Tests For: Potassium in Natural and Treated Waters
Tests Range: : 0–12 mg/L
Reagent Chemistry Used: Tetraphenylboron
Method Detection Limit*: 0.3 mg/L
Limit of Quantification**: 0.8 mg/L
Potassium is an abundant natural element. However, in freshwater potassium levels are normally low. Higher levels can be observed in brackish waters. The guide level prescribed for drinking water supplies under the EEC Regulations is 10 mg/L.
The Palintest Potassium test is based on a single tablet reagent containing sodium tetraphenylboron. Potassium salts react with sodium tetraphenyl-boron to form an insoluble white complex. At the potassium levels encountered in the test, this is observed as a turbidity in the test sample. The degree of turbidity is proportional to the potassium concentration and is measured using a Palintest Photometer.