SemivolatilesWool
The new deactivation used on this wool gives it superior inertness
for semivolatiles analysis. Acidic semivolatile compounds, such as
2,4-dinitrophenol (DNP), are reactive and can be difficult to
quantify with wool packed in the inlet liner. With this innovative
deactivation, the response of DNP is excellent and an improve-
ment over deactivations offered by competitors (Figure 1). For
example, the test shown here resulted in a DNP response factor of
0.21 (calculated relative to the internal standard), easily meeting
the EPA Method 8270D criterion of 0.01. In contrast, the com-
petitive “MS Certified Liner with Wool” showed virtually no
response.
To order Semivolatiles Wool in prepacked liners, add the corre-
sponding suffix number to the liner catalog number.
214
GC ACCESSORIES |
INSTRUMENT SUPPLIES
Liner Pack ing Mater ials
Base-DeactivatedWool
Ideal for amines and other basic
compounds.
Description
qty.
cat.#
price
Base-Deactivated Wool
10 grams 20999
Replacement CarboFrit® Inserts
CarboFrit® Puller/Inserter Tool
• Hook end for removing CarboFrit® inserts.
• Bent end (90°) for inserting CarboFrit® inserts.
Description
qty.
cat.#
price
CarboFrit Puller/Inserter Tool
ea.
21642
CarboFrit® Inlet Liner Packing Material
• Highly inert.
• Extends analytical column lifetime.
• Enhances reproducibility of split and
splitless injection.
• Uniform pore size and consistent packing
density guarantee consistent flow through
the liner.
• Easy to install in any liner with an ID
>3.5 mm when using puller-inserter tool
listed below.*
*Liners with IDs less than 3.5mm are difficult to pack. We will pack them on a
custom basis (minimum neck ID of 2mm required).
Description
suffix
price
each
-209.1
addl. cost
5-pk.
-209.5
addl. cost
25-pk.
-209.25
addl. cost
Use of Packings with Autosampler
We recommend using an injection port liner with wool or CarboFrit®
packing when making injections with an autosampler. If there is no
packing material in the liner, the solvent droplets act like water on a hot
iron: they bounce around until vaporized (Leidenfrost phenomenon).
Because autosamplers make rapid injections, samples can be incom-
pletely vaporized, leading to nonreproducible peak response and tailing.
You can prevent this by using wool or CarboFrit® packing material in the
splitless liner, to provide a surface for the solvent droplets to “sit” on until
the heat from the injector vaporizes them.
Add the corresponding suffix number to the liner catalog
number.
DeactivatedWool
• More inert than our traditional fused
silica wool.
• Use to vaporize a sample in a liner
prior to introduction into a capillary
column.
Description
qty.
cat.#
price
Deactivated Wool
10 grams 24324
21642
Prepacked Inlet Liners
Let Restek do the work! Just add the appropriate suffix to the
liner catalog number.
†CarboFrit inserts require a neck greater than 2mm.
qty.
Wool
CarboFrit†
price
ea.
-200.1
-209.1
addl. cost
5-pk.
-200.5
-209.5
addl. cost
25-pk.
-200.25
-209.25
addl. cost
tech
tip
Figure 1
Response of 10 ng of 2,4-dinitrophenol compared to
phenanthrene using a flame ionization detector.
qty.
IP Deactivated Liner with Semivolatiles Wool
each
-231.1
$16
addl. cost
5-pk.
-231.5
$31
addl. cost
25-pk.
-231.25
$81
addl. cost
Description
qty.
cat. #
price
Frits for liner ID
≤
4mm
10-pk.
20295
Frits for liner ID >4mm
10-pk.
20294
Website :
E-mail :
TelNo : 03 9762 2034 . . . in AUSTRALIA
Mar 2011
