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GC COLUMNS |
APPLICATION-SPECIFIC COLUMNS
Pharmaceut ical
Class 1 residual solvents on a Stabilwax® (G16) column.
similar
phases
DB-WAX, DB-WAXetr, HP-Wax, HP-Innowax,
Supelcowax 10, CP-Wax 52 CB
H
H
C C O
H
H
Stabilwax
®
Structure
Organic Volatile Impurities (OVI) Analysis
GC_PH00951
Column:
Stabilwax
®
, 30m, 0.32mm ID, 0.25µm
(cat.# 10624)
Sample:
USP Stock Mixture USP<467> Residual
Solvents Class 1 Mix (cat.# 36279) in
20mL headspace vial (cat.# 24685),
water diluent
Inj.:
headspace injection (split ratio 1:5),
2mm splitless liner IP deactivated
(cat.# 20712)
Inj. temp.:
140°C
Carrier gas:
helium, constant flow
Flow rate:
2.15mL/min., 35.2cm/sec.
Oven temp.:
50°C for 20 min. to 165°C @ 6°C/min.
(hold for 20 min.)
Det.:
FID @ 250°C
Headspace Conditions
Instrument:
Overbrook Scientific HT200H
Syringe temp.:
100°C
Sample temp.:
80°C
Sample equil. time.: 45 min.
Injection vol.:
1.0mL
Injection speed:
setting 8
Injection dwell:
5 sec.
1. 1,1-dichloroethene
2. 1,1,1-trichloroethane
3. carbon tetrachloride
4. benzene
5. 1,2-dichloroethane
G16 phase
ordering
note
Get the protection without the connection!
For Stabilwax® columns with built-in
Integra-Guard® guard columns, see
page 35
.
For our complete listing of Stabilwax® columns, see
page 59
.
OVI
Retention
Index p.696
Stabilwax® Columns
(fused silica)
(polar phase; Crossbond® Carbowax® polyethylene glycol)
• Most stable polyethylene glycol (PEG) column available.
• Rugged enough to withstand repeated water injections.
• Lowest bleed PEG column on the market; long column lifetimes are assured
• Temperature range: 40 °C to 260 °C.
• Equivalent to USP G14, G15, G16, G20, and G39 phases.
Restek’s polar-deactivated surface tightly binds the Carbowax® polymer and increases
thermal stability, relative to competitive columns. Because of the increased stability pro-
duced by the bonding process, Stabilwax® columns exhibit long column lifetimes, even
when programming repeatedly up to 260 °C. The bonding mechanism of the column
also produces polar compound retention times that do not shift as is often observed on
other wax-type columns. In addition, this bonding mechanism produces a column that
can be rejuvenated by solvent washing.
ID
df
temp. limits
30-Meter
0.32mm 0.25µm 40 to 250/260°C
10624
0.53mm 0.25µm 40 to 250/260°C
10625
free
literature
Residual Solvent
Analysis
Download your free
copy from
www.restek.com
lit. cat.# PHFL1018A
Website : www.chromtech.net.au E-mail : info@chromtech.net.au TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011