NPD Overview . 157
CAUTION
When reconnecting the air and hydrogen lines to the bulkhead,
insert the tubing into the bulkhead fitting until it bottoms. Then
pull the tubing back slightly and tighten the nut to make a leak-free
connection.
Do not overtighten the nut!
NOTE: Any time the line pressure is changed from 30 psig, you must re-measure and adjust the air flows.
NOTE: The flows listed in the above procedures for hydrogen and air are optimum for both capillary and packed
column flow rates. The optimum flow provides the best sensitivity (signal to noise), selectivity, and bead
life. Any changes to these flows will affect all of these parameters. Also when using capillary columns,
makeup gas is not required.
NPD Bead Activation Procedure
Packed Column Setup:
Disconnect column and cap the oven end of the detector. The recommended Detector Cap Nut is in
the 1/8-in. Plug Kit (P/N N9300061).
Capillary Column Setup:
With a capillary column connected, adjust Carrier flow to 0.5 mL/min or less (but not 0 ), or
(preferred) disconnect the column and cap the oven end of the detector.
Preparing to Activate the NPD Bead
To activate a NPD bead:
NOTE: Never activate a NPD bead with a column connected to the detector fitting. To properly activate the NPD
bead, the column must be removed from the detector fitting and the detector fitting must be capped.
1.
Obtain a stopwatch or use the stopwatch function in the GC Utilities screen.
2.
Open the oven door and allow the oven to cool.
3.
Using a 7/16-inch wrench, loosen and remove the column nut from the detector fitting. Remove
the column from the detector fitting.
4.
Install a 1/8-inch Swagelok plug (P/N N9300061) on the detector fitting. Provide a leak-free seal
by tightening the plug with a 7/16-inch wrench.
5.
Close the oven door. Maintain a carrier gas flow through the column.
6.
Install the bead in the conventional manner according to the installation procedure in the GC
Hardware Guide. Make sure that the bead does not contact any other surfaces.
7.
Set the following conditions in the following order:
First set the Detector temperature to 150 deg. C. or greater. Wait for the detector temperature
to stabilize.
Содержание CLARUS 590 GC
Страница 1: ...CLARUS 590 GC User s Guide GAS CHROMATOGRAPHY ...
Страница 9: ...About This Manual 9 Flame Ionization Detector FID 270 TCD 273 Autosampler 277 Index 279 ...
Страница 10: ...10 Clarus 590 GC User s Guide ...
Страница 11: ...1 Introduction ...
Страница 12: ...12 Clarus 590 GC User s Guide ...
Страница 21: ...2 Touch Screen Navigation ...
Страница 22: ...22 Clarus 590 GC User s Guide ...
Страница 48: ...48 Clarus 590 GC User s Guide PPC Active Method Configuration Screen Manual Pneumatics ...
Страница 50: ...50 Clarus 590 GC User s Guide PPC Active Method Configuration Screen Manual Pneumatics ...
Страница 59: ...3 Using the Active Method ...
Страница 60: ...60 Clarus 590 GC User s Guide ...
Страница 109: ...4 Setting Up the Detectors ...
Страница 110: ...110 Clarus 590 GC User s Guide ...
Страница 197: ...5 Using the Method Editor ...
Страница 198: ...198 Clarus 590 GC User s Guide ...
Страница 207: ...6 Using the Tools Menu ...
Страница 208: ...208 Clarus 590 GC User s Guide ...
Страница 224: ...224 Clarus 590 GC User s Guide ECD PID NPD FPD ...
Страница 225: ...Detectors 225 Output Configured ...
Страница 262: ...262 Clarus 590 GC User s Guide ...
Страница 263: ...7 Setting up a Typical Analysis ...
Страница 264: ...264 Clarus 590 GC User s Guide ...
Страница 279: ...Index ...
Страница 280: ...280 Clarus 590 GC User s Guide ...