SRI EPA METHOD
5030/5035 PURGE AND TRAP
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Built into the GC for
lower dead volume and better peak shapes |
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No need for transfer
lines |
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Two independently
heated adsorbent traps |
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Complies with EPA
Methods |
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Peaksimple control |
The SRI Purge & Trap concentrates the volatile
organic compounds (VOCs) in a gas, water, or
soil sample onto two adsorbent traps, from which
they are automatically desorbed onto the GC
column. The Method 5030/5035 Compliant Purge &
Trap is equipped with interchangeable purge
heads. The 5035 purge head is a thermostatted
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sleeve which accepts standard 40mL
VOA vials. The entire sleeve is mechanically
agitated while purging to comply with the
requirements of EPA Method 5035. The 5030 purge
head uses low-cost, disposable 16mm test tubes
which are purged at ambient temperature. For
higher level soil samples or soil/methanol
extractions, the test tube is more convenient
and less expensive than VOA vials.
Operation of the Purge & Trap is completely
automated by the PeakSimple data system that is
built into the GC. Run parameters such as purge
time, desorb heat, bake-out, vial temperature,
and mechanical agitation are adjusted in a
PeakSimple Event table.
The SRI Purge & Trap is unique because it is
equipped with two traps rather than one.
Each trap can be heated independently at the
adsorption temperature (typically 35-70oC),
the desorption temperature (200oC),
and the bake-out temperature (250oC).
For most VOC applications, the first trap is
Tenax-GR, and the second trap is Carbon
Molecular Sieve. By setting the adsorption
temperature of the Carbon MoleSieve to 50-60oC
and the Tenax-GR to 35oC, water
retention is dramatically reduced. By staggering
desorption times, early eluting peaks from the
hot Carbon MoleSieve trap are refocused on the
temporarily cold Tenax-GR trap, resulting in
much sharper peaks than otherwise possible
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#SRI-8690-0052,
Method 5030/5035 Compliant Purge and Trap
(with interchangeable purge heads) |
$8,239.00 |
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#SRI-8690-0051,
Method 5030 Compliant Purge and Trap |
$6,689.00 |
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