C43
Applications - Direct Thermal Extraction
Scientific Instrument Services, Inc.
™
FAX: 908-806-6631www.sisweb.com/catalog/08/C43
1
2
3
22.00
24.00
26.00
28.00
30.00
32.00
34.00
36.00
38.00
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
Time
0
5
1. Acetic Acid
2. Phenol
3. 1,2,3- Propane
triol monoacetate
4. triacetin
5. styrene
4
Pharmaceuticals
The residual solvents, manufacturing precursors, contami-
nants and decomposition products in pharmaceutical samples
can be easily detected and identified using the Direct Thermal
Extraction Technique.
Sample: 2.0 mg. crushed aspirin was placed inside the GLT desorption tube
Thermal Desorption: Block temperature: 100°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.
Aspirin
1 0 0 0 0 0 0
2 0 0 0 0 0 0
3 0 0 0 0 0 0
4 0 0 0 0 0 0
5 0 0 0 0 0 0
6 0 0 0 0 0 0
7 0 0 0 0 0 0
8 0 0 0 0 0 0
9 0 0 0 0 0 0
1 e + 0 7
1 . 1 e + 0 7
1 . 2 e + 0 7
2 2 . 0 0
2 4 . 0 0
2 4 . 0 0
2 8 . 0 0
3 0 . 0 0
3 2 . 0 0
3 4 . 0 0
3 6 . 0 0
3 8 . 0 0
4 0 . 0 0
4 2 . 0 0
4 4 . 0 0
Ti m e
1. BHT
1
Commercial Products
A wide range of solid matrix commercial products including
packaging materials, building products, manufactured materials,
and natural products can be analyzed using the Direct Thermal
Extraction Technique.
34. 00
32. 00
30. 00
28. 00
26. 00
24. 00
22. 00
20. 00
100000
200000
300000
400000
500000
600000
700000
800000
900000
Butyl Carbitol
BHT
CH3 COO (CH7)3 CH3
OH
Time
CH3 COOH
Sample: 10.0 mg. of a 3 year old Tablet was placed inside the GLT desorption tube
Thermal Desorption: Block temperature: 125°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
Sample: 2.0 mg. of rubber from a new automobile tire was placed inside the GLT desorption tube
Thermal Desorption: Block temperature: 125°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.
Automobile Tire
Penicillin
Sample: 2.0 sq. mm. of a transparent tape was placed inside the GLT desorption tube
Thermal Desorption: Block temperature: 150°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.
1. BHT
1
16.00
18.00
20.00
22.00
24.00
26.00
28.00
30.00
32.00
34.00
36.00
38.00
0
2000000
4000000
6000000
8000000
1e+07
1.2e+07
1.4e+07
1.6e+07
1.8e+07
2e+07
2.2e+07
Time
1 0 0 0 0 0 0
2 0 0 0 0 0 0
3 0 0 0 0 0 0
4 0 0 0 0 0 0
5 0 0 0 0 0 0
6 0 0 0 0 0 0
7 0 0 0 0 0 0
8 0 0 0 0 0 0
9 0 0 0 0 0 0
1 e + 0 7
1 . 1 e + 0 7
2 2 . 0 0
2 4 . 0 0
2 6 . 0 0
2 8 . 0 0
3 0 . 0 0
3 2 . 0 0
3 4 . 0 0
3 6 . 0 0
3 8 . 0 0
4 0 . 0 0
4 2 . 0 0
4 4 . 0 0
0
1. THC
1
Residue equivalent to
a 90% evaporated
gasoline sample
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
2
4
6
8
10
12
14
16
18
20
22
24
26
500000
1000000
1500000
2000000
2500000
3000000
3500000
0
20.00
25.00
30.00
35.00
40.00
45.00
Time
Plastic Food Wrap
Marijuana
Arson Wick
Recycled Cardboard
Plastics and Packaging Materials
Packing materials including plastics provide a unique appli-
cation of the Direct Thermal Extraction Technique to analyze the
surface contaminants on these materials.
Forensic Applications
The Direct Thermal Extraction Technique can be used to ana-
lyze and compare forensic samples ranging from vegetation to
physical evidence.
Sample: 2.0 sq. in. piece of a clear plastic food wrap was placed inside the GLT desorption tube.
Thermal Desorption: Block temperature: 100°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.
Sample: 250 sq. mm. of recycled cardboard was placed inside the GLT desorption tube.
Thermal Desorption: Block temperature: 200°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.
Sample: 2 small threads from a Molotov cocktail were placed inside the GLT desorption tube.
Thermal Desorption: Block temperature: 150°C, Purge flow: 6.0 ml/min He,
Desorption time: 10.0 min. Initial column trap temperature: -10°C
Column: SPB, 30 meter x 0.75 mm I.D., 1.0 u film, -10° to 250°C at 12°/min.
Sample: 3.0 mg. of marijuana was placed inside the GLT desorption tube. Data courtesy NJSP.
Thermal Desorption: Block temperature: 200°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.
2000000
4000000
6000000
8000000
1e+07
1.2e+07
1.4e+07
1.6e+07
1.8e+07
2e+07
0
16.00
1 8 . 0 0
2 0 . 0 0
2 2 . 0 0
2 4 . 0 0
2 6 . 0 0
2 8 . 0 0
3 0 . 0 0
3 2 . 0 0
3 4 . 0 0
3 6 . 0 0
3 8 . 0 0
1. 2-ethyl hexanol
2. 3-ethyloctane
3. diethyl phthalate
4. dibutyl phthalate
5. Bis (2-ethyl hexyl)-
phthalate
6. Dimethylsqualene
7. Dioctyl phthalate
1
2
3
4
5
6
7
8
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