Ion Chromatography

Additives (nitrite & nitrate), Contaminants (chloride & sulfate), and Degradation Acids (glycolate, acetate, formate & oxalate)

Definition

Nitrites and nitrates are metal-protecting inhibitors. Chlorides and sulfates are contaminants. Chlorides can come from source water or air leaks. Sulfates can come from source water, combustion gas leaks or residual sulfuric acid cleaner. Both have the potential to form acids. Sulfate can also form scale. Glycolate, acetate, formate and oxalate are a result of the thermal breakdown of ethylene glycol.

Standard Test Method Used

ASTM D5827

Reporting Measurement

ppm (parts per million)

Amount of Sample Needed

5 mL

Test Limitation

IC is an inferential measurement technique. Coolants can contain other components that will co-elute with the desired analytes. Other techniques may be used to identify any issues.