Restek-2015

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133

GC COLUMNS |

PACKED/MICROPACKED COLUMNS

Bonded Stationary Phases

Restek’s packed columns deliver the

PUNCH!

1. Bonded stationary phases mean short .

conditioning times, low bleed, and .

unsurpassed column lifetimes.

2. SilcoSmooth® tubing provides the inertness

of glass and the durability of stainless steel.

3. Excellent retention time reproducibility for

reliable, consistent results!

Bonded Packed Column Stationary Phases

• Short conditioning times.

• Reproducible bonded phase selectivity.

• Low bleed levels.

• Longer column lifetimes.

• Unsurpassed inertness for active compounds.

Bonded phases are used in capillary columns because they provide a dramatic increase

in column quality. To truly bridge the gap between traditional packed columns and

capillary columns, it was necessary to develop bonded liquid phases for packed col-

umns. Packed column chromatographers can expect shorter conditioning times, lower

bleed, and longer column lifetimes by using Restek bonded phase packed columns.

Bonded phases also last much longer than nonbonded phases. Bonded phases are more

resistant to oxidation than nonbonded phases because of the stronger intermolecular

forces produced by cross-linking. Because the material is thoroughly cross-linked, the

phase will not migrate or puddle, as often happens with nonbonded phases. Figure 1

shows a comparison of a bonded and a nonbonded methyl silicone column after 170

temperature cycles. The results show the impressive durability of bonded phases.

Figure 1: Bonded packed columns exhibit longer lifetime than nonbonded packed columns.

GC_PC00369

Column

Rtx®-1 Sim Dist 2887, SilcoSmooth® Tubing, 25 inches,

in. OD, 2 mm ID (cat.# 80000-800)

Sample

1-12% (w/w) each component

ASTM D2887-01 calibration mix (1% each listed analyte in CS

) (cat.# 31674)

ASTM D2887-01 calibration mix (5% each, neat) (cat.# 31675)

Injection

Inj. Vol.:

1.0 µL packed not on-column

Inj. Temp.:

350 °C

Oven

Oven Temp.:

35 °C to 350 °C at 10 °C/min (hold 5 min)

Carrier Gas

He, constant flow

Flow Rate:

25 mL/min

Detector

FID@ 350 °C

Notes

FID sensitivity: 256 x 10

-11

AFS

Peaks

1. Pentane

2. Hexane

3. Heptane

4. Octane

5. Nonane

6. Decane

7. Undecane

8. Dodecane

9. Tetradecane

10. Hexadecane

11. Octadecane

12. Eicosane

13. Tetracosane

14. Octacosane

15. Dotricontane

16. Hexatricontane

17. Tetracontane

18. Tetratetracontane

Analytes cannot

be quantified

Low bleed after 170

cycles to 350 °C!

Nonbonded Methyl Silicone

Bonded Rtx®-1

Equivalent Liquid Phases

BP-1, CC-1, CP-Sil 5CB, DB-1, DC-200, GE-SF-96, HP-1, HP-101, OV-1, OV-101,

Rtx-1

RSK-150, RH-1, SE-30, SP-2100, SPB-1, UCC W-98, G2, G1

Rtx-5

BP-5, CB-5, CC-5, CP-Sil 8CB, DB-5, HP-5, OV-73, SE-52, SE-54, SPB-5, Ultra-5, G27, G36

Stabilwax

BP-20, CP-Wax, CW-20, DB-Wax, HP-Innowax, PE-Wax, Supelcowax-10, G16