Petrochemical
Restek Corporation • (800) 356-1688 • (814) 353-1300 •
Petrochemical
#59367
ASTMMethodD-6352 is a gas chromatography (GC) method
developed for the determination of petroleum distillates with a
boiling point range of 174
°
C to 700
°
C. Often referred to as
"high-temperature simulated distillation," thismethod requires
a capillary column capable of withstandingGC oven tempera-
tures up to 430
°
C. This presentsmany challenges for analysts
becausemost capillary columns aremanufactured using poly-
imide-coated fused silica tubing.At temperatures above 380
°
C,
even the best polyimide coating becomes brittle, which leads
to very short column lifetimes. In addition, themethyl silicone
stationary phase recommended in themethod alsomust sur-
vive these high temperatures.
TheMXT
®
-1HTSimDist column is amajor improvement in
column technology for high-temperature simulated distillation.
By combining a new, proprietary polymer synthesis technolo-
gy, Siltek
™
deactivation, and rugged Silcosteel
®
tubing, we
developed a capillary column that meets all the criteria of
Applications
note
Fast, High-Temperature SimDist AnalysesUsing
MXT
®
-1HTSimDist CapillaryGCColumn and theGCRacer
TheMXT-1HTSimDist column offers lower bleed and improvedpeak symmetry compared to other
high temperature columns.
RunConditions: C44-C100Hydrocarbons
Column:
MXT-1HTSimDist
Serial #:
339749B
Description:
5m, 0.53mmID, 0.10µm
Sample:
Polywax
®
1000
Part #:
36227
Solvent:
CarbonDisulfide
SampleSize:
0.2uL
Instrument:
HP6890GC
Injector:
on-column (track oven)
Carrier Gas:
Helium(constant pressure)
HeadPressure:
1.0psi
Linear Velocity:
60cm/sec.
FlowRate:
7.8mL/min.
Detector:
FID/430°C
Make upGas Flow: 40cc/min.
Temp. Program:
40°C to 430°C@10°C/min.
(hold 30min.)
ASTMMethodD-6352. ThisMXT
®
-1HTSimDist column is
available as in a 5m, 0.53mm ID, 0.1µm film dimension to
conform to the requirements of thismethod. It exceeds the res-
olution, peak shape, and bleed criteria for hydrocarbons rang-
ing up toC-110. Because theMXT
®
-1HTSimDist column is
coatedwith a 100% dimethyl polysiloxane polymer, it will
give the correct retention time/boiling point curve. TheMXT
®
-
1HTSimDist column exhibits low bleed and excellent inert-
ness, and the rugged Silcosteel
®
tubingwill hold up to temper-
atures in excess of 430°C.
To demonstrate the lower bleed and improved peak shape of
this innovative column, a Polywax
®
1000 referencematerial
was analyzed using aMXT
®
-1HTSimDist column and two
other columns that are commonly used for this application
(Figure 1)
. TheMXT
®
-1HTSimDist column exhibits lower
bleed and improved peak symmetry compared to competitor
columns.
Figure 1
RestekMXT-1HT Column
Competitor Column A
Competitor Column B
85pA
78pA
28pA
GC_PC00541
GC_PC00542
min. 0
10
20
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40
50
60
min. 0
10
20
30
40
50
60
min. 0
10
20
30
40
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60
GC_PC00530
C20
C30
C40
C50
C60
C70
C80
C90
C100
C110
C30
C40
C50
C60
C70
C80 C90
C100
C110
C30
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C60
C70
C80
C90
C100
