AutoDesorb® System Accessories
Automated Short Path Thermal Desorption
System
A large number of thermal desorption accessories for sample
tube conditioning and sample collection are available for the
AutoDesorb System.
AutoDesorb 2" Cryo-Trap
2-inch cryo-trap designed for use with the SIS AutoDesorb System.
Provides cyro-cooling and heating for the cryo-focusing of volatiles
and semi-volatiles at the head of GC capillary columns designed.
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Sampling Tubes, Needles and Related Accessories
Desorption tubes, connecting tubes, needles, seals.
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24 Tube Conditioning Oven
The 24 tube conditioning oven is used for the flow
conditioning of both empty and packed thermal desorption tubes as
well as desorption tube needles. A high purity gas such as helium
or nitrogen is used to purge the packed desorption tubes and
needles while they are baked out at elevated temperatures. By
proper conditioning of the desorption tubes with adsorbent resins
and needles, no foreign contaminants will interfere with or
contribute to the composition of the samples which are to be
analyzed.
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6 tube |
24 tube
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Purge and Trap System
The SIS Purge and Trap System is used to purge volatile and
semi-volatiles from liquid and solid samples and trap the purged
analytes on a thermal desorption tube containing an adsorbent
resin. The system consists of two single ball rotameters with
adjustable needle valves and a stainless steel purging head.
Samples for extraction are placed into a 5 or 25 ml glass vial
which is attached to the purge head. The glass vial with sample
can be placed into a heated water bath or heater blanket to
analyze samples at elevated temperatures. High purity gas is used
to purge the volatiles from the sample onto the adsorbent trap.
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Sample Collection System
The Sample Collection System permits the purging of volatiles
and semi-volatiles from solid samples and trapping of the
analytes on a thermal desorption tube packed with an adsorbent
resin. Sample sizes up to 20 grams can be extracted with this
system. Samples for analysis are placed in either ¼" or
½" diameter x 14" long glass tubes and inserted into
the heater block. The samples are then heated, purged with high
purity gas and the analytes trapped a packed desorption tube.
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Desorption Tube Injection Head
The Desorption Tube Injection Head is used for loading
internal standards or liquid samples onto packed thermal
desorption tubes. The system works much like the injection port
on a GC. Samples are injected through a septum and a stream of
carrier gas purges the volatiles onto the thermal desorption tube
containing the adsorbent resin. All (100%) of the sample is
delivered to the adsorbent resin with no loss due to evaporation.
Additional purging of the desorption purges the solvent off the
adsorbent resin on the trap.
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Air Sampling Pump
The Air Sampling Pump is used for pumping air through packed
desorption tubes at constant air flows that can be set between 5
and 200 ml/min at variable back pressures up to 25" of
water. This system is used for air sampling to trap analytes
present in the air on the adsorbent resin traps for analysis via
thermal desorption techniques.
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Thermal Desorption System and Accessories for TD4 and
AutoDesorb System
Accessory Equipmerption References
nt
- Wheaton Purge and Trap System -
Similar to the above but two size vessels are available
for larger samples (100 ml and 1.0 liter). Used when
lower levels of analysis are required and for the
analysis of plant and flower material.
- Gillibrator Air Flow Calibration
System - A primary air flow calibration system to
calibrate systems for both positive and negative flows.
Accessories and Supplies
- GLT Desorption Tubes - Glass
Lined, inert wall for packing with adsorbent resins or
the direct introduction of solid samples.
- Tenax TA
Adsorbent Resins for use with thermal desorption
tubes - Buy 100 gram bottle of Tenax TA and receive Free
Breakthrough Volume Poster.
- Tenax GR
Adsorbent Resin for use with thermal desorption tubes
- Adsorbent Resins
for Thermal Desorption Applications
- Desorption Tube Packing
Accessories - Funnels, cleaning brushes, spatula,
thread cleaners, etc.
- Desorption Tube Seals - We
recommend a double seal consisting of a graphite seal
followed by a graphitized vespel seal.
- Desorption Tube Needles - We
recommend the side port needle transfer lines to
eliminate septum coring.
- Desorption System Fittings - A
wide selection of fittings for adapting thermal
desorption tubes to other equipment.
- SIS Purge and Trap System - Used
to Purge Volatiles from liquid and solid samples onto
adsorbent resin traps. This low cost system is ideal for
volatiles in beverages, water and other samples requiring
a sample between 1.0 ml and 25 ml to be used.
- Purge and Trap System Accessories - Glass Purging
Vials, purging needles and heating mantels for use with
the Purge and Trap System.
- Injection Port Liners - These
low dead volume liners provide for better heat transfer
to the thermal desorption needle and therefore assure
better delivery of the higher molecular weight compounds
to the GC.
- Tenax TA Poster - The
breakthrough volumes for 200 organic analytes at
temperatures from 0 degrees to 300 degrees are listed for
easy reference.
© 1996-2008 Scientific Instrument Services, Inc.
[Trademarks]
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