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[ Thermal Desorption | Index] Zoom: [PDF icon Printable PDF]
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Pages in this section: C6 C7 C8 C9 C10 C11
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C7
AutoDesorb
™
Scientific Instrument Services, Inc.
™
FAX: 908-806-6631
www.sisweb.com/catalog/08/C7
The AutoDesorb System
T
he AutoDesorb System uses the SIS patented “Short
Path™ Thermal Desorption” technology. This “short
path” provides for the highest sensitivity of analysis. The
Short Path Thermal Desorption technique enables the analysis of a
wide diversity of samples via several thermal desorption sampling
techniques. Both the Purge & Trap technique and Direct Thermal
Extraction technique can be used for the analysis of volatile as well
as semi-volatile organics.
The Short Path Thermal Desorption Technology provides several
unique advantages over other desorption systems:
First:
It enables the sample, which is trapped on an adsorbent
media contained in a glass lined stainless steel tube (GLT desorp-
tion tube), to be subjected to rapid (ballistic) heating. The
AutoDesorb System can desorb samples at temperatures up to
450° C and at ramp rates up to 100° C. Desorption times and other
timers can be set from 1 second to 99 minutes. Multi-step desorp-
tion heater ramping with hold times can also be programmed
Second:
The desorbed component can be easily and efficiently
transferred into the injection port of the gas chromatograph from a
glass lined stainless steel sample tube and its associated injection
needle. This provides for a short transfer path for the sample in an
inert environment to minimize the degradation of labile sample
components which often decompose upon contact with the hot cat-
alytic metal wall surfaces of the transfer path of other systems.
Third:
Each sample has its own individual adsorbent trap tube
and needle to eliminate the possibility of cross-contamination from
sample to sample, thus preventing any "memory effect" due to
overloading of the sample in the GLT desorption tube or due to
residues from previous samples.
Fourth:
The new automated system permits the unattended
analysis of multiple samples, thereby increasing the productivity of
the laboratory
Fifth:
The “short path” thermal desorption technology provides
the most versatile techniques for the analysis of a wide range of
volatile and semi-volatile organics from gas, liquid and solid matrix
samples.
Complete AutoDesorb System and it components mounted on an Agilent GC/MS
AutoDesorb System mounted on the Agilent 6890 GC and 5973 MSD
AutoDesorb Tower
12 Tube
Carousel
PC Controls the
AutoDesorb™
AutoDesorb™
Electronics
Console
Capillary Column
Cryo-
Trap
™
GC/MS
Interface
SIS AutoDesorb
™
System
Automated Short Path Thermal Desorption
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