|
007-CW and
BTR-CW are the Quadrex designations for an ethylene
glycol/siloxane copolymer. This polymer can be used to
separate compounds at temperatures not normally
associated with polyethylene glycol (PEG, CarbowaxTM)
phases. Both the lower and upper temperature limits of
traditional Carbowax type columns are extended with this
phase.
In
addition, Quadrex offers a modified version of the
007-CW phase, designated BTR-CW, which incorporates an
anti-oxidant moiety to better withstand oxygen
degradation. The BTR-CW phase offers increased thermal
stability and longer column lifetimes. See
additional information below.
The
hydrogen bonding interactions of the 007-CW and BTR-CW
phases makes them well suited for the analysis of polar
compounds such as solvents, flavors, perfumes, and
essential oils. These phases are not recommended for the
analysis of mixtures containing silylating reagents.
 |
Bonded and
crosslinked |
|
|
Moderately
polar |
|
|
Comparable to Carbowax
20M* |
|
|
Similar phases:
DB-Wax, Stabilwax,
AT-Wax, HP-20M, HP-Innowax, Supelcowax-10,
BP-20,
CPWax-52CB |
|
|
USP Phase Specification:
G16 |
|
|
* Carbowax is a trademark of
Union Carbide Corporation |
BTR-CW,
OXYGEN-RESISTANT PHASE:
Columns
coated with bondable PEG and, even more so with
traditional Carbowax 20M, deteriorate in the presence of
oxygen. It has been necessary, therefore, to maintain an
oxygen-free chromatographic system. To lower the
costs of maintaining such a system and to improve the
chromatographic properties of the PEG-type columns, we
offer the oxygen-resistant BTR-CW phase type.
BTR-CW is a polyethylene glycol (PEG) phase, similar to
our 007-CW phase, but which incorporates an anti-oxidant
moiety to better withstand oxygen exposure and the
resultant degradation. The BTR-CW also offers
increased thermal stability and longer column lifetimes.
007-CW/BTR-CW, Polyethylene
Glycol (PEG) columns are available
in all standard column I.D.'s and lengths.
The film thickness ranges are noted in the
chart below. |
|
I.D. |
10M. |
15M. |
25M. |
30M. |
50M. |
60M. |
75M. |
100M. |
STANDARD
FILM THICKNESS RANGE |
|
0.10mm |
 |
|
|
|
|
|
|
|
0.1 -
0.25µm |
|
0.18mm |
|
|
|
|
|
|
|
|
0.1 -
0.5µm |
|
0.25mm |
|
|
|
|
|
|
|
|
0.1 -
1.0µm |
|
0.32mm |
|
|
|
|
|
|
|
|
0.1 -
3.0µm |
|
0.53mm |
|
|
|
|
|
|
|
|
0.1 -
5.0µm |
|
Inquire with
tech@quadrexcorp.com
about custom lengths and films. |
|
007-CW/BTR-CW
OPERATING TEMPERATURE RANGE |
|
film thickness |
temperature range |
|
up to 1.0µm |
20° C to 280° C |
|
2.0 to 5.0µm |
up to
240°C |
|
|
|
|
Bonded Phase Retention Index |
|
|
benzene |
1-nitropropane |
2-pentanone |
pyridine |
butanol |
|
007-CW |
923.30 |
1214.35 |
923.30 |
1205.08 |
1137.80 |
|
BTR-CW |
967.80 |
1218.58 |
1005.78 |
1205.75 |
1150.69 |
|
