75
GC COLUMNS |
APPLICATION-SPECIFIC COLUMNS
Petroleum & Petrochemical
Detailed Hydrocarbon Analysis (DHA)
did you
know
?
Using hydrogen instead of helium can
cut analysis time in half! Visit
for complete
analytical details.
ASTM
Method
D6729
D6730
D6733
D5501
cat. #
10148
10148
&
10165
10147
10149
Dimensions
100m x 0.25mm, 0.50µm
100m x 0.25mm,
0.50µm w/ precolumn
50m x 0.20mm, 0.50µm
150m x 0.25mm, 1.0µm
Column
Rtx-DHA-100
Rtx-DHA-100 &
Rtx-5 DHA
Tuning Column
Rtx-DHA-50
Rtx-DHA-150
Gasolines are complex mixtures of hundreds of compounds. Information about con-
centrations of the individual components is important for evaluating rawmaterials and
for controlling refinery processes. ASTM D6730-01 outlines a high-resolution GC
method for detailed hydrocarbon analysis (DHA) of gasolines. Rtx®-DHA columns are
ideal for DHA methods and easily meet or exceed both ASTMD6730-01 and Canadian
General Standards Board CAN/CGSB 3.0 No. 14.3-99 requirements. Every Rtx®-DHA
column is tested for retention, efficiency, stationary phase selectivity, and bleed—
guaranteeing reproducible column-to-column performance.
Rtx®-DHA Columns
(fused silica)
(Crossbond® 100% dimethyl polysiloxane—optimized for hydrocarbon analysis)
• Columns meet or exceed all ASTM D6730-01 and CAN/CGSB 3.0 No. 14.3-99
method guidelines; test report for method D6730 supplied with each column.
• Excellent responses and peak symmetry for polar oxygenates.
Rtx®-5 DHA Tuning Column
(fused silica)
(Crossbond® 5% diphenyl/95% dimethyl polysiloxane—optimized for hydrocarbon analysis)
Critical pairs of gasoline components resolved per ASTM specifications on an Rtx®-DHA column.
10
20
30
40
50
60
70
80
90 min.
1
2
3
4
5
6
7
8
9
11
10
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
29 30
Column:
Rtx
®
-DHA, 100m, 0.25mm ID, 0.5µm (cat.# 10148)
plus Rtx
®
-5DHA tuning column, 2.62m, 0.25mm ID,
1.0µm, connected via Press-Tight
®
connector
(cat.# 20446)
Sample:
custom detailed hydrocarbon analysis
(DHA) mix, neat
Inj.:
0.01µL, split (split ratio 150:1), 4mm cup
inlet liner (cat.# 20709)
Inj. temp.:
200ºC
Carrier gas:
helium, constant flow
Linear velocity: 28cm/sec. (2.3mL/min.)
Oven temp.:
5ºC (hold 15 min.) to 50ºC @ 5ºC/min. (hold
50 min.) to 200ºC @ 8ºC/min. (hold 10 min.)
Det.:
FID @ 250ºC
1. ethanol
2. C5
3.
tert
-butanol
4. 2-methylbutene-2
5. 2,3-dimethylbutane
6. methyl
tert
-butyl ether (MTBE)
7. C6
8. 1-methylcyclopentene
9. benzene
10. cyclohexane
11. 3-ethylpentane
12. 1-
tert
-2-dimethylcyclopentane
13. C7
14. 2,2,3-trimethylpentane
15. 2,3,3-trimethylpentane
16. toluene
17. C8
18. ethylbenzene
19.
p
-xylene
20. 2,3-dimethylheptane
21. C9
22. 5-methylnonane
23. 1,2-methylethylbenzene
24. C10
25. C11 (undecane)
26. 1,2,3,5-tetramethylbenzene
27. naphthalene
28. C12 (dodecane)
29. 1-methylnaphthalene
30. C13 (tridecane)
Resolution
(1-methylcyclopentane/benzene): 1.28
Circles indicate critical pairs that must be resolved.
GC_PC00743
Excellent resolution and peak
shape improve DHA accuracy!
Method Recommended
NOTE: Rtx
®
-1PONA columns have been renamed as Rtx
®
-DHA columns. There are no changes in the
manufacturing process or column performance.
similar
phases
Petrocol DH, DB-Petro, HP-PONA,
CP-Sil PONA C8
NEW!
ID
df
temp. limits
50-Meter
100-Meter
150-Meter
0.20mm 0.50µm -60 to 300/340°C 10147
0.25mm 0.50µm -60 to 300/340°C
10148
1.00µm -60 to 300/340°C
10149
ID
df
temp. limits
5-Meter
0.25mm 1.00µm -60 to 340°C 10165
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
