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2003 Volume 3
800-356-1688
✔ Efficiently controls foam; effective
over a wide pH range.
✔ Add an antifoaming agent, rather than
diluting the sample, to ensure lower
detection limits.
✔ Effective at less than 0.1% of sample
volume.
Methods for monitoring volatile organic compounds
(VOC) in waste streams, such as US EPA methods 624
and 8260, involve purge & trap techniques. Often,
foam is generated as the purge gas passes through the
sample. Foam can enter the analytical trap and poten-
tialy be carried into the GC column. Silica/silicone
antifoam agents easily control polyglymes and alkaline
detergent-based foams, the most commonly encoun-
tered foams in these analyses. Our new silica-contain-
ing antifoam agent generally is effective at very low
concentration: 1µL per 5mL.1 By eliminating the need
to dilute samples, it allows lower detection limits.
1 Good laboratory practices call for assaying an antifoam
blank as a control.
Miniature Air Sampling Canisters
✔ 400cc — ideal for indoor air, personal, emergency response, or soil
gas sampling.
✔ Available with quick-connect fitting that is compatible with sampling and
analysis instruments.
✔ Also available with non-treated or Sulfinert™-treated valve.
These small canisters are designed for controlled sampling, such as personal air sampling, as an alternative to
tube and pump samplers.
Restek offers these products in stainless steel or with Sulfinert™ coating for greatest inertness. We continue to
offer passive coating technologies that are unmatched in the air sampling industry—try a Sulfinert™ -treated
canister and achieve the ultimate in analyte stability.
Miniature Air Sampling Canisters with Quick-Connect Stem Fittings
Description Volume qty. cat.#
Electro-Polished Miniature Canister with Quick-Connect Stem Fitting 400cc ea. 24188
Sulfinert™-Coated Miniature Canister with Quick-Connect Stem Fitting 400cc ea. 24189
Sulfinert™-Coated Miniature Canister with Sulfinert™-Treated Quick-Connect Stem Fitting 400cc ea. 24190
Miniature Air Sampling Canisters with Metal-Seated Diaphragm Valve
Description Volume qty. cat.#
Electro-Polished Miniature Canister with Metal-Seated Diaphragm Valve 400cc ea. 24191
Sulfinert™ -Coated Miniature Canister with Metal-Seated Diaphragm Valve 400cc ea. 24192
Sulfinert™ -Coated Miniature Canister with Sulfinert™-Treated Diaphragm Valve 400cc ea. 24193
Fittings for Miniature Air Sampling Canisters
Description qty. cat.#
Quick-Connect Stem Fitting ea. 24185
Sulfinert™-Treated Quick-Connect Stem Fitting ea. 24186
Quick-Connect Body Fitting ea. 24187
Metal-Seated
Diaphram Valve
Miniature
Canister
Quick-Connect
Stem Fitting
Quick-Connect
Body Fitting
New Reference Materials
Purge and Trap Analysis – Environmental – Forensics
Antifoam Agent for Purge & Trap Samples
Neat, 1mL/ampul
Each 5-pk.
31822 31822-510
Antifoam Agent for Purge & Trap Samples Explosives Standard
✔ Propylene glycol dinitrate (PGDN),
the main component of Otto Fuel II
for torpedoes and other weapons.
✔ Convenient 1,000µg/mL concentration.
PGDN is very similar to nitroglycerin, but is signifi-
cantly safer to handle, and can be stored for long
periods of time. Nonetheless, the material is an envi-
ronmental hazard; the National Institute for
Occupational Safety and Health (NIOSH) recom-
mended limit of exposure to airborne PGDN is
0.05ppm over a 40-hour work week. Otto Fuel II is
in at least 2 National Priorities List sites identified by
the US EPA. PGDN enters the environment primarily
in wastewater from naval facilities.
Many of our customers have asked us to include
PGDN among our stock offerings. We are now able
to comply with this request.
PGDN Standard (Propylene Glycol Dinitrate)
1,000µg/mL in methanol, 1mL/ampul
Each 5-pk. 10-pk.
31821 31821-510 —
w/data pack
31821-500 31821-520 31921
Bank Dye Standard
✔ Qualitative standard of red dye used
to thwart bank robberies.
The dye pack or “security pack” used in over 75%
of the banks in the United States contains a red dye,
1-N-methylaminoanthraquinone (MAAQ). The dye
pack, which is activated when it is taken outside the
bank, explodes and releases an aerosol of red
smoke, and burns at a temperature of about 400ºF.
When events go as planned, the thief discards the
bag, the money is recovered, and stained hands and
clothes expose the robber. The dye pack has con-
tributed to the recovery of $20 million in stolen
money and apprehension of 2500 criminals. Restek
offers this new qualitative standard to help investiga-
tors in municipal police stations and criminal labo-
ratories fight crime.
1-(methylamino)anthraquinone
Bank Dye Standard (MAAQ)
100µg/mL in methylene chloride, 1mL/ampul
Each 5-pk. 10-pk.
31823 31823-510 31923
By Katia May, Ph.D., R&D Chemist