• 5 •
2003
Volume 2
800-356-1688
Rtx
®
-VMS, 30m, 0.25mm ID, 1.4µm (cat.# 19915)
Sample:
calibrationmixes: cat.# 30475 (ampul 1 + ampul 2), 30465, 30006, 30042;
non-oxygenated unleaded gasoline (custom) internal / surrogate
standards: cat.# 30240, 30074
Purge and Trap Conditions
O.I. 4560 Purge and Trap Concentrator
Sample:
10mL
Sample Temp.:
40°C
Trap:
#10 (Tenax
®
/silica gel/carbonmolecular sieve)
Trap Temp.:
purge: 20°C; desorb: 190°C; bake: 210°C
Purge:
11min., 38mL/min.
Desorb:
1.0min., 32mL/min.
Bake:
10min.
Chromatography
Inj. Temp.:
250°C, split 25:1
Carrier Gas:
helium, constant flow
FlowRate:
1.3mL/min.
Dead Time:
1.47min. @35°C
Oven Temp.:
35°C (hold 7min.) to 90°C@4°C/min. (no hold)
to 220°C@45°C/min. (hold 1min.)
Det.:
Agilent 5971AMS
ScanRange:
35–260 amu
Tune:
PFTBA/BFB
GC_EV00679
Acknowledgement: purge and trap courtesy of O.I. Analytical.
Figure 1
—Detect trace oxygenates, using anRtx
®
-VMS column.
5ppb oxygenates in 1ppmnon-
oxygenated gasoline.
area of enlargement
US EPAUnderground Storage
Tank (UST) Monitoring Program
Reference publications
for recommendedmethods
✔
Helpful checklists for the latest state and EPAUSTmethods:
– analytical referencematerials
– sample preparation supplies
– chromatography columns and accessories
✔
Conveniently organized bymethod—easy setup / easy reorder of consumables
In the late 1980s the US Environmental Protection
Agency (US EPA) established theOffice of
Underground Storage Tanks (OUST) to enforce fed-
eral laws on environmental contamination from
petroleum products. Underground Storage Tank
(UST) systems installed beforeDecember 22, 1988
had no protection against spills or overfills, and
were likely to corrode and leak. OUSTmandated
that by December 22, 1998, all UST systems were to
be prevented from contaminating nearby groundwa-
ter and soil. Existing systems were to be protected
from spills, overfills, and corrosion, or replaced
with new systems incorporating such protection.
Many of theunprotectedUST systems havebeenprop-
erly treated, but theneed formonitoringUST systems
persists. OUSThas been actively enforcing federal UST
regulations.
OUSThas recommended specificEPAmethods forUST
applications. Amajority of the states still use these
methods, butmany states havedevelopedmethods of
their own forUST analysis.
Tohelp laboratories complywith anduse the appropri-
ate analytical procedures, Restekhas been active in fol-
lowingEPA and state guidance. Basedonour knowl-
edge and experiencewith thesemethods, our chemists
havedeveloped lists of the appropriate chromatograph-
ic tools, and formulated analytical referenceproducts,
tohelp ensure successful analyses. Comprehensive list-
ings of quality chromatographic columns, analytical
referencematerials, and samplepreparationproducts
for latest statemethods are featured in an expanding
groupof Restekpublications. In these listings, youwill
find everything youneed toquickly set-upor reorder
consumables forUSTmethods.
Request comprehensive product listings
for latest state USTmethods
Reference Standards
PatternRecognition Standards
GRO– gasoline composites, including
compositeweathered gasoline standards
DRO - including a composite arctic range
diesel standard
RRO -motor oil composites, including
composite usedmotor oil
Weathered fuels and oils
Mineral oils
Military fuels
State-specific UST calibration formulations
Retention timemarker standards
Internal standards
Surrogate standards
Referencematerials conveniently organized by
method number
Custommixtures available - ask us for a quote
For copies of these publications, fill out the reply
card at the center of this
Advantage
. Select from
these current UST publications: AK - CA - FL - IA -
MA - TX -WI - Northwest (WA / OR) or USEPA
For custommixes, use the quote form in our
general catalog, or on our web site
), or fax 814-355-2895.
Remember: wewill be happy to provide a
quote on any custom referencemixture,
column, or other consumable you need!
