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ASTM 6730 DHA Evaluation Mix
0
20
40
60
Time (min)
1
2
3
4
5
6
7
8
9
11
12
13
14
30 29
28
27
26
25
24
23
22
21
20 19
18
17
16
15
10
Peak #
1. ethanol
2. C5
3. t butanol
4. 2methylbutene2
5. 2,3 dimethylbutane
6. MTBE
7. C6
8. 1methylcyclopentene
9. Benzene
10. cyclohexane
11. 3 ethylpentane
12. 1 t 2 dimethylcyclopentane
13. C7
14. 2,2,3 trimethylpentane
15. 2,3,3 trimethylpentane
16.
Toluene
17.
C8
18.
Ethylbenzene
19.
P xylene
20.
2,3DMH
21.
C9
22.
5methylnonane
23.
1,2methylethylbenzene
24.
C10
25.
C11
26.
1,2,3,5,tetramethylbenzene
27.
Naphthalene
28.
C12
29.
1methylnaphthalene
30.
C13
Column :100m x 0.25mm Rtx-DHA-100,df =0.5um
Oven temp. : 5 ºC,( 6.5min.),18ºC/min→ 48ºC,( 30min.), 3.5ºC/min→ 200ºC
Carrier gas :H2,Flow5mL/min (ConstantFlow))
Focusing on Critical Areas of Resolution
3. t butanol
4. 2methylbutene 2
8. 1methylcyclopentene
9. Benzene
15. 2,3,3 trimethylpentane
16. 16.Toluene
3
4
9
8
16
15
Column :100m x 0.25mm Rtx-DHA-100,df =0.5um +2.6 m tuning column
Oven
:35C for 15minutes, than ramped to 250C at10/minuteand heldfor 20minutes.
Carrier
: H2,5mL/min, 64 cm/s
20 min
3.25>R <5.25
Gasoline Analysis Following ASTM D6730,
Helium as carrier gas
C3
n-C
n-C
n-C
n-C
n-C8
n-C9
n-C10
0
50
100
150
Column :100 x0.25mm Rtx-DHA-100 , tuned5%phenyl PDMS
Oven
:5°C, 10min -> 50°C, 5°C/min,54min, --> 200°C, 1.3 °C/min
Carrier gas : He, 24 cm/s, 39.3 Psi; Injection Split, 1 : 150; Detection :
FID;
Following the 6730 method:
Near
3
hours analysis time;
Using HELIUM