• 6 •
by Barry Burger, PetroleumChemist, andNeil Mosesman, GCColumnsMarketingManager
Simplify Analyses of Permanent
Gases and Light Hydrocarbons
UsingShinCarbonSTMicropackedColumns
✔
Separate permanent gases, including CO/CO
2
, in 10minutes, without cryogenic cooling.
✔
Rapid separations of permanent gas / light hydrocarbonmixtures.
✔
Excellent compatibilitywithmost GC detectors—minimal bleed, minimal baseline rise.
✔
Pre-conditioned, less than 30minutes to stabilize.
Analyzing the permanent gases oxygen, nitrogen,
methane, carbonmonoxide, and carbon dioxide
has been virtually impossible for a single gas chro-
matography (GC) or gas solid chromatography
(GSC) column, without sub-ambient temperatures.
Porous layer open tubular (PLOT) ormolecular
sieve-packed columns are capable of separating the
small molecules, such as oxygen and nitrogen, but
adsorb larger-molecule gases, such as carbon diox-
ide. Porous polymer-packed columns, such as
Hayesep
®
Q, D, or A or Porapak
®
Q, can be used to
analyzemethane, carbonmonoxide, and carbon
dioxide, but column lengths in excess of sixmeters
(20ft.) and sub-ambient conditions are required to
separate oxygen and nitrogen.
Now, Restek's new ShinCarbon STmaterial, a high
surface area carbonmolecular sieve (~1500m
2
/g),
is the ideal medium for separating gases and highly
volatile compounds by GSC. A 2-meter by 1mm ID
Ordering Information
| ShinCarbonST 100/120MicropackedColumns
OD
ID
1-Meter
2-Meter
1
/
16
"
1.0mm
19809
19808
0.95mm
0.75mm
19810
—
OD
ID
2-Meter
1
/
8
" SilcoSmooth
™
2.0mm
80486-xxx
Figure 1
AShinCarbon STmicropacked column sepa-
rates permanent gases in 10minutes,
without cryogenic cooling.
Figure 2
ShinCarbon ST columns rapidly separate
light hydrocarbon / permanent gasmixtures.
ShinCarbon ST 100/120mesh
2meter x 1mm IDmicropacked (cat.# 19808)
Sample:
Permanent gases
Sample size:
5µL
Inj. temp.:
100°C
Carrier gas:
helium
Flow rate:
10mL/min.
Oven temp.:
40°C (hold 3min.) to 250°
@ 8°/min. (hold 10min.)
Det.
HID@ 200°C
1. hydrogen
2. oxygen
3. nitrogen
4. carbonmonoxide
5. methane
6. carbon dioxide
GC_PC00666
micropacked column containing ShinCarbon ST
separates the permanent gases in 10minutes, with-
out need for cryogenic cooling (Figure 1).
In addition to providing a breakthrough in analyses
of permanent gases, ShinCarbon ST columns can be
used to separate light hydrocarbon / permanent gas
mixtures. Figure 2 shows an analysis of permanent
gases plus acetylene, ethylene, and ethane, complet-
ed in less than 20minutes. Other potential applica-
tions for ShinCarbon ST include analyses of low
molecular weight sulfur compounds or Freon
®
fluo-
rocarbons.
ShinCarbon ST is a highly stablematerial. Its 330ºC
upper temperature limit minimizes bleed and base-
line rise during temperature programming, making
thematerial compatible withmost detection sys-
tems used for gas analysis, including TCD or HID.
All ShinCarbon ST columns are fully conditioned in
an oxygen/moisture free environment to prevent
contamination. Thisminimizes stabilization time
(less than 30minutes) when installing a new col-
umnwhich, in turn, minimizes downtime.
The unique properties of ShinCarbon STmake it an
ideal packingmaterial for analyses of gases and
highly volatile compounds, including permanent
gases, lowmolecular weight hydrocarbons and sul-
fur compounds, and Freon
®
gases. The rapid,
above-ambient analyses these columns provide will
be a great convenience. Excellent thermal stability
of the high surface area carbon, combinedwith
careful conditioning during columnmanufacture,
ensures low-bleed operation and rapid stabilization
when installing a new column. Custom-made
ShinCarbon ST columns are available on request.
ShinCarbon ST 100/120mesh
2meter x 1mm IDmicropacked (cat.# 19808)
Sample:
Permanent gases plus C1+C2
hydrocarbons
Sample size:
5µL
Inj. temp.:
100°C
Carrier gas:
helium
Flow rate:
10mL/min.
Oven temp.:
40°C (hold 3min.) to 250°
@ 8°/min. (hold 10min.)
Det.:
HID@ 200°C
1. oxygen
2. nitrogen
3. carbonmonoxide
4. methane
5. carbon dioxide
6. acetylene
7. ethylene
8. ethane
GC_PC00665
General
Configuration:
Suffix -800
Agilent 5880,
5890, 5987, 6890:
Suffix -810
Varian 3700, Vista
Series, FID:
Suffix -820
PE 900-3920
Sigma 1,2,3:
Suffix -830
8
3
/
4
"
PE Auto System
8300, 8400, 8700
(Not On-Column):
Suffix -840
6
1
/
2
"
Ordering Information
| ShinCarbon ST 80/100 PackedColumns
Column Configurations
Add the appropriate
suffix to the catalog
number when ordering
packed columns.
Contact us for custom
configurations.
Refer to our catalog or
website for
Scott gas standards for
permanent gases and
light hydrocarbons
2 3 4
Ordering Information
| InstallationKits
Exclusive!
for 0.75mm
ID col.
for 1mm
ID col.
For valve applications
21062
21065
For split applications
21063
—
For all Agilent GCs
21064
—
For direct injections
—
21066
