IC OQ - ED Noise and Drift Test Failing

Issue

As part of an IC OQ, the Electrocehmical Detector (ED) Noise and/or Drift test is failing.

First Confirm:

Instrument Method is correct (Waveform, Flow Rate, Temperatures, Data Collection Rate)
Adequate time for equilibration was given, ED can require 12 hrs to fully equilibrate
Tubing is correct and not overly restriciting or leaking (System Pressure is ~1500 psi for Analytical Pumps)
The 2M NaOH system rinse has been performed to clean the system
Quality of Eluent (If manually prepared: Water degassed prior to eluent prep, 50mM prepared from 50% w/w NaOH, preferably a new unopened bottle)

To Help with ED Noise:

Re-Run the 2M NaOH system rinse (30 mins), followed by DI Water rinse (30 mins)
Prepare new Eluent (if applicable)
Add additional Yellow capillary between restrictor and guard column to increase system pressure appropriately
Reconnect test cell cable to amperometry cell connection on SP board
Replace DWE, reference electrode or electrochemical cell

To Help With ED Drift:

The ED is highliy sensitive to laboratory HVAC conditions, and requires the system to be clean and properly equilibrated.

See ED User Compendium for more details: 065340 - Rev - 02 ED User Compendium

The following causes contribute to ED Noise and Drift: