Restek 2011/12 Chromatography Catalog - page 116

116 www.restek.com
GC COLUMNS | METAL (MXT®) CAPILLARY COLUMNS
General Purpose Columns
similar phases
DB-5, HP-5, HP-5MS, Ultra-2, SPB-5, Equity-5,
MDN-5, CP-Sil 8 CB
Note: DB-5MS is a silarylene based polymer
similar to Rxi®-5Sil MS.
CH3
CH3
Si
95%
O Si
5%
O
MXT®-5 Structure
similar phases
SPB-20, VOCOL
CH3
CH3
Si
80%
O Si
20%
O
MXT®-20 Structure
*Maximum temperatures listed are for 15- and 30-meter lengths. Longer lengths may have a slightly reduced
maximum temperature.
MXT®-20 Columns (Siltek® treated stainless steel)
(low to midpolarity phase; Crossbond® 20% diphenyl/80% dimethyl polysiloxane)
• General purpose columns for volatile compounds, flavor compounds, and alcoholic
beverages.
• Temperature range: -20 °C to 340 °C.
• Equivalent to USP G28, G32 phases.
MXT®-20 polymer is synthesized to exacting standards. All residual catalysts and low
molecular weight fragments are removed from the polymer, providing a tight
monomodal distribution and extremely low bleed.
MXT®-5 Columns (Siltek® treated stainless steel)
(low polarity phase; Crossbond® 5% diphenyl/95% dimethyl polysiloxane)
• General purpose columns for drugs, solvent impurities, pesticides, hydrocarbons,
PCB congeners (e.g. Aroclor mixes), essential oils, and semivolatiles.
• Temperature range: -60 °C to 430 °C.
• Equivalent to USP G27, G36 phases.
The 5% diphenyl/95% dimethyl polysiloxane stationary phase is the most popular GC
stationary phase and is used in a wide variety of applications. All residual catalysts and
low molecular weight fragments are removed from the MXT®-5 polymer, providing a
tight monomodal distribution and extremely low bleed.
ID df temp. limits* 15-Meter 30-Meter 60-Meter
0.25mm 0.10µm -60 to 430°C 70205 70208 70211
0.25µm -60 to 430°C 70220 70223 70226
0.50µm -60 to 400°C 70235 70238 70241
1.00µm -60 to 340°C 70250 70253 70256
0.28mm 0.25µm -60 to 430°C 70221 70224 70227
0.50µm -60 to 400°C 70236 70239 70242
1.00µm -60 to 325/360°C 70251 70254 70257
3.00µm -60 to 290/360°C 70281 70284 70287
0.53mm 0.25µm -60 to 430°C 70222 70225 70228
0.50µm -60 to 400°C 70237 70240 70243
1.00µm -60 to 325/360°C 70252 70255 70258
1.50µm -60 to 300/360°C 70267 70270 70273
3.00µm -60 to 290/360°C 70282 70285 70288
5.00µm -60 to 270/360°C 70277 70279 70283
ID df temp. limits 10-Meter 20-Meter 40-Meter
0.18mm 0.20µm -60 to 325/430°C 71821 71822 71823
0.40µm -60 to 325/400°C 71824 71825 71826
ID df temp. limits* 15-Meter 30-Meter 60-Meter
0.25mm 0.25µm -20 to 320/340°C 70320 70323 70326
1.00µm -20 to 300/340°C 70350 70353 70356
0.28mm 0.25µm -20 to 310/340°C 70321 70324 70327
1.00µm -20 to 295/340°C 70351 70354 70357
3.00µm -20 to 260/340°C 70381 70384 70387
0.53mm 0.25µm -20 to 310/340°C 70322 70325 70328
1.00µm -20 to 295/340°C 70352 70355 70358
3.00µm -20 to 260/340°C 70382 70385 70388
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