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Environmental
Thermal Desorption Unit (TDU) Tubes
• Variety of sorbents to collect a wide range of VOCs.
• Use glass tubes for maximum inertness in active sampling.
• Choose stainless steel tubes for either active or passive sampling. No sampling pump necessary for
passive sampling with diffusion caps!
• Individually etched with unique serial number for convenient sample identification.
• Available unconditioned or preconditioned and ready to sample. Tubes are Reusable after thermal
desorption.
Thermal Desorption Unit Tubes, Unconditioned and Conditioned & Capped
High-quality thermal desorption tubes by Markes International are now available from Restek. These sor-
bent tubes are suitable for ppt to ppm concentrations of volatile organic compounds (VOCs) in ambient,
indoor, and industrial hygiene environments. Available in both stainless steel and glass (for thermally
labile VOCs), they fit Markes ULTRA-UNITY, PerkinElmer, and Shimadzu thermal desorbers. Packed
tubes come with a report detailing the total mass of sorbent in the tube; conditioned tubes also include a
blank chromatogram.
Unconditioned
Conditioned & Capped
Stainless Steel
Glass
Stainless Steel
Glass
Description
qty.
cat.#
price
cat.#
price
cat.#
price
cat.#
price
TDU Tubes, Tenax TA
10-pk.
24056
24062
24080
24086
TDU Tubes, Graphitized Carbon
10-pk.
24057
24063
24081
24087
TDU Tubes, Tenax GR/Carbopack™ B
10-pk.
24058
24064
24082
24088
TDU Tubes, Carbopack™ B/Carbosieve™ SIII 10-pk.
24059
24065
24083
24089
TDU Tubes, Tenax TA/Graphitized
Carbon/Carboxen™ 1000
10-pk.
24060
24066
24084
24090
TDU Tubes, Carbopack™ C/Carbopack™
B/Carbosieve™ SIII
10-pk.
24061
24067
24085
24091
Thermal Desorption Unit Tubes, Empty
Stainless Steel
Glass
Description
qty.
cat.#
price
cat.#
price
TDU Tubes, Empty
10-pk.
24054
24055
Thermal Desorption Unit Tubes, Calibration
Stainless Steel
Glass
Description
qty.
cat.#
price
cat.#
price
TDU Tubes, Calibration, Tenax TA 1cm Bed
10-pk.
24075
24076
Description
qty.
cat.
price
Calibration Solution Loading Rig
ea.
24077
Calibration Solution Loading Rig 9.5mm Replacement Septa
10-pk.
24078
Certified Reference Standard, 100ng BTX on Tenax TA
10-pk.
24079
Thermal Desorption Unit Tubes, Accessories
Description
Benefits/Uses
qty.
cat.
price
1
/
4
" Brass Cap and PTFE Ferrules
Use for long-term storage of blank/sampled tubes.
20-pk.
24068
1
/
4
" PTFE Ferrules
Long-term storage caps.
20-pk.
24069
CapLok Tool
Use for tightening long-term storage caps.
ea.
24070
Pen Clip
10-pk.
24071
TubeMate Tool
Assists with tube packing.
ea.
24072
1
/
4
" Stainless Steel Union and PTFE Ferrules
Use for connecting tubes in series.
10-pk.
24073
Diffusion Caps
Required for diffusive sampling with stainless steel tubes.
10-pk.
24074
CapLok Tool
Diffusion Caps
Thermal Desorption Tube Sorbent
Applications
Tenax TA
Vapour phase organics from C6/7 to C26
Graphitized Carbon
Vapour phase organics from C5/6 to C14
Tenax GR/Carbopack™ B
Vapour phase organics from
n
-C5/6 to
n
-C20 (EPA Methods TO-14/TO-15/TO-17)
Carbopack™ B/Carbosieve™ SIII
Vapour phase organics from
n
-C2/3 to
n
-C12/14 (EPA Methods TO-14/TO-15/TO-17)
Tenax TA/Graphitized Carbon/Carboxen™ 1000
Vapour phase organics from C2/3 to C20
Carbopack™ C/Carbopack™ B/Carbosieve™ SIII
Vapour phase organics from
n
-C2/3 to
n
-C16/20 (EPA Methods TO-14/TO-15/TO-17)
method
applications
Method
Application
US EPA
TO-17
ASTM
D-6196
NIOSH
2549
DIN EN ISO
16017
Specifications
Dimensions:
1
/
4
" OD x 3-
1
/
2
" long
Low sampling rates:
0.01-0.20 L/min.
(<10L total volume)
Long-term storage caps are
supplied with conditioned tubes
Stainless Steel,
Conditioned and Capped
Glass, Unconditioned
Stainless Steel,
Unconditioned