1.2 Do I need to purchase
any special equipment for the Syringeless Injector?
The Syringeless Injector comes with everything you need to get started.
A milligram balance and Bunsen burner would be helpful.
1.3 Do you have a Users Manual that I can download?
Yes, click here Syringeless Users
Manual ~ 7.0Mbytes
1.4 Can I get my samples
analyzed by Syringeless Injection?
Yes, we have a number of options starting from, no charge to comprehensive
analysis at competitive rates. Contact information
2.1 Do I need to make and any permanent changes to my Gas Chromatograph
to install the Syringeless Injector?
No, the Syringeless Injector simply replaces your injection port
2.2 Is it complicated
to install or operate?
Installation is similar to changing your injection port liner. Operation
involves simply rotating the Load/Run valve or either Load to load
a sample or Run to inject or remove the sample.
2.3 About how long will
it take to install the Syringeless Injector?
With a little experience, you should be able to switch from syringe
injection to Syringeless in about 5 minutes.
3.1 How do the volatiles transfer from my sample into the capillary
Your sample, which is contained within a Sample Vial, is moved into
the injection port and surrounds the capillary GC column. Volatiles
from your sample are swept with carrier gas into the column at the
same pressure and flow rate as the capillary GC column. There is
no need to expose your sample to elevated pressures in excess of
your injection port pressure in order for the volatiles to transfer
into the GC column.
3.2What causes the Sample
Vial to move into the Injection Port?
Gravity, when the Split Vent carrier gas supporting the sample vial
is removed the sample tube falls into the Injection Port.
3.3 What causes the
Sample Vial to be expelled from within the Injection Port?
Split Vent carrier gas, as the carrier gas enters the bottom of
the Injection Port it travels up and out through the Split Vent
carrying the Sample Vial with it.
3.4 How do I control
the amount of time the sample spends within the injection port transferring
volatiles into the capillary GC column?
With the injection ports Split / Splitless valve controller. When
operating in the Split Mode the sample vial is suspended in a flow
of carrier gas at the top of the Syringeless Injectors sample loading
area. Switching to Splitless Mode removes the supporting carrier
and the sample tube falls into the injection port. The duration
of time you choose stay in the Splitless Mode determines the extraction
time. Switching back to Split Mode expels the Sample Vial.
3.5 How many times is
the total volume of the Sample Vial flushed with carrier gas during
the transfer of volatiles into the GC column?
It depends on your column flow rate and extraction time. Example:
Column flow rate (1.5ml./min) x extraction time (2.0 min) = 3 ml.
Divide by Sample Vial volume of 0.180 ml. This results in a sample
vial being flushed 16.6 times during a 2 min extraction.
3.6 At what temperatures
can I operate the Syringeless Injector?
The full temperature range of your Gas Chromatograph Injection Port,
ambient to 400C
3.7 Does the Syringeless
Injector operate with packed GC columns?
No, the Syringeless Injector has been designed for maximum transfer
efficiency of sample volatiles directly into capillary GC columns.
It is not a device that has been modified to operate with capillary
GC columns from the older packed column technology.
3.8 Once my sample has
returned to the sample loading area, can I move the Sample Loading
Valve from RUN to LOAD position?
Moving the Sample Loading Valve from the RUN to LOAD position during
the analysis will have no effect on the chromatography.
3.9 Do I need to use
cryogenics (LN2 or CO2) to focus the sample volatiles within the
capillary GC column?
No, it depends on the type of column phase, phase thickness, initial
column temperature and boiling point of the material being collecting.
3.10 What is the shortest
duration the Sample Vial can spend within the Injection port transferring
volatiles into the column?
About 1 second, you will need to add an additional 1 to 2 seconds,
to the total injection time, to account for the time needed for
the Sample Vial to fall into the Injection port.
3.11 Is there a problem
with memory effects between runs?
No, a new disposable Sample Vial, which is acting as an Injection
Port Liner, is replaced for each injection.