General Recommendation To Lowest Carry-Over - Agilent Technologies G1367A Reference Manual

2
Optimizing Performance

General Recommendation to Lowest Carry-over

• Prime flush pump daily for 3 minutes with appropriate solvent previous to
• Set needle wash in flush port to at least 10 seconds.
• Use previously described injector program
• For samples where needle outside cannot be cleaned sufficiently with water
In case the needle seat has got contaminated and carry-over is significantly
higher than expected, the following procedure can be used to clean the needle
seat:
• Go to MORE INJECTOR and set needle to home position.
• Pipette an appropriate solvent on to the needle seat. The solvent should be
• Clean the needle seat with a tissue and remove all liquid from it.
• RESET the injector.
48
the first run.
carry-over is significantly higher than 0.01 %.
or alcohol use wash vials with an appropriate solvent. Using an injector
program and several wash vials can be used for cleaning.
able to dissolve the contamination. If this is not known use 2 or 3 solvents
of different polarity. Use several milliliters to clean the seat. The liquid
leaves the seat via the drainage for the flush port.
(page 47) as injection mode if
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