gc columns

GC COLUMNS | HIGH-PERFORMANCE RXI COLUMNSRxi® Columns OverviewLowest BleedRxi® columns are more stable at high temperatures than any other manufacturer’s column (Figure 5), resulting in higher system sensitivity.This low-bleed characteristic is the result of superior stabilization achieved by optimizing polymer cross-linking and surfacedeactivation technologies. Benefits of using ultra-low bleed Rxi® columns include:• Increased sensitivity, for lower detection limits and better matches to mass spectral libraries.• Faster system stabilization.• Reduced detector contamination and less downtime for maintenance.Figure 5 Rxi® columns have the lowest bleed among all major brands of columns.20.017.5Improve sensitivity and accuracy at tracelevels with low bleed Rxi® columns.Reference Peak1ng tridecane350°CDB-5ms15.012.510.0pA330°CDB-57.55.02.5HP-5msZB-5msVF-5msZB-5Rxi®-5ms0 2 4 6 8 10 12 14 16 18 20 22 24GC_EV008220.0Comparison of 30m x 0.25mm ID,0.25µm 5%-diphenyl columns at330°C through 350°C; hydrogencarrier gas; flame ionizationdetection.Exceptional ReproducibilityChromatographers today need to know that every column they receive is going to perform the same way as the column it replaces.Unmatched manufacturing precision and stringent quality control mean Rxi® columns exceed industry standards, resulting in the bestcolumn-to-column reproducibility available as measured by efficiency, retention, bleed, and inertness (Figure 6).Figure 6 Rxi® columns are engineered to assure column-to-column and lot-to-lot reproducibility.123 4 56 7 8Column 722883Batch #1Column 717989Batch #2Column 720331Batch #3GC_EV00819Column: Rxi ® -5ms, 30m, 0.25mm ID, 0.25µm (cat.# 13423)Sample: 500µg/mL Isothermal Column Test Mix in tolueneInj.:1.0µL, split injection (split ratio 1:100), 4mm single gooseneck inlet linerwith wool (cat.# 22405)Inj. temp.: 250°CCarrier gas: hydrogen, constant flowLinear velocity: 38cm/sec. @ 135°COven temp.: 135°CDet.: FID @ 330°C1. 1,6-hexanediol2. 4-chlorophenol3. methyl nonanoate4. 1-decylamine5. tridecane6. 1-undecanol7. acenaphthylene8. pentadecanewww.restek.com 39Website : www.chromtech.net.au E-mail : info@chromtech.net.au TelNo : 03 9762 2034 . . . in AUSTRALIA Mar 2011