RestekCorporation • (800)356-1688 •
PeakList andConditions for Figure 3
Figure3
Distribution of C9 for varying types of petroleum are
different, which can aid in fuel identification and
quantitation.
Kerosene
1. hexane
2. benzene
3.
α
,
α
,
α
-trifluorotoluene (ss)
4. toluene
5. ethylbenzene
6.
m
-xylene
7.
p
-xylene
8.
o
-xylene
9. isopropylbenzene
Gasoline
40m, 0.45mm ID, 1.50µmRtx
®
-5Sil MS (cat.# 12798).
Injections of gasoline and kerosene.
Column flow:
9mL/min.;
Concentrator:
Tekmar LSC-3000 Purge&Trap, BTEX trap;
Interface:
direct with Siltek
™
transfer line;
Oven temp.:
40°C
(hold 2min.) to 85°C@ 4°C/min. (hold 1min.) to 225°C@ 40°C/min.
(hold 2min.);
Det.:
GC/MS SIMmode for ion 120 only.
10. 4-bromo-fluorobenzene (ss)
11.
n
-propylbenzene
12. 1-ethyl-3-methylbenzene
13. 1-ethyl-4-methylbenzene
14. 1,3,5-trimethylbenzene
15. 1-ethyl-2-methylbenzene
16. 1,2,4-trimethylbenzene
17. decane
18. 1,2,3-trimethylbenzene
min. 12.5
13.0
13.5
14.0
14.5
15.0
15.5
11
9
13
12
15
14
18
16
min. 12.5
13.0
13.5
14.0
14.5
15.0
15.5
11
9
13
12
15
14
18
16
eachchromatogram. 1-ethyl-2-methylbenzeneand1,2,3-
trimethylbenzenedistributions aredifferent for gasoline and
keroseneusingour standards.Other slight differenceswerenoted
between1-ethyl-3-methylbenzeneand1,3,5-trimethylbenzene
requiring separationof the ethyl-methylbenzene isomers. It is
important to stress that resultsmayvarydue todifferent fuel
sources and the degree ofweathering; the point is that the
distributionofC9 for varying types of petroleum aredifferent,
and these differences can aid in fuel identification and
quantitation.
The standards forMethodAK101AA consist of amixture of 13
aromatic compounds.Restekoffers thismixture completewith
quality assurance (QA) documentation and aCertificateof
Analysis,which canbe used for audits aswell as for internalQA
needs.OurAlaskaGRO standards aremade in the correct
concentrations, ensuring accurate identification andquantitation
of environmental samples.
Use of theRtx
®
-5SilMS column and the analyticalmethod
outlined inMethodAK101AAwill achieve the best possible
resolutionof the alkyl benzenes and all the listedbranched
aromatics.
for
more
info
Request the
Rtx
®
-5SilMSCapillaryColumns
flyer
(lit. cat.# 59204).
