RestekCorporation
(800) 356-1688
1. ethanol
2. pentane
3. hexane
4. benzene
5. heptane
6. toluene
7. octane
8. ethylbenzene
9. m-xylene
10. p-xylene
11. o-xylene
12. nonane
13. propylbenzene
14. 1-methyl-3 ethylbenzene
15. 1,2,4-trimethyl-benzene
16. decane
17. undecane
18. naphthalene
19. dodecane
20. tridecane
Petrochemical
Restek’s Rtx
®
-1PONAColumn for theAnalysis of
PetroleumProducts
note
A
pplications
cat.#59568
Gasoline is a complexmixture contain-
inghundredsof individualhydrocarbons
includingalkanes (paraffins), alkenes
(olefins), cyclic alkanes (naphthenes),
and aromatics.Usinghigh resolution
gas chromatography (HRGC), it is
possible to resolve and identifyover
twohundred individual components in a
single analysis.Once thehydrocarbons
are identifiedandquantified, the results
canbe reported invariousways,
including: detailedhydrocarbonanalysis
(DHA), hydrocarbon type analysis, and
special calculations such as vapor
pressure andoctanenumber. Because
Tomeet demanding resolution
and retention criteria, Restekhas
developedunique quality control
tests and specifications for the
Rtx
®
-1PONA column.
A100meterRtx
®
-1PONA column resolves hundreds of
individual hydrocarbons ingasoline.
Figure 1
the taskof calibratinghundreds of
peaks is extremely time consuming,
committees such as theAmerican
Societyof Standards andMaterials
(ASTM) and theCanadianGeneral
StandardsBoard (CGSB) havedevel-
oped standardizedmethodology for
detailedhydrocarbon analysis
1,2
. These
methods specify a100-meter column
whichmust be reproducible if laborato-
ries are toobtain accurate results. The
RestekRtx
®
-1PONA columnmeets or
exceeds thedemanding resolution and
retention time requirements specified in
thesemethods.
An example of HRGC analysis of
unleadedgasolineusing theRtx
®
-
1PONA column appears in
Figure1
.
Thedetailed report obtained from this
analysis contains over 200 individual
peaks so identificationof each compo-
nent canbe very challenging. Since
flame ionizationdetection is specified,
identificationof the individual compo-
nents is practical only if the retention
times and separations are comparable to
those published in theASTMorCGSB
methods. Inorder tomeet these
demanding resolutionand retention
criteria, Restekhas developedunique
100m, 0.25mm ID 0.50µmRtx
®
-1PONA
0.5µl split injection of unleaded gasoline.
Oven temp.:
35°C (hold 13min.) to
45°C@ 10°C/min. (hold 15min.) to
60°C@ 1°C/min. (hold 15min.) to 200°C
@ 1.9°C/min. (hold 5min.).
Inj./det. temp.:
250°C
Carrier gas:
helium
Linear velocity:
24cm/sec. set @ 35°C
FID sensitivity:
4 x 10
-12
AFS
Split ratio:
100:1
RunConditions forFigures 1&2
1 2
min.10 20 30 40 50 60 70 80 90 100 110 120
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
Product Listing
Rtx
®
-1PONA:
(cat.#10195)
100m, 0.25mm ID, 0.5µm
