Whilemidpolarity624 type stationaryphases arewidelyused foranalyzingpolaranalytes andvolatileorganiccompounds (VOCs),
not all columns combine the selectivity needed for critical separations with the high inertness and low bleed that can further
improve dataquality.Whether you aredevelopingmethods for residual solvents, analyzing environmentalVOCs, or runningother
applications for volatile organics, you can improve data quality withRxi®-624SilMS columns. These new columns incorporate a
new stationaryphase chemistry, unique columndeactivation, andoptimizedmanufacturingprocess that is specificallydesigned to
provide thehigh inertnessand thermal stabilityneeded forgreateraccuracyand lowerdetection limits.Theunique selectivity, inert-
ness, and thermal stability of the Rxi®-624Sil MS columnmake it ideal for numerous applications, from detecting impurities in
pharmaceuticals tomonitoring environmentalVOCs.
Exceptional InertnessProvidesBetterPeakShape,HigherSensitivity, andMoreAccurateData
Column inertness is difficult to achieve, but critical to improving data quality. The deactivation process used for Rxi®-624SilMS
columns yields a fully passivated surface that is demonstrably more inert than other 624 columns. Comprehensive deactivation
results inhigher responses,more symmetricpeaks, and easy, accurate integration, even for active compounds at low levels (Figures
1 and 2). Rxi®-624Sil MS columns, with their superior deactivation, provide the inertness needed for improved linearity, greater
accuracy, and lower detection limits.
Figure2
Active compounds like isopropylamine canbemoreaccurately integratedonanRxi®-624SilMS column, lower-
ing levelsof quantification (LOQs) and increasingdataaccuracy.
Figure1
Highly inert Rxi®-624SilMS columnsprovidebetter peak shapeand simplify integration for active compounds
at low levels (5ngon-column).
GC_PH1162
Peaks
Conc.
(µg/mL)
1. Isopropylamine
100
2. Diethylamine
100
3. Triethylamine
100
Rxi®-624SilMScolumnsgivemore
accurate results foractivecompounds.
GC_PH1164
GC_PH1163
ZB-624
Poor peak shapeand
shifting retention
timesprevent
accurate integration
below25ng.
Rxi®-624SilMS
Reproducible retention
times andaccurate
integration
5-100ngon-column,
R
2
=0.99996
Improvesensitivity
andconfidence in
dataaccuracywith
anRxi®-624SilMS
column.
Same conditions as Figure 1.
Rxi
®
-624Sil MS
DB-624
ZB-624
Highly
reactive
Poor peak
shape due to
high activity,
low inertness
Low reactivity
Moderately
reactive
1
2
3
Column: 30m, 0.32mm ID, 1.8µm; Injection: Inj. Vol.: 1µL split (split
ratio 20:1); Liner: 5mm SingleGooseneckwithWool (cat.# 22973-200.1);
Inj.Temp.: 250 °C; Oven: OvenTemp: 50 °C (hold 1min.) to 200 °C at 20
°C/min. (hold 5min.); Carrier Gas: He, constant flow; Linear Velocity: 37
cm/sec.; Detector: FID@ 250 °C; Instrument: Agilent/HP6890GC.
NEW!
Rxi
®
-624SilMSColumns:
IncreaseConfidence inDataAccuracy
NEW!
Rxi
®
-624SilMSColumns:
creaseCo fidence inDataAccuracy
2
Website :
:
: 03 9762 2034 . . . inAUSTRALIA2
