• 11 •
2003
Volume 3
800-356-1688
✔
Efficiently controls foam; effective
over awidepH range.
✔
Add an antifoaming agent, rather than
diluting the sample, to ensure lower
detection limits.
✔
Effective at less than0.1%of sample
volume.
Methods formonitoring volatile organic compounds
(VOC) inwaste streams, such as US EPAmethods 624
and8260, involve purge& trap techniques. Often,
foam is generated as the purge gas passes through the
sample. Foam can enter the analytical trap andpoten-
tialy be carried into theGC column. Silica/silicone
antifoam agents easily control polyglymes and alkaline
detergent-based foams, themost 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
todilute 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.
✔
Availablewith quick-connect fitting that is compatiblewith sampling and
analysis instruments.
✔
Also availablewith 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.
MiniatureAir SamplingCanisterswithQuick-Connect Stem Fittings
Description
Volume qty.
cat.#
Electro-PolishedMiniature Canister withQuick-Connect Stem Fitting
400cc
ea.
24188
Sulfinert
™
-CoatedMiniature Canister withQuick-Connect Stem Fitting
400cc
ea.
24189
Sulfinert
™
-CoatedMiniatureCanisterwithSulfinert
™
-TreatedQuick-Connect StemFitting 400cc
ea.
24190
MiniatureAir SamplingCanisterswithMetal-SeatedDiaphragmValve
Description
Volume qty.
cat.#
Electro-PolishedMiniature Canister withMetal-SeatedDiaphragm Valve
400cc
ea.
24191
Sulfinert
™
-CoatedMiniature Canister withMetal-SeatedDiaphragm Valve
400cc
ea.
24192
Sulfinert
™
-CoatedMiniature Canister with Sulfinert
™
-TreatedDiaphragm Valve
400cc
ea.
24193
Fittings forMiniatureAir SamplingCanisters
Description
qty.
cat.#
Quick-Connect Stem Fitting
ea.
24185
Sulfinert
™
-TreatedQuick-Connect Stem Fitting
ea.
24186
Quick-Connect Body Fitting
ea.
24187
Metal-Seated
DiaphramValve
Miniature
Canister
Quick-Connect
Stem Fitting
Quick-Connect
Body Fitting
NewReferenceMaterials
Purge and Trap Analysis – Environmental – Forensics
AntifoamAgent for Purge& Trap Samples
Neat, 1mL/ampul
Each
5-pk.
31822
31822-510
AntifoamAgent for Purge& Trap Samples
Explosives Standard
✔
Propyleneglycol dinitrate (PGDN),
themain component of Otto Fuel
II
for torpedoes andotherweapons.
✔
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, thematerial is an envi-
ronmental hazard; the National Institute for
Occupational Safety andHealth (NIOSH) recom-
mended limit of exposure to airborne PGDN is
0.05ppm over a 40-hour workweek. Otto Fuel II is
in at least 2National Priorities List sites identified by
the US EPA. PGDN enters the environment primarily
inwastewater 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 (PropyleneGlycol Dinitrate)
1,000µg/mL inmethanol, 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 activatedwhen 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, themoney is recovered, and stained hands and
clothes expose the robber. The dye pack has con-
tributed to the recovery of $20million in stolen
money and apprehension of 2500 criminals. Restek
offers this new qualitative standard to help investiga-
tors inmunicipal police stations and criminal labo-
ratories fight crime.
1-(methylamino)anthraquinone
BankDye Standard (MAAQ)
100µg/mL inmethylene chloride, 1mL/ampul
Each
5-pk.
10-pk.
31823
31823-510
31923
By KatiaMay, Ph.D., R&DChemist
