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6
Stabilwax
®
-DBColumns for Basic Compounds
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
· Bonded phase reduces column bleed.
· Thermally stable to 220°C.
· Eliminates need for derivatization.
· No column priming required.
· Reproducible amine analyses.
· Stringently tested for analysis of difficult basic compounds.
Thiscolumnwasdeveloped toreduceadsorptionand improveresponseofbasic
compounds without the need for column priming. Analyses that previously
requiredderivatization,oranotheranalytical techniquesuchasHPLC,cannow
be performed on the Stabilwax
®
-DB column. In addition to the stringent Grob
test forefficiency,bleed,and inertness (excludingoxygenatedcompounds), the
Stabilwax
®
-DB column must also analyze a mixture that contains triamine,
diamine, andpropylamine. Thisadditional test ensures that everyStabilwax
®
-
DB column is basic enough to analyze these difficult amine compounds.
Some basic compounds, such as amines, are prone to adsorption in the GC
system, including the analytical column. The Stabilwax
®
-DB column is spe-
cially treated for better recovery and quantitation of amines (
Figure 5)
.
Figure 5
ImprovedRecovery andQuantitation of PrimaryAmines
(lowMW) on aStabilwax
®
-DBColumn
1. trimethylamine
2. dimethylamine
3. ethylamine
4.methylamine
5. isopropylamine
6. n-propylamine
7. tert-butylamine
8. diethylamine
9. sec-butylamine
1
2
3
4
5
6
7
8
9
Visit Restek on-line
at
for detailed product
information and to
order free literature.
30m, 0.53mm ID, 1.0µmStabilwax
®
-DB (cat.#10855)
1.0µl direct injection of lowmolecular weight amines inwater.
Oven temp.:
45°C isothermal;
Inj. & det. temp.:
250°C;
Carrier gas:
hydrogen;
Linear velocity:
40cm/sec. (flow rate: 5cc/min.);
FID sensitivity:
1 x 10
-11
AFS
c-gram #23
2
3
min. 1
UnbreakableMetal
CapillaryColumns
For harsh environments or spe-
cial applications where fused
silica tubingmaynot be the ideal
material,RestekoffersMXT
®
cap-
illarycolumns.MXT
®
columnsare
made fromunbreakable, thin-wall
stainless steel that has been
treated with our Silcosteel
®
pro-
cess.Thisprocessdepositsasub-
micron layerof flexible fusedsilica
on the insideof the tubing, giving
it the same inertness as an Rtx
®
column, butwith the ruggedness
of stainless steel. MXT
®
columns
are caged in small diameter coils
that are ideal for portable or pro-
cessGCs.
MXT
®
-Wax columns combine the
unique selectivityof thePEG sta-
tionary phases with the rugged
durability of stainless steel tub-
ing. These columns are ideal for
use in the process and portable
GC industries, where column
breakage isasignificantproblem.
See page 12 for
ordering information.
