108
www.restek.comGC COLUMNS |
METAL MXT® CAPILLARY COLUMNS
General-Purpose Columns
MXT®-5 Structure
CH
3
CH
3
Si
95%
O
Si
5%
O
Similar to: (5%-phenyl)-methylpolysiloxane
also
available
Metal MXT®
PLOT Columns
See
page 129.
MXT®-5 Columns
(Siltek®-treated stainless steel)
(low-polarity phase; Crossbond® diphenyl 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.
• 4.5
"
standard coil diameter.
The diphenyl dimethyl polysiloxane stationary phase is the most popular GC station-
ary 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.
similar phases
DB-PS5, VF-5ht UltiMetal, UAC-5, UAC-5MS
*Maximum temperatures listed are for shorter length columns. Longer columns may have a different maximum temperature.
15-Meter
30-Meter
60-Meter
ID
df
temp. limits*
cat.#
price
cat.#
price
cat.#
price
0.25 mm 0.10 µm -60 to 330/430 °C 70205
70208
0.25 µm -60 to 360/430 °C 70220
70223
70226
0.50 µm -60 to 330/360 °C 70235
70238
70241
1.00 µm -60 to 310/340 °C 70250
70253
0.28 mm 0.25 µm -60 to 340/430 °C 70221
70224
70227
0.50 µm -60 to 315/400 °C 70236
70239
1.00 µm -60 to 310/360 °C 70251
70254
70257
3.00 µm -60 to 290/360 °C 70281
70284
0.53 mm 0.25 µm -60 to 340/430 °C 70222
70225
70228
0.50 µm -60 to 330/400 °C 70237
70240
1.00 µm -60 to 310/360 °C 70252
70255
70258
1.50 µm -60 to 300/360 °C 70267
70270
3.00 µm -60 to 290/360 °C 70282
70285
70288
5.00 µm -60 to 270/360 °C 70277
70279
70283
10-Meter
20-Meter
40-Meter
ID
df
temp. limits
cat.#
price
cat.#
price
cat.#
price
0.18 mm 0.20 µm -60 to 325/430 °C 71821
71822
71823
0.40 µm -60 to 315/400 °C 71824
71825
Siloxane (Polysiloxane 20) on MXT®-5
GC_CH00359
Column
MXT®-5, 15 m, 0.28 mm ID, 0.25 µm
(cat.# 70221)
Sample
Polysiloxane 20
Diluent:
Pentane
Injection
Inj. Vol.:
1.0 µL split (split ratio 100:1)
Inj. Temp.:
250 °C
Oven
Oven Temp.:
75 °C to 340 °C at 15 °C/min
Carrier Gas
H
1
, constant flow
Linear Velocity:
40 cm/sec
Detector
FID@ 340 °C
Notes
FID sensitivity: 16 x 10
-11
AFS
MXT® GC Column Ferrule Guide
GC Column ID GC Column OD Ferrule ID
0.18 mm
0.36 ± 0.001
0.4
0.25 mm
0.41 ± 0.001
0.5
0.28 mm
0.56 ± 0.001
0.6
0.32 mm 0.44 ± 0.0015
0.5
0.53 mm
0.74 ± 0.001
0.8