RestekCorporation
(800) 356-1688
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1. benzene
2. toluene
3. ethylbenzene
4. p-xylene
5. m-xylene
6. o-xylene
TheRtx
®
-Wax column efficiently resolves all xylene isomers inBTEXanalysis.
Figure 4
30m, 0.53mm ID, 1.0µmRtx
®
-Wax (cat.# 12455)
0.25µl direct injection of a BTEX sample. On-column conc.: 50ppm
Oven temp.:
35°C to 75°C@ 2°C/min. (hold 5min.);
Inj./det. temp.:
200°C;
Carrier gas:
helium;
Linear velocity:
26cm/sec. set@ 35°C;
FID sensitivity:
8 x 10
-11
AFS
Rtx
®
-Waxexhibitsexcellent symmetrical peak shape foraldehydescompared to theStabilwax
®
column.
Stabilwax
®
(cat.#10638)
30m, 0.25mm ID, 0.50µm
Rtx
®
-Wax
(cat.#12438)
30m, 0.25mm ID, 0.50µm
Figure 5
Sample:
split injection of C2-C11 aldehydes
mixture
On-column conc.:
250ng.
Oven temp.:
40°C (hold 5min.) to 200°C@
10°C/min.;
Inj./det. temp.:
200°C;
Carrier gas:
hydrogen;
Linear velocity:
35cm/sec. set@ 40°C;
FID sensitivity:
8 x 10
-11
AFS;
Split ratio:
100:1
c-gram # 5030
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1. ethanal
2. propanal
3. butanal
4. pentanal
5. hexanal
Excellent Inertness for
Aldehydes
Most PEGcolumns caneffectively
analyze alcohols, esters, and acids, but
some exhibit peak tailingwith alde-
hydes. Because the stationaryphase
undergoesanextensivepurification
procedure, peak tailing in the analysis
of a series of aldehydes isnon-existent
on theRtx
®
-Waxcolumn as shown in
Figure 5
.
Incomparisonwithother available
Carbowax
®
columns, theCrossbond
®
Rtx
®
-Waxcolumnprovides anextended
operational temperature range, excellent
efficiency, selectivity, and superior
inertness.These advantagesmake it the
logical choice for allCarbowax
®
applications.
References
1
Sandra, P.; David, F.; Turner, K.A.;McNair,
H.M.; Brownstein, A.D. “Observations
with High-Molecular-Weight Polyethylene
Glycol Stationary Phases in Capillary Gas
Chromatography,”
Journal of Chromatogra-
phy
, 1989.
6. heptanal
7. octanal
8. nonanal
9. decanal
10. undecanal
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