Chromatographic Symptoms 3
Troubleshooting 27
Peak Areas Not Repeatable
Check the ALS syringe operation. (See the Troubleshooting
section of the 7683B Automatic Liquid Sampler Installation,
Operation and Maintenance manual and 7693A Automatic
Liquid Sampler Installation, Operation and Maintenance.)
• Replace the syringe.
• Check for leaks in the inlet, liner (as applicable), and
column connection. (See “Checking for Leaks”.)
• Check sample level in vials.
• Run replicates of known standards to verify the problem.
• Consider if this is the first run. (Has the GC stabilized?)
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