ADV01-05_1-298

• 6 •

www.restekcorp.com

by Barry Burger, Petroleum Chemist, and Neil Mosesman, GC Columns Marketing Manager

Simplify Analyses of Permanent

Gases and Light Hydrocarbons

Using ShinCarbon ST Micropacked Columns

✔

Separate permanent gases, including CO/CO

, in 10 minutes, without cryogenic cooling.

✔

Rapid separations of permanent gas / light hydrocarbon mixtures.

✔

Excellent compatibility with most GC detectors—minimal bleed, minimal baseline rise.

✔

Pre-conditioned, less than 30 minutes to stabilize.

Analyzing the permanent gases oxygen, nitrogen,

methane, carbon monoxide, 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) or molecular

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

analyze methane, carbon monoxide, and carbon

dioxide, but column lengths in excess of six meters

(20ft.) and sub-ambient conditions are required to

separate oxygen and nitrogen.

Now, Restek's new ShinCarbon ST material, a high

surface area carbon molecular sieve (~1500 m

/g),

is the ideal medium for separating gases and highly

volatile compounds by GSC. A 2-meter by 1mm ID

Ordering Information

| ShinCarbon ST 100/120 Micropacked Columns

1-Meter

2-Meter

1.0mm

19809

19808

0.95mm

0.75mm

19810

—

2-Meter

" SilcoSmooth

™

2.0mm

80486-xxx

Figure 1

A ShinCarbon ST micropacked column sepa-

rates permanent gases in 10 minutes,

without cryogenic cooling.

Figure 2

ShinCarbon ST columns rapidly separate

light hydrocarbon / permanent gas mixtures.

ShinCarbon ST 100/120 mesh

2 meter x 1mm ID micropacked (cat.# 19808)

Sample:

Permanent gases

Sample size:

5µL

Inj. temp.:

100°C

Carrier gas:

helium

Flow rate:

10mL/min.

Oven temp.:

40°C (hold 3 min.) to 250°

@ 8°/min. (hold 10 min.)

Det.

HID @ 200°C

1. hydrogen

2. oxygen

3. nitrogen

4. carbon monoxide

5. methane

6. carbon dioxide

GC_PC00666

micropacked column containing ShinCarbon ST

separates the permanent gases in 10 minutes, 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 20 minutes. Other potential applica-

tions for ShinCarbon ST include analyses of low

molecular weight sulfur compounds or Freon

fluo-

rocarbons.

ShinCarbon ST is a highly stable material. Its 330ºC

upper temperature limit minimizes bleed and base-

line rise during temperature programming, making

the material compatible with most 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. This minimizes stabilization time

(less than 30 minutes) when installing a new col-

umn which, in turn, minimizes downtime.

The unique properties of ShinCarbon ST make it an

ideal packing material for analyses of gases and

highly volatile compounds, including permanent

gases, low molecular 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, combined with

careful conditioning during column manufacture,

ensures low-bleed operation and rapid stabilization

when installing a new column. Custom-made

ShinCarbon ST columns are available on request.

ShinCarbon ST 100/120 mesh

2 meter x 1mm ID micropacked (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 3 min.) to 250°

@ 8°/min. (hold 10 min.)

Det.:

HID @ 200°C

1. oxygen

2. nitrogen

3. carbon monoxide

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

PE Auto System

8300, 8400, 8700

(Not On-Column):

Suffix -840

Ordering Information

| ShinCarbon ST 80/100 Packed Columns

Column Configurations

Add the appropriate

suffix to the catalog

number when ordering

packed columns.

configurations.

Refer to our catalog or

website for

Scott gas standards for

permanent gases and

light hydrocarbons

2 3 4

Ordering Information

| Installation Kits

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