Site Preparation / Installation
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2-23
2.13
Loop Calibration for Internal Standard
The absolute volume of the internal loop of the standard valve must be
determined to achieve accurate sample data. The stated 1 µL volume is
approximated within the stated tolerance from the valve manufacturer. For
absolute internal standard accuracy, use the following calibration procedure
before beginning your sample analysis.
1. Prepare a reference standard equivalent to a 1 µL volume injection via the
valve.
2. Run the calibration standard by hand (put 5 mL directly into the sparge tube.
3. Run blanks in the Archon manual mode. Note: Be sure the manual mode
program calls for internal standard when running the blanks.
4. Calibrate the internal standard data by comparing the Archon data to the
hand standard.
2.14
Installation Checklist
Verify the following during and after installation of the Archon.
Be certain the sample tray is pushed all the way to the rear most
position in the cabinet.
Confirm the supply helium pressure is between 70-90 PSI
5 PSI.
Be certain the handle, on the black sample valve located on top of the
sparge vessel, is rotated in the position of the water transfer line.
Do not overtighten the cap on the blank/wash bottle. To properly
tighten the cap, turn it until snug, then stop.
Be certain the septum used for the soil samples is
P/N DY-504104-00. It is extremely important that this low bleed
septum is used because it is formulated for maximum sealing ability
with minimum bleed of siloxane compounds that might interfere with
chromatographic results.
The caps, when used on SoilVials, must be tightened 1/4 turn past
finger tight to prevent leakage. A slight depression can be observed in
the septum when the cap is properly tightened.
Please review Sections 7.3 and 7.4, in this manual, “Cleaning the Soil
Transfer Line Frit and Replacement of the Water Line Screen.”
Perform system leak check on the purge and trap as specified in the
Tekmar LSC 2000, 3000, OI 4460 and OI 4560 manuals.
This procedure will check all of the new fittings installed at the 4-way
cross in the Tekmar 3000 & 2000 and at the external upper soil valve
supplied with the Archon.
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