TDS 3 Brochure.pdf

Thermal Desorption System
Lowest Detection Limits
Dependable Operation
Reliable Results

Environmental
Packaging industry
Flavors and fragrance industry
Automobile industry
Food industry
Semiconductor industry
Tobacco industry
Forensic science
Pharmaceuticals industry
A complete list of available
publications from GERSTEL can
be viewed on our web site at
www.gerstel.com.

GERSTEL - The international specialists
for customer focused analytical solutions
Examination of polluted areas for pesticides, volatiles, semi-volatiles,
and air toxics. Material emissions.
Determination of solvent residues, additives, coatings, elastomers, and
adhesives in film. Analysis of plastics, paper and ink.
Combined with GC and Olfactory detection, determine the source of
desirable and undesirable flavors/odors in raw materials and final products.
Determination of compounds from vehicle interior out-gassing and
engine exhaust.
Determination of off-flavors, trace contaminants, and source and
composition of natural products.
Monitor micro-contamination of hard drives, computer sub-assemblies and
clean room environments.
Determination of pesticides, nitroso amines, flavorings, additives and trace
level constituents in tobacco products.
Identification of fire accelerants, paint chips, and controlled substances in
a wide variety of matrices.
Determination of residual solvents in tablets; packaging interaction, shelf life,
and decomposition products.
3

10 reasons to use the GERSTEL Thermal Desorption System
1
Cooled Injection System for GC adds versatility
2
No valves in flow path; GRAPHPACK fittings
3
Short, heated transfer line; only 15 cm long
4
No cold or hot spots in sample introduction system
5
Multi-level temperature programmed desorption chamber
6
Cooled pre-drying and purging of desorption chamber
7
Reduce sample matrix contribution and improve extraction efficiency
The TDS 3 transfer line is 15 cm long
and can be heated to 400°C. There
are no cold spots in the system.
These features provide optimum
transfer of components and
high-boiling materials to the
column (see chromatogram
»Air Sample on Glass Fibre
Filter« on this page).
8
9
10
Horizontal design allows direct thermal extraction of solids
Air Sample on Glass Fibre Filter
Direct Thermal Extraction, Extracted Ion Chromatogram
Lower detection limits
Small footprint
Abundance
6e+06
5e+06
4e+06
3e+06
2e+06
1
3
4
5 6 7,8
9
10
11
1 Phenanthrene
2 Anthracene
3 Fluoranthene
4 Pyrene
5 Benzo[a]anthracene
6 Chrysene
7 Benzo[b]fluoranthene
8 Benzo[k]fluoranthene
9 Benzo[e]pyrene
10Indeno[1,2,3-cd]pyrene
11 Benzo[ghi]perylene
12 Coronene
1e+06
2
12
Time--> 20.00 30.00

Cooled inlet functions as focussing trap; provides split/splitless sample
introduction, use of selective adsorbents, and high flow-inert sample transfer.
No downtime due to valve failure, contamination or leaks.
Optimum analyte transfer with minimal exposure to high transfer
line temperatures.
Transfer of high boiling compounds with minimal mass discrimination
and sample degradation.
Transfer only the compounds of interest to the cooled inlet.
Reduce analysis time and system contamination.
Pre-drying and purging can be used to eliminate water, solvents
or oxygen, while still retaining analytes on adsorbent or in sample.
Dynamic headspace mode transfers analytes on to the cooled inlet
at lower desorption temperature and high flow rate.
More flexibility in sample introduction, faster sample
preparation .
High flow desorption with splitless transfer provides detection limits
up to 100 times lower than other systems.
Mounts on top of GC; requires minimal bench space.
Ground Coffee
Vapor Sample, Thermal Desorption
Abundance
1.6e+06
1.2e+06
1
2
3
4
5
1 2-Methylfuran
2 2-Methylbutanal
3 Dihydro-2-methyl-3(2H)-furanone
4 2-Furancarboxaldehyde
5 2-Furanmethanol
6 2,5-Dimethylpyrazine
7 5-Methyl-2-furancarboxaldehyde
800000
6
7
400000
Time--> 5.00 10.00 15.00 20.00
5

The GERSTEL TDS 3 Thermal Desorption System
provides you with maximum flexibility
• Conventional Thermal Desorption
Volatile and semi-volatile compounds can be
determined by sampling a gas using a wide range
of adsorbents. Desorption of the sample can be
performed in four different modes using a flexible,
software controlled pneumatic system.
• Direct Thermal Extraction
Dynamic headspace of volatile and semi-volatile
compounds in solids or gels can be performed
directly without sample preparation.
• Simultaneous Liquid Injection
The TDS allows liquid injection to be performed
simultaneously in the back inlet of most GCs or
it can be removed and the GC can be configured
for liquid injection in a matter of minutes.

• GERSTEL TDS 3
Manual thermal desorption system for
conventional thermal desorption or
direct thermal extraction/dynamic
headspace. The system has the option
of using LN 2 or LCO 2 cooling.
• GERSTEL TDS A2
The addition of a TDS A2 to a TDS 3 or TDS 3 PLUS
provides complete automated processing of up to
20 samples using multiple analysis methods.
• GERSTEL TDS 3 PLUS
The GERSTEL TDS 3 PLUS has an integrated Peltier
cooling system that eliminates the need for cryogenic
cooling.
P e l t i e r C o o l i n g
7

Technical Summary
GERSTEL Thermal Desorption Systems
Thermal Desorption System
TDS 3
Transfer capillary
Desorption tubes
Glass liner
Conventional thermal desorption systems
usually consist of a desorption unit, a cooled
trap and a GC inlet. The TDS 3 is a highperformance
thermal desorption system that
uses the GERSTEL cooled injection system to
function as both a cryogenic trap and a GC
inlet. Analytes are focussed in the inlet liner,
not the column, before being transferred onto
the analytical column as a narrow band. The
use of the inlet liner as a trap allows much
greater flexibility when trapping analytes and
protects the column from water and
contamination.
Desorption tubes can be initially cooled and
flushed with carrier gas to remove oxygen,
water or unwanted solvents. Two temperature
ramps are available to heat the tube up to
400°C. Analyte loss is avoided during transfer
from the TDS 3 to the CIS by using a transfer
line that is only 15 cm in length that can be
heated from ambient room temperature to
400°C.
The combination of the CIS and the TDS permit
a high desorption flow by trapping analytes in
the glass inlet liner of the CIS while excess gas
flows out the split vent. The system is capable
CIS 4
of a wide range of sampling modes
(from splitless to very high split ratios)
providing a dynamic range that allows
trace constituents to be determined as
easily as major sample components.
The manually operated TDS can be
upgraded to a fully automated system
capable of analyzing up to twenty
samples by adding the TDS A2.
Control and programming
The TDS 3 and TDS A2 are added to a
CIS system by simply adding the
appropriate circuit boards to the
C506 controller. System control and
programming can be carried out using
the controller's handheld keypad or by
using the GERSTEL MAESTRO software.

High performance auxiliary modules
for even greater versatility
GERSTEL Tube Conditioner TC
Conditions up to ten GERSTEL thermal
desorption tubes simultaneously. Tubes
are held at a controlled temperature and
are purged with inert gas.
Applications
Packed and empty TDS tubes.
Why use the GERSTEL TC?
Off-line conditioning system
• Conditioned TDS tubes available
at all times
Tubes can be re-used
• Extends useful life of all of tubes
• Reduces cost per analysis
• Improves detection limits
GERSTEL ThermoExtractor TE
This sample preparation system accommodates
larger size samples, separates moisture from
the matrix, and provides an even higher level
of analyte enrichment.
Sample applications
Packaging industry
• Analysis of paper for off-flavors
Flavors and fragrance industry
• Determination of volatile flavors in natural
sources such as flower petals.
Food industry
• Determination of volatile components in
beverages and soup packages.
Why use the GERSTEL TE?
Greater sample capacity
• Lower detection limits
Separation of matrix and moisture
in a single system
• Eliminates costly extraction steps
GERSTEL Pyrolysis Module PM
This manually operated pyrolysis module is a TDS 3
accessory. It permits pyrolysis of samples at temperatures
up to 1000°C without any modification to the TDS 3.
Applications
Production line monitoring
• Qualitative analysis of polymers
Why use the GERSTEL PM?
Adds pyrolysis to the TDS 3 range of applications
• Increases the temperature range of the TDS
expanding its analytical capability
Thermal extraction and pyrolysis in a single system
• Reduces cost – no extra pyrolysis
system required
Fresh squeezed orange juice
Sample preparation using GERSTEL ThermoExtractor TE followed by thermodesorption
Abundance
3000000
2000000
1000000
1
2
3
4
5 6
7
Time--> 10.00 20.00
1 a-Pinene
2 Ethyl Butyrate
3 Ethyl-2-Methyl
Butyrate
4 Hexanal
5 Sabinene
6 d-3-Carene
7Myrcene
8 a-Terpinene
9 Limonene
10 b-Phellandrene
11 Ethyl Caproate
9
8
14
10
11
12
13
12 g-Terpinene
13 a-Terpinolene
14 Acetoine
15 Acetic Acid
16 Furfural
17a-Copaene
18 Formic Acid
19 Ethyl-3-Hydroxy
Butyrate
20 2,3-Butanediol
21 Linalool
22 Hexadecane
26
19 21
15 20
17
22 23 16 18
24 25
23 1,2-Propanediol
24 Terpinene-4-ol
25 Butyric Acid
26 Ethyl-3-Hydroxy
Hexanoate
27b-Selinene
28 a-Terpineol
913
27 28 29
30
31
32 34
33 35
30.00
29 Valencene
30 a-Selinene
31 Carvone
32 d-Cardinene
33 7-epi-a-Selinene
34 Nerol
35 Geraniol

Online analysis with the TDS
• The GERSTEL Online TDS G
is designed for the continuous
analysis of compounds in air,
gas streams or large volume
headspace. It features automatic
sample volume contol and
reversed sample desorption flow.
Sample taken from rape plants
Extracted ion chromtogram. The figure shows the mass traces
m/z = 50 (ISTD) and m/z = 93 (monoterpene).
Abundance
22 000
21 000
20 000
19 000
18 000
17 000
16 000
15 000
14 000
13 000
12 000
11 000
10 000
9 000
8 000
7 000
6 000
5 000
4 000
3 000
2 000
1 000
alpha-Thujene
alpha-Pinene
n-Decan, d22 (ISTD)
Sabinene
Myrcene
beta-Pinene
alpha-Phellandrene
alpha-Terpinene
Limonene
beta-Phellandrene
Eucalyptole
0
Time 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00
gamma-Terpinene
Terpinolene
Outdoor Air Sample
spiked with a 22 Compound Standard
Transfer of Fraction #1 (pre-Benzene) onto the Polar Column
Abundance
6000
4000
10-14
3 68 9 15 16 18
4
2
5
7
1
1 Ethane 10 1,3-Butadiene
2 Acetylene 11 trans-2-Butene
3 Propane 12 cis-2-Butene
4 Propylene 13 i-Butylene
5 i-Butane 14 2-Methylbutane
6 n-Butane 15 n-Pentane
7 Chlormethane 16 Chlorethane
8 Vinylchloride 17 1,2-Dichlorethane
9 1-Butene 18 n-Hexane
2000
17
Time--> 4.00 8.00 12.00
16.00
Transfer of Fraction #2 (past Benzene) onto the Polar Column
Abundance
8000
19
20
21 22
19 Benzole
20 Xylene
21 Ethylbenzole
22 o-Xylene
6000
4000
2000
Time--> 4.00 8.00 12.00
16.00

Reliable results with GERSTEL approved consumables
All GERSTEL consumables are
subjected to rigoros testing before
being approved for use with GERSTEL
systems, thus ensuring optimum
performance.
Desorption tubes
Desorption tubes are available for a wide
range of applications. Tubes can be
supplied empty, or packed with the
adsorbent of your choice. All tubes have
a unique identification number, and are
available unconditioned or conditioned
in storage containers.
Standard adsorbents:
TenaxTA 60/80
Tenax GR
Chromosorb106
Carbosieve
Carbotrap300
Sample magazine for the TDS A2
Stores up to 20 TDS tubes. The automatic
sealing system on this interchangeable
magazine ensures that tubes are stored safely
with an airtight seal. The magazine can be
inserted directly into the TDS A. The tubes are
then introduced automatically into the TDS 2
for analysis and returned to the magazine when
analysis is complete.
Storage Containers
Containers with airtight seal. These have been
carefully designed to hold individual TDS tubes
during storage or transport without the risk of
sample loss or contamination.
Custom adsorbents
available on request
More information
Request or download our catalog
»Analytical Supplies« for more information
on available accessories and consumables.
www.gerstel.com
11

GERSTEL GmbH & Co. KG
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+49 (0) 208 - 7 65 03-0
+49 (0) 208 - 7 65 03 33
gerstel@gerstel.com
www.gerstel.com
GERSTEL Inc.
Caton Research Center
1510 Caton Center Drive, Suite H
Baltimore, MD 21227, USA
+1 (410) 247 5885
+1 (410) 247 5887
info@gerstelus.com
www.gerstelus.com
GERSTEL GmbH & Co. KG
Technisches Büro Berlin
Marburger Straße 3
10789 Berlin
(0 30) 21 90 98 28
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GERSTEL GmbH & Co. KG
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Parkallee 117
28209 Bremen
(04 21) 3 47 56 24
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Technisches Büro Karlsruhe
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76229 Karlsruhe
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(07 21) 9 63 92 22
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GERSTEL AG
Enterprise
Surentalstrasse 10
CH-6210 Sursee
+41 (41) 9 21 97 23
+41 (41) 9 21 97 25
gerstel@ch.gerstel.com
www.gerstel.de
GERSTEL K. K.
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info@ch.gerstel.co.jp
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GERSTEL GmbH & Co. KG
Technisches Büro München
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81929 München
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tb_bremen@gerstel.de
Information, descriptions and specifications in this
Publication are subject to change without notice.
GERSTEL, GRAPHPACK and TWISTER are
registered trademarks of GERSTEL GmbH & Co. KG.
Printed in the Rep. of Germany
© Copyright by GERSTEL GmbH & Co. KG
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