Automatic Liquid Sampler and Injector
Pre-run checklist
Released: March 2004 6850 Series II GC User Information page 217 of 256
Automatic Liquid Sampler and
Injector
Refer to the instructions below to use and maintain your 6850 Automatic Liquid
Sampler (ALS) or Automatic Injector, if installed.
Pre-run checklist
Use this checklist to make sure the sampler is ready before you begin.
❐ Sample vials are half full
❐ Cap is centered, no wrinkles, septum is flat
❐ Sample vial positions match the run parameters
❐ 4.5 mL of fresh solvent in each solvent bottle
❐ Waste bottles are empty
❐ There is enough solvent or waste capacity for your sample vials
❐ Syringe is new or clean
❐ Syringe design and size are correct
❐ Plunger is secure in plunger carrier loop
❐ Needle is aligned with septum retainer nut
❐ Syringe is rinsed with solvent
❐ GC inlet liner is clean and deactivated
❐ GC inlet liner or insert is correct type for injection technique
❐ GC inlet septum type is correct
❐ GC inlet septum is less than 200 injections old
❐ Correct septum nut is installed in GC inlet
Running a sample
When running a sample, keep your hands away from the syringe needle. The
needle is sharp and may contain hazardous chemicals.
To operate your automatic liquid sampler or injector:
1. Install a clean syringe. See “Installing a syringe” on page 222.
2. Fill the sample vials. See “Preparing sample vials” on page 218
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