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• 9 • 2008 vol. 3
Figure 2 Increase reproducibility and sample integrity with a PTV
On-Column liner.
1
3
2
1. nitroglycerin 500ng/mL
2. 1,3,5-trinitrotoluene 100ng/mL
3. 2,4,6-trinitrobenzene 100ng/mL
GC_EV01041
Figure 3 Improve sensitivity with larger injection volumes using a PTV On-Column liner.
Column: Rtx®-TNT1, 6m, 0.53mm ID, 0.5µm
(cat.# 562719)
with 5m x 0.53mm IP guard tubing
(cat.# 10045),
connected using PTV On-Column liner
(cat.# 24976)
Sample: 8095 Calibration Mix A and
8095 Calibration Mix B diluted in acetonitrile
Inj.: PTV injection port
splitless (15mL/min. @ 0.35 min.)
Inj. temp.: 55°C to 285°C @ 10°C/min.
(hold 10 min.)
Carrier gas: helium, constant flow
Linear velocity: 60cm/sec. @ 300°C
Oven temp.: 50°C to 280°C @ 10°C/min.
(hold 10 min.)
Det.: µECD @ 300°C, nitrogen make-up
gas @ 60mL/min.
GC_EV01042A-C
Injection Volume
— 100µl
— 50µl
— 5µl
TNT
Product Listing
0.9986 (TNB) and 0.9997 (TNT) were obtained.
Note that a linear response is maintained—even
for high injection volumes.
Why pay for two injection ports when a simple
liner change gives you the benefits of having two
inlets in one? Using a PTV On-Column liner saves
you money and gives you flexibility in the lab. Use
this liner and reliably perform true cold on-col-
umn injections with your PTV injection port.
PTV Liners for Agilent GCs
ID* x OD & Length qty. cat.# price
PTV On-Column Liner
1.7mm x 3.0mm x 71mm ea. 24976
1.7mm x 3.0mm x 71mm 5-pk. 24977
*Nominal ID at syringe needle expulsion point.
nitroglycerin
TNT & TNB
TNB
Absolute area reproducibility improves for all compounds, and sensitive compound
responses improve dramatically because of the lack of contact with the injection port.
nitroglycerin: Absolute Area % RSD = 2.6% • Relative Area % RSD = 1.6%
TNT: Absolute Area % RSD = 1.5% • Relative Area % RSD = 1.4%
Nitroglycerin response and reproducibility
improve through on-column injection.
Five repetitions
of a 100/500ppbv EPA
8095 Explosives
Standard Mix (A&B)
Column: Rxi®-5ms, 6m, 0.53mm ID, 0.5µm (cat.# 563153) with 5m x 0.53mm IP guard tubing (cat.# 10045),
connected using PTV On-Column liner (cat.# 24976); Sample: 8095 Calibration Mix A and 8095 Calibration
Mix B diluted in acetonitrile; Inj.: PTV injection port splitless (15mL/min. @ 0.35 min.); Inj. temp.: 55°C to
285°C @ 10°C/min. (hold 10 min.); Carrier gas: helium, constant flow; Linear velocity: 60cm/sec. @ 300°C;
Oven temp.: 50°C to 280°C @ 10°C/min. (hold 10 min.); Det.: µECD @ 300°C, nitrogen make-up gas @
60mL/min.
Get More!
Visit
and download:
• Explosives and Brominated Flame Retardant
Analysis by Gas Chromatography with a New
On-Column Injector Liner for a Programmable
Temperature Vaporizing Injector
• Using Guard Columns and Retention Gaps in GC
800-356-1688 •