Leading the way in material characterization“Micro Thermal Desorption Sampler”
This sampler is used when volatile components can be adsorbed and concentrated on a sorbent. Thesorbent tube is attached to the sampler which is subsequently fitted to Frontier’s Multi-Functional Pyrolyzer.
The sorbent tube is heated which releases the compounds adsorbed on the sorbent surface. The addition ofTD capability to the pyrolyzer dramatically extends the range of compounds and matrices amenable toanalysis by the Multi-Functinal Pyrolyzer.
Micro thermal desorption sampler

Features• Volatile organic compounds adsorbed on Tenax,activated carbon or other sorbents can beconcentrated and analyzed using Multi-Functional
Pyrolyzer.

Locking pinHe• Trace level vapors emanating from a solid sample
can be identified by concentrating the vapors on asuitable sorbent prior to analysis.

Quartz wool

Sorbent (Tenax, etc),
Magic Chemisorber,or solid sample

TD tube• Desorption temperature profile of the furnace canbe optimized for any analyte/sorbent combination.

Sampler inDOWN position

Analysis of volatile gases in the head space of an aqueous solution
Volatile Organic Compounds (VOCs) in theheadspace of an aqueous solution can easily
be determined using a sampling train similar tothat depicted in Figure 1. Helium purges thevapor phase VOCs through the sorbent. The
VOCS are adsorbed. In this example, anaqueous solution containing 20 ppm of amyl
alcohol and benzaldehyde is purged at 10mL/min for 10 minutes.

The thermal desorption tube is attached to the thermal
desorption sampler (TDS); care must be taken to ensurethat the flow through the tube is in the opposite directionas the sampling flow (i.e., the tube is back flushed whendesorbed). The TDS is placed on the EGA/PY-3030D
pyrolyzer. Amyl alcohol and benzaldehyde are desorbed
as the sorbent bed is heated. The reproducibility of thepeak area ratio (n=3) is 8.3 %RSD.

TD temp.: 80→200ºC (20 ºC/min, 5 min), separation column: UA-WAX (L=30 m,i.d.=0.25 mm, df= 0.25 µm), GC oven: 40 (2 min)→220ºC (20 ºC/min),column flow rate: 1 mL/min He, split ratio: 1/20He(10 mL/min)

Sorbent(Tenax)

Benzaldehyde

Amyl alcohol

n=1

Aqueous sample (5 mL)
Amyl alcohol
Benzaldehyde

n=2

20 ppm ea.
n=34

Figure 1. Trapping volatiles with sorbent

5678910 min

Figure 2. Repetitive analyses of volatiles trapped on Tenax

Operational procedure
1. Volatiles are trapped on the sorbent in thermal
desorption tube.
2. Attach the thermal desorption tube to the thermal
desorption sampler ensuring that the flow is reversed
from that used during the sampling period.
3. Attach the sampler to the pyrolyzer. Keep the sampler
in the “up” position while the furnace temperatureequilibrates at the initial temperature and the systemcomes to a READY state.

Auto-switching of the carrier gas flow path
Sampler in UP position
TD tubeSampler in DOWN position
NutCarrier gas
Sampler base

4. Push the sampler “down” so that the sorbent bed is in
the pyrolyzer furnace. The flow path of the carrier gas
is automatically switched so that the carrier gas flows
through the thermal desorption tube – see the rightfigure .

O-ring seals the topof the TD tube

Pyrolysis tube
Pyrolyzerfurnace

5. The adsorbed VOCS are released as the temperature
increases. This can be done instantaneously (T1=250ºC) or at a specific rate. In this case Frontier
Laboratories MicroJet Cryo-Trap is very useful fortrapping the volatile compounds at the head of thecolumn.

Specifications
Compatible pyrolyzer: EGA/PY-3030D

Contents in package

PY-3030S

Qty

P/N

Thermal desorption tube (Pyrex): i.d. 2 mm, o.d. 4 mm

• Micro Thermal Desorption Sampler

1 pc

PY1-1060

Sorbent tube length: 85 mm

Length of sorbent bed (max): 30 mm (vol 130 µL)• Standard accessories
Sampler standTD tubeTD tube packed with Tenax (60-80 mesh)O-ring S4

1 pc
5 pcs
3 pcs
5 pcs

UV1-3802
PY1-5220
PY1-5210
UV1-7701

1) Magic Chemisorber L100 (P/N PY1-MC02L, set of 5 pcs) is available as an option.
2) An order for Micro Thermal Desorption sampler (P/N: PY1-1060) contains all theitems listed above.

4-16-20 Saikon, Koriyama, Japan, 963-8862
TEL:81(24)935-5100 FAX:81(24)935-5102
www.frontier-lab.com/For product improvement, appearance and specifications are subject to change without notice.

V220208