124
GCCOLUMNS |
PACKED/MICROPACKEDCOLUMNS
Bonded Stationary Phases
Figure1
Bondedpackedcolumnsexhibit longer lifetime thannonbondedpackedcolumns.
12
13
14 15 16
17 18
11 10 9 8765432
1
min. 0
10
20
30
NonbondedMethyl Silicone
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
25" x
1
/
8
" x 2mm IDRtx
®
-1 SimDist 2887 SilcoSmooth
®
stainless steel (cat.# 80000-800)
1.0µl direct injection, 1–12% (w/w) each component
Oven temp.:
35°C to 350°C@ 10°C/min. (hold 5min.)
Inj. & det. temp.:
350°C
Carrier gas:
helium@ 25mL/min.
FID sensitivity:
256 x 10
-11
AFS
cat.# 31674 (1% each listed analyte in CS
2
) and cat.# 31675 (5% each, neat) meet
requirements of ASTMD2887-01.
18 17 16 15 14
13
12
11 10 9 87654
1
32
Lowbleedafter170
cycles to350°C!
min. 0
10
20
30
BondedRtx®-1
GC_PC00369
Analytescannot
bequantified
Restek’spackedcolumnsdeliver the
1
-
2
-
3
PUNCH!
1. Bonded stationaryphasesmean short
conditioning times, lowbleed, and
unsurpassed column lifetimes.
2. SilcoSmooth® tubingprovides the inertnessof
glass and thedurabilityof stainless steel.
3. Silcoport®diatomaceous earthprovides
unsurpassed inertness for traceanalysis.
BondedPackedColumnStationaryPhases
• Short conditioning times.
• Lowbleed levels.
• Higher sensitivities.
• Longer column lifetimes.
• Unsurpassed inertness for active compounds.
Bondedphases are used in capillary columns because theyprovide a dramatic increase
incolumnquality.To trulybridge thegapbetween traditionalpackedcolumnsandcap-
illary columns, it was necessary to develop bonded liquid phases for packed columns.
Packed column chromatographers can expect shorter conditioning times, lower bleed,
and longer column lifetimes byusingRestekbondedphase packed columns.
Bondedphases also lastmuch longer thannonbondedphases.Bondedphases aremore
resistant to oxidation than nonbonded phases because of the stronger intermolecular
forces produced by cross-linking. Because thematerial is thoroughly cross-linked, the
phase will notmigrate or puddle, as often happens with nonbonded phases. Figure 1
shows a comparison of a bonded and a nonbondedmethyl silicone column after 170
temperature cycles.The results show the impressive durabilityof bondedphases.
EquivalentLiquidPhases
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, UCCW-98
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
Stabilwax
BP-20, CP-Wax, CW-20, DB-Wax, HP-Innowax, PE-Wax, Supelcowax-10
Website :
E-mail :
TelNo : 03 9762 2034 . . . inAUSTRALIA
Mar 2011
