Cation Conductivity Analyzers

Strong acid cation exchangers have an affinity for cations over hydrogen and will exchange hydrogen for them as water flows through the vessel. This will eliminate the conductivity from the added alkalinization chemical. Other cations are transformed into their respective acids. The sensitivity of the measurement will be increased by a factor of 3 to 3.5. This makes it easier to detect small amounts of contaminating ions. Carbon dioxide will influence the measurement.

Degassed Acid Cation Conductivity (DCACE)

Carbon dioxide via air in-leakage or thermal decomposition of organic amines increases the acid conductivity. CO2 is not as corrosive as contaminants such as chloride and sulfate. Since acid (cation) conductivity is the primary means of detecting contaminants such as chloride and sulfate, it is advantageous to remove as much CO 2 as possible from the sample to determine if the elevated acid (cation) conductivity is due CO 2 or more corrosive ions such as chloride or sulfate.

Conductivity after cation exchange (CACE)

Conductivity after cation exchange (CACE) is the most important parameter in order to monitor the purity of a water steam cycle. In all water steam cycles, but especially ones with high pH regimes (pH = 9.8), the benefits of the AMI CACE’s are of highest importance.

Conventional cation resin columns are exhausted fast and frequent resin replacement or regeneration is necessary, driving high operating costs. Whereas conventional CACE monitoring relies on costly resin columns to undertake cation exchange, Swan’s AMI CACE online monitor is equipped with a propietory, cost saving electrodeionization module: