTelNo : 03 9762 2034 . . . in AUSTRALIA Mar 2011