Figure2
Chromatographicprofiles forwidelyused columnsproveRxi™-5mshas the lowest bleed.
similar
phases
DB-5, HP-5, HP-5ms, Ultra-2,
SPB-5, Equity-5
Rxi™-5ms (low-polarityphase,Crossbond®5%diphenyl /95%dimethylpolysiloxane)
• General purpose columns for semivolatiles, phenols, amines, residual solvents, drugs of abuse, pesti-
cides, PCB congeners or (e.g.)Aroclor®mixes, solvent impurities.
• Equivalent toUSPG27phase.
Rxi™-5msFusedSilicaColumns
Restek's Exceptionally Inert (Rxi
™
) FusedSilicaCapillaryColumns
• Unsurpassed inertness for low level basic andacidic compounds.
• Ultra-lowbleed
• Reliableperformance, guaranteed column-to-column reproducibility
• Guaranteed toworkperfectlywith retention time-locking software.
UltraLowBleed
Bleed fromRxi™-5ms columns is negligible, simplifying trace-level GC/MS analysis or detectionby
electron capture (ECD), nitrogen-phosphorus (NPD), or other sensitivemethods. The graphbelow
shows the bleed from 30m x 0.25mm, 0.25µm film columns.Compared to the other columns, includ-
ing silarylene type phases, theRxi™-5ms column exhibits the lowest bleed.
Columns included in the comparison areDB-5, DB-5ms, ZB-5, ZB-5ms, and VF-5ms.
20%
OFF
CH
3
CH
3
Si
95%
O
Si
5%
O
Column:
Rxi™-5ms 30m, 0.25 ID, 0.25µm (cat.# 13423)
Sample:
1ng on column tridecane in dichloromethane
Inj.:
1.0µL split (split ratio 40:1), 4mm splitless inlet liner
(cat.#20799)
Inj. temp.:
250°C
Carrier gas:
helium, constant pressure
Linear velocity: 60cm/sec.@ 135°C
Oven temp.:
135°C (hold 6min.) to 330°C@maximum rate(hold
4min.), to 350°C@maximum rate, (hold 6min.)
Det.:
FID@ 350°C
0
2
4
6
8
10
12
14
16
18
20
22
24
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
GC_EV00822
Reference Peak
1ng tridecane
Rxi-5ms
Competitor A
Competitor B
Competitor C
Competitor D
Competitor E
Competitor F
Detector: FID
330°C
Rxi™-5ms
pA
350°C
ID df (µm)
temp. limits
15-Meter
30-Meter
60-Meter
0.25mm 0.25 -60 to 330/350°C 13420-R25
$270 $203
13423-R25
$450 $338
13426-R25
$805 $604
0.40 -60 to 330/350°C
13481-R25
$450 $338
0.50 -60 to 330/350°C 13435-R25
$270 $203
13438-R25
$450 $338
13441-R25
$805 $604
1.00 -60 to 330/350°C 13450-R25
$270 $203
13453-R25
$450 $338
13456-R25
$805 $604
0.32mm 0.25 -60 to 330/350°C 13421-R25
$290 $218
13424-R25
$475 $357
13427-R25
$850 $638
0.50 -60 to 330/350°C 13436-R25
$290 $218
13439-R25
$475 $357
13442-R25
$850 $638
1.00 -60 to 330/350°C 13451-R25
$290 $218
13454-R25
$475 $357
13457-R25
$850 $638
0.53mm 0.25 -60 to 330/350°C 13422-R25
$320 $240
13425-R25
$535 $402
0.50 -60 to 330/350°C 13437-R25
$320 $240
13440-R25
$535 $402
1.00 -60 to 330/350°C 13452-R25
$320 $240
13455-R25
$535 $402
1.50 -60 to 330/350°C 13467-R25
$320 $240
13470-R25
$535 $402
ID df (µm)
temp. limits
12-Meter
20-Meter
25-Meter
50-Meter
0.18mm 0.18 -60 to 330/350°C
13402-R25
$385 $289
0.30 -60 to 330/350°C
13409-R25
$385 $289
0.36 -60 to 330/350°C
13411-R25
$385 $289
0.20mm 0.33 -60 to 330/350°C 13497-R25
$240 $180
13498-R25
$380 $285
13499-R25
$650 $488
