Figure 1
Endrin and DDT breakdown is significantly reduced with Sky™ liners, demonstrating higher inertness.
Peaks
1. DDE*
2. Endrin
3. DDD*
4. Endrin aldehyde*
5. DDT
6. Endrin ketone*
*breakdown products
Column Rxi
®
-5Sil MS, 15 m, 0.25 mm ID, 0.25 µm (cat.#
13620); Sample endrin (50 ng/mL) and DDT (100 ng/mL) in
hexane; Injection Inj. Vol.: 1 µL splitless (hold 0.75 min.);
Liner: Comparison of Sky™ Single Taper Gooseneck Liner
with Wool (cat.# 23303.5) and Agilent Single Taper
Gooseneck Liner with Wool (cat.# 5062-3587); Inj. Temp.:
250 °C.
GC_EV1200
GC_EV1202
Inert Sky™ liners reduce
analyte breakdown, giving
you more accurate results.
1
2
3 4
5
6
1
2
3 4
5
6
Restek Sky™ Inlet Liner
Single taper gooseneck
with wool
Agilent
Single taper gooseneck
with wool
Many chromatographic problems, such as poor response and missing or tailing peaks are caused by activity in the inlet liner.
These effects complicate quantification and can be particularly problematic for sensitive analytes. New Sky™ inlet liners from
Restek offer exceptional inertness, assuring enhanced transfer of analytes to the column, good response, and highly symmet-
ric peaks. The inertness of these liners is due to a state-of-the-art deactivation process that completely passivates the liner and
wool so that they are inert to a wide variety of reactive analytes.
Some deactivations, such as base deactivation, are effective only for particular target compound chemistries. In contrast, the
balanced deactivation of Sky™ liners prevents interactions with many chemical classes. As shown on the following pages, com-
plex pesticide probes, as well as both acidic and basic compounds have strong responses and excellent peak shapes, demon-
strating the inertness of Sky™ liners. With new Sky™ inlet liners you will see improved sensitivity, accuracy, and reproducibil-
ity liner-to-liner, which allows you to quantify challenging compounds at trace levels with confidence.
Reduced Breakdown Improves Trace Analyses
Endrin & DDT are important analytes for the environmental and food safety industries, and also serve as excellent general
probes for liner inertness. Both compounds are sensitive to different modes of activity due to their chemical structures and
because they are analyzed at very low concentrations (typically parts-per-billion concentrations for µECD analyses). As shown
in Figure 1, Sky™ liners are significantly more inert than comparable liners from Agilent, showing 3-4 times less endrin and
DDT breakdown.
% Breakdown
endrin
4.8
16.5
DDT
1.3
4.2
Restek
Agilent
did you
know
?
Sky™ inlet liners from Restek are extensively tested to assure consistent product quality.
The color and label have been shown not to interfere with analyses or contribute to
background. Choose blue—the best liner for sensitive applications.
Simple Solutions:
Inert Sky™ Inlet Liners Improve Accuracy and Precision for a Wide Range of Analytes
2013
10
