Is your conductivity instrument adequately cleaned and giving accurate results? 

The 2.77 EC solution is used as a reference or checking solution to ensure you have adequately cleaned the EC/CF probe.

To ensure solutions remain accurate:

• Avoid cross-contamination
• Decanter into a smaller plastic cup
• Discard sample after use
• Store in a cool dark place
• Store with lid secured tightly
• Keep out of reach of children

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