Figure1
TheRxi™-1ms columnhas the lowest bleedavailable, allowingbetter accuracyand
lower detection limits for active compounds.
• Stableat high temperatures; improved signal tonoise ratios.
• Excellent inertness for acids andbases; predictable columnperformance.
• Engineered toassure column to column reproducibility.
The combinationof ultra lowbleedandunsurpassed inertnessmake theRxi
™
-1ms thebest
column choice for analysisusinga100%Polydimethyl siloxane stationaryphase.
LowestBleed
Restek chemists have developed a new GC column manufacturing technique that assures low bleed,
unsurpassed inertness, and exceptionally reproducible columns from batch to batch. The reduced bleed
and increased inertness produced by the newmanufacturing process result in increased signal to noise
ratiosand thus lowerdetection limits foractivecompounds.TheRxi
™
-1mscolumnoffersmaximumcom-
pound response for quantitativeGC andGC/MS analysis.
Wecompared thebleedprofilesof tencompetitor columns at both330°Cand350°C to theRxi
™
-1ms col-
umn. At both temperatures the Rxi
™
-1ms column exhibits the lowest bleed level or equivalent of all the
columns tested.
0 4 5
6 7
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
18
16
14
12
10
7
6
4
2
0
350°C
135°C
1ngTridecane Reference
Minutes
pA
Rxi
™
-1ms
Competitor A
Competitor B
Competitor C
Competitor D
Competitor E
Competitor F
Competitor G
Competitor H
Competitor I
Competitor J
330°C
please
note
Columns included in the
comparison areBP-1, DB-1,
DB-1ms, EQ-1, HP-1, HP-1ms,
Rtx-1, Rxi-1ms, VF-1ms, ZB-1,
and ZB-1ms.The bleed
profiles in Figure 1 are
labeled randomly.
New
Rxi™-1msFusedSilicaColumns
Restek's Exceptionally Inert (Rxi
™
) FusedSilicaCapillaryColumns
Column:
100% dimethyl polysiloxane 30m, 0.25 ID, 0.25µm
Sample:
1 ng. 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@ 30°C/min. (hold 4min.) to 350°C@ 15°C/min. rate
(hold 6min.)
Det.:
FID@350°C
Rxi™-1ms
