Applications - Environmental, Plants & Commercial
C46
Scientific Instrument Services, Inc.
™
Phone: 908-788-5550
www.sisweb.com/catalog/08/C46
Air Sampling from Plants and Commercial Products
Technique: Dynamic Headspace Purging
Sample: The volatiles from a Chrysanthemum flower in a Wheaton Purge and Trap
Apparatus were trapped on Tenax traps.
Thermal Desorption: Block temperature: 200°C, Purge flow1.5 ml/min He,
Desorption time: 5.0 min. Initial column trap temperature: -40°C
Column: DB-5, 25 meter x 0.25 mm I.D., 0.25 u film, -40° to 280°C at 10°/min.
Technique: Air Sampling of Volatiles from Adsorbent Traps
Sample: A 70 liter sample of air from leaves of a Bartlett Pear Tree were pumped through a
Tenax GLT desorption trap using a portable pump. Data Courtesy CAFT, Rutgers Univ.
Thermal Desorption: Block temperature: 200°C, Purge flow10.0 ml/min He,
Desorption time: 10.0 min. Initial column trap temperature: -40°C
Column: DB-1, 60 meter x 0.32 mm I.D., 0.25 u film, -20° to 280°C at 10°/min.
M
any plants and animals as well as commercial products may produce odors or volatile emissions which can be trapped on
adsorbent traps and then analyzed via the Short Path Thermal Desorption System. The air from the samples or materials is
passed through the GLT desorption tube which has been packed with Tenax or some other adsorbent resin.
1 . 0
0 . 5
0 . 0
10 : 00
20 : 00
30 : 00
40 : 00
50 : 00
60 : 00
70 : 00
80 : 00
90 : 00
100 : 00
1. 2-Trans Hexenol
2. 2- Trans Hexenyl Acetate
2
1
500000
1000000
1500000
2000000
2500000
3000000
3500000
4000000
4500000
5000000
5500000
6000000
0
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
22.00
24.00
Time
4
1. 2 propanone
2. methyl benzene
3. pinene
4. camphor
1
2
3
Chrysanthemum
Bartlett Pear Tree Leaves
Air Sampling - Environmental Monitoring
T
he Volatiles present in the environmental air can be readily analyzed using the Short Path Thermal Desorption System. The air
to be analyzed is pumped through a GLT desorption tube which has been previously packed with an adsorbent resin such as
Tenax.Any of a wide variety of small air pumps (vacuum) that are commercially available can be used to pump the air through
the desorption tube.
48.00
46.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
1. Methylbenzene
2. Dimethylbenzene
3. Trimethylbenzene
4. Diethylbenzene
5. Methylnaphthalene
5 . 5e+07
5e+07
4e+07
4 . 5e+07
3 . 5e+07
3e+07
2 . 5e+07
2e+07
1 . 5e+07
1e+07
5000000
0
Time
1
2
3
5
4
Technique: Air Sampling of Volatiles from Adsorbent Traps
Sample: A 70 liter sample of air from a residential garage (December) was pumped through
a Tenax GLT desorption trap.
Thermal Desorption: Block temperature: 250°C, Purge flow:2.0 ml/min He,
Desorption time: 10.0 min. Initial column trap temperature: -40°C
Column: DB-5, 25 meter x 0.25 mm I.D., 0.25 u film, -40° to 280°C at 10°/min.
2 0 : 0 0
3 0 : 0 0
4 0 : 0 0
5 0 : 0 0
6 0 : 0 0
7 0 : 0 0
8 0 : 0 0
1 0 : 0 0
1 . 0
0 . 5
0 . 0
Technique: Air Sampling of Volatiles from Adsorbent Traps
Sample: A 100 liter sample of air from a New York City Energy Efficient Skyscraper
was pumped through a Tenax GLT desorption trap. Data Courtesy CAFT Rutgers Univ.
Thermal Desorption: Block temperature: 250°C, Purge flow:2.0 ml/min He,
Desorption time: 10.0 min. Initial column trap temperature: -40°C
Column: DB-5, 25 meter x 0.25 mm I.D., 0.25 u film, -40° to 40° at 10°/min, 40° to 280° at 4°/min
2000000
4000000
6000000
8000000
1e+07
1.2e+07
1.4e+07
1.6e+07
1.8e+07
2e+07
2.2e+07
2.4e+07
0
26
24
22
20
18
1
6
14
12
10
8
6
4
2
Technique: Air Sampling of Volatiles from Adsorbent Traps
Sample: A 1.0 liter sample of air from a container spiked with gasoline was pumped
through a Tenax GLT desorption trap. Data Courtesy NJSP.
Thermal Desorption: Block temperature: 250°C, Purge flow: 6.0 ml/min He,
Desorption time: 10.0 min. Initial column trap temperature: -40°C
Column: SPB-1, 30 meter x 0.75 mm I.D.,1.0 u film,-40° to 250°C at 12°/min.
Garage Air
Energy Efficient NYC Skyscraper
Forensic Arson
Analysis - Gasoline
Air Sampling Pump
GLT Desorption Tube
packed with Adsorbent Resin
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