ADV06-15_1-412

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Figure 3:

Sulfur Compounds in Butane.

Figure 2:

The Rt®-Silica BOND PLOT column shows no large particle spikes, even with temperature and pressure variation.

15.8

15.6

15.4

15.2

15.0

14.8

14.6

Time (min)

Approximately

1 pA

GC_PC1276

Column

: Rt®-Silica BOND, 30 m, 0.32 mm ID (cat.# 19785);

Injection:

split (split ratio 35:1); Liner: Sky® 2.0 mm ID straight inlet liner (cat.# 23313.1); Inj. Temp.: 250 °C;

Oven:

Oven Temp.: 50 °C to 250 °C at 35 °C/min (hold 5 min) to 50 °C at 70 °C/min;

Carrier Gas:

He, constant flow; Linear Velocity: 114 cm/sec;

Detector:

FID@ 260 °C;

Make-up Gas Flow Rate: 50 mL/min; Make-up Gas Type: N

; Hydrogen flow: 40 mL/min; Air flow: 400 mL/min; Data Rate: 10 Hz;

Instrument:

Agilent 7890A GC

5.0

10.0

15.0

20.0

25.0

Time (min)

Excellent selectivity for sulfurs

in hydrocarbon streams!

Column

Rt®-Silica BOND, 30 m, 0.32 mm ID (cat.# 19785)

Sample

Conc.:

6 ppm in 100% butane

Injection

sample valve

Sample Loop Vol.:

250 µL

Inj. Temp.:

250 °C

Oven

Oven Temp.:

40 °C (hold 5 min) to 200 °C at 10 °C/min (hold 8 min)

Carrier Gas

He, constant flow

Flow Rate:

2 mL/min

Detector

PFPD from OI Analytical @ 250 °C

Element Mode:

sulfur

Instrument

Thermo Trace GC

Notes

This valve/loop injection employed a split injection technique.

Split flow was set to 40 mL/min.

Acknowledgement

Chromatogram courtesy of Jean-Louis Brix and Joeri Vercammen

(Global Analyser Solutions, Belgium)

Peaks

1. Carbonyl sulfide

2. Hydrogen sulfide

3. Butane

4. Carbon disulfide

5. Methyl mercaptan

6. Ethyl mercaptan

7. 1-Propanethiol

Rt®-Silica BOND Columns

(fused silica PLOT)

Description

temp. limits

cat.#

15 m, 0.32 mm ID

-80 to 260 °C

19784

30 m, 0.32 mm ID

-80 to 260 °C

19785

60 m, 0.32 mm ID

-80 to 260 °C

19786

Versatile Column for Many Applications

The new Rt®-Silica BOND column combines the retention, capacity,

and selectivity of traditional PLOT columns with virtually particle-free

performance and outstanding water resistance. Since water has only

a minimal impact on retention, water-containing samples can be ana-

lyzed without thermal conditioning between analyses. The bonded

silica surface provides excellent retention for light hydrocarbons,

permanent gases, and halocarbons, allowing for easy analysis of impu-

rities in light hydrocarbon streams. In addition to light hydrocarbon

analysis, the Rt®-Silica BOND column is especially selective for sulfur

compounds. Figure 3 illustrates the good separation of sulfur com-

pounds that can be achieved in butane.

In conclusion, the Rt®-Silica BOND column gives you the retention and

capacity you need from PLOT columns, along with good water resis-

tance and virtually particle-free operation. This provides the selectivity

and stability necessary for the highly reproducible analysis of hydro-

carbons, sulfur gases, and halogenated compounds. For additional

applications, visit

www.restek.com/ADV1517

Excellen selectivity

for sulfurs in

hydrocarbon streams!