D25
Scientific Instrument Services, Inc.
TM
FAX: 908-806-6631
www.sisweb.com/catalog/08/D25
Micro Cryo-Trap
TM
Features
-
Only 1.0" long - uses minimum amount
of cooling gas
-
Reduction of CO
2
or LN
2
use by 97%
as compared to cooling the entire oven.
-
Improve chromatographic resolution of
early eluting peaks
-
Dual programmable cryo-cooling and
heating cycles
-
Trap compounds in the GC oven at the
head of the GC column.
-
Remote input connector for switching
between cryo-cooling and heating
cycle switching via GC, Desorption
system or manually.
-
Rapid heating up to 400°C at > 400°C
per minute.
-
Remote start output signal for starting
GC, MS or recorder.
-
Easy Installation
-
Clamp Mounts onto GC Injection Port
Applications
-
Thermal Desorption Sample Trapping
-
Purge and Trap Systems
-
GC Headspace Sample Analysis
-
Multi-dimensional GC Applications
T
he Micro Cryo-Trap consists of a small heating/cooling
chamber which is 3/4" in diameter and 1" long and mounts
on the bottom of the injection port just inside the GC oven.
In the center of the chamber is a small stainless steel capillary
through which the capillary column freely passes. Capillary columns
up to megabore (0.53mm I.D.) diameters can be used. Around the
stainless steel capillary tube a heating coil is wound to provide for the
rapid heating of the capillary tube. A thermocouple provides accurate
measurement of both the cooling and heating temperatures. Either
Liquid CO
2
or Liquid Nitrogen for cooling is introduced into the Micro
Cryo-TrapTM (Cooling Gas In), and is exhausted through the outlet.
The exhaust can either be vented into the GC Oven or a tube can be
attached to vent the cooling gas external to the GC.
The control of the Micro Cryo-Trap is provided via an indepen-
dent Cryo-Trap Controller provided with the System. Both the Cryo-
Cooling and heating temperatures are set via this digital temperature
controller. The system can be used either manually to switch
between cooling and heating or can be operated automatically via an
input signal from a controlling device.
For the cooling operation the cooling gas is pulsed into the cham-
ber. Liquid CO
2
(Model 971) will cool down to -70° C. Liquid Nitrogen
(Model 981) will cool down to -180°C. The cooling temperature can
be set to any temperature between room temperature and the lower
limits of the cooling gas. The temperature controller will pulse the
cooling gas into the chamber to accurately control the temperature to
the value you set. The thermocouple provides the feedback to both
regulate the temperature as well as display the Micro Cryo-TrapTM
temperature on the display of the temperature controller. The elec-
tronics of the Model 971 and Model 981 are different due to the dif-
ferent cooling properties of the liquid CO
2
and Liquid Nitrogen.
Therefore parts are not interchangeable between the two models and
the particular model can only be used with the cooling gas for which
it was designed.
Each Micro Cryo-Trap System consists of the Micro Cryo-TrapTM
which goes inside the GC oven, the cryogenic gas valve, the Dual
Temperature Controller and cooling gas tubing.
Micro Cryo-Trap
New Programmable Micro Cryo-TrapTM for the Cryo-focusing of
Volatiles and Semi-Volatiles at the Head of GC Columns.
Micro Cryo-TrapTM
only
1.0 inch long
Free Application Notes Available - Call SIS at (908) 788-5550
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