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What parameters are hidden behind "Feedwater Conductivity Equivalent", and what are they needed for?

In addition to conductivity, the CO2 content and the SiO2 content in the feedwater must also be taken into account. These three parameters are added together to form the "Feedwater Conductivity Equivalent" and used to design an EDI system.

[GMP Compliance Adviser, Chapter 5.B]

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