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2003 Volume 2
800-356-1688
Rtx ®-VMS, 30m, 0.25mm ID, 1.4µm (cat.# 19915)
Sample: calibration mixes: 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/carbon molecular sieve)
Trap Temp.: purge: 20°C; desorb: 190°C; bake: 210°C
Purge: 11 min., 38mL/min.
Desorb: 1.0 min., 32mL/min.
Bake: 10 min.
Chromatography
Inj. Temp.: 250°C, split 25:1
Carrier Gas: helium, constant flow
Flow Rate: 1.3mL/min.
Dead Time: 1.47 min. @35°C
Oven Temp.: 35°C (hold 7 min.) to 90°C @4°C/min. (no hold)
to 220°C @45°C/min. (hold 1 min.)
Det.: Agilent 5971A MS
Scan Range: 35–260 amu
Tune: PFTBA/BFB
GC_EV00679 Acknowledgement: purge and trap courtesy of O.I. Analytical.
Figure 1 — Detect trace oxygenates, using an Rtx®-VMS column.
5ppb oxygenates in 1ppm non-
oxygenated gasoline.
area of enlargement
US EPA Underground Storage
Tank (UST) Monitoring Program
Reference publications
for recommended methods
✔ Helpful checklists for the latest state and EPA UST methods:
– analytical reference materials
– sample preparation supplies
– chromatography columns and accessories
✔ Conveniently organized by method—easy setup / easy reorder of consumables
In the late 1980s the US Environmental Protection
Agency (US EPA) established the Office of
Underground Storage Tanks (OUST) to enforce fed-
eral laws on environmental contamination from
petroleum products. Underground Storage Tank
(UST) systems installed before December 22, 1988
had no protection against spills or overfills, and
were likely to corrode and leak. OUST mandated
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 the unprotected UST systems have been prop-
erly treated, but the need for monitoring UST systems
persists. OUST has been actively enforcing federal UST
regulations.
OUST has recommended specific EPA methods for UST
applications. A majority of the states still use these
methods, but many states have developed methods of
their own for UST analysis.
To help laboratories comply with and use the appropri-
ate analytical procedures, Restek has been active in fol-
lowing EPA and state guidance. Based on our knowl-
edge and experience with these methods, our chemists
have developed lists of the appropriate chromatograph-
ic tools, and formulated analytical reference products,
to help ensure successful analyses. Comprehensive list-
ings of quality chromatographic columns, analytical
reference materials, and sample preparation products
for latest state methods are featured in an expanding
group of Restek publications. In these listings, you will
find everything you need to quickly set-up or reorder
consumables for UST methods.
Request comprehensive product listings
for latest state UST methods
Reference Standards
Pattern Recognition Standards
GRO – gasoline composites, including
composite weathered gasoline standards
DRO - including a composite arctic range
diesel standard
RRO - motor oil composites, including
composite used motor oil
Weathered fuels and oils
Mineral oils
Military fuels
State-specific UST calibration formulations
Retention time marker standards
Internal standards
Surrogate standards
Reference materials conveniently organized by
method number
Custom mixtures 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 custom mixes, use the quote form in our
general catalog, or on our web site
, or fax 814-355-2895.
Remember: we will be happy to provide a
quote on any custom reference mixture,
column, or other consumable you need!