Restek 2011/12 Chromatography Catalog - page 51

www.restek.com 51
GC COLUMNS | GENERAL PURPOSE COLUMNS
Rtx®-20, Rtx®-35
similar phase
SPB-20, AT-20, 007-7
CH3
CH3
Si
80%
O Si
20%
O
Rtx ®-20 Structure
also available
Metal MXT® Columns
Rugged, flexible, Siltek® treated stainless steel
tubing; inertness comparable to fused silica
tubing. See page 116 for our MXT®-20 columns
and page 117 for our MXT®-35 columns.
Rtx®-35 Amine Columns
See page 65.
CH3
CH3
Si
65%
O Si
35%
O
Rtx ®-35 Structure
similar phases
DB-35, HP-35, SPB-35, SPB-608
Rtx®-20 Columns (fused silica)
(low to midpolarity phase; Crossbond® 20% diphenyl/80% dimethyl polysiloxane)
• General purpose columns for volatile compounds, flavor compounds,
alcoholic beverages.
• Temperature range: -20 °C to 320 °C.
• Equivalent to USP G28, G32 phases.
Rtx®-20 polymer is synthesized to exacting standards. All residual catalysts and low
molecular weight fragments are removed from the polymer, providing a tight mono-
modal distribution and extremely low bleed.
Rtx®-35 Columns (fused silica)
(midpolarity phase; Crossbond® 35% diphenyl/65% dimethyl polysiloxane)
• General purpose columns for organochlorine pesticides, PCB congeners (e.g.
Aroclor mixes), herbicides, pharmaceuticals, sterols, rosin acids, phthalate esters.
• Temperature range: 40 °C to 320 °C.
• Equivalent to USP G42 phase.
An Rtx®-35 column is a popular confirmation column for pesticides and herbicides, in
conjunction with an Rtx®-5 or Rtx®-1701 column. The higher phenyl content causes
useful elution order and retention time changes.
ID df temp. limits 15-Meter 30-Meter
0.25mm 0.25µm -20 to 300/320°C 10320 10323
0.50µm -20 to 290/310°C 10335 10338
1.00µm -20 to 280/300°C 10350 10353
0.32mm 0.25µm -20 to 300/320°C 10321 10324
0.50µm -20 to 290/310°C 10336 10339
1.00µm -20 to 280/300°C 10351 10354
0.53mm 0.25µm -20 to 260/280°C 10322 10325
1.00µm -20 to 260/280°C 10352 10355
ID df temp. limits 15-Meter 30-Meter
0.25mm 0.25µm 40 to 320°C 10420 10423
0.50µm 40 to 310°C 10435 10438
1.00µm 40 to 290°C 10450 10453
0.32mm 0.25µm 40 to 320°C 10421 10424
0.50µm 40 to 310°C 10436 10439
1.00µm 40 to 290°C 10451 10454
0.53mm 0.25µm 40 to 260/280°C 10422 10425
0.50µm 40 to 300°C 10437 10440
1.00µm 40 to 290°C 10452 10455
1.50µm 40 to 280°C 10467 10470
3.00µm 40 to 240/260°C 10482 10485
ID df temp. limits 10-Meter 20-Meter
0.18mm 0.20µm 40 to 300/320°C 40401 40402
0.40µm 40 to 290/310°C 40410 40411
Website :www.chromtech.net.auE-mail :info@chromtech.net.auTelNo : 03 9762 2034 . . . in AUSTRALIA Mar 2011