Potassium Combination Ion Selective Electrode (ISE) - HI4114
The HI4114 is a liquid membrane, potassium combination ion selective electrode (ISE) for the determination of potassium (K ) in solution. The PVC membrane comprised with organic ion exchanger produces a potential change due to the potassium ion exchange between the organic polymer membrane and the sample. The internal sensing elements are housed within a durable polyetherimide (PEI) body. The HI4114 is ideal for a variety of applications in wine, agriculture, and water analysis.
- Liquid membrane sensor
- Skirted cone geometry
- Detection from 0.039 to 39,100 mg/L K
The HI4114 potassium ion selective electrode is a complete potentiometric cell that contains a silver/silver chloride (Ag/AgCl) reference housed within a PEI plastic body with a sodium chloride electrolyte. The internal elements are isolated from the sample by an organic polymer sensing membrane.
Conversion Table for K
moles/L (M) to ppm (mg/L)
ppm (mg/L) to M (moles/L)
2.56 x 10-5
Replaceable Sensing Modules
- Combination liquid membrane ISEs are electrodes that detect free ions in a solution. This type of ISE is designed to incorporate easy replacement of the sensing module.
Durable PEI Body
- The probe body is composed of durable polyetherimide (PEI) plastic.
- The HI4114 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.
Theory of OperationA liquid membrane ion selective electrode develops a voltage due to the ion exchange that occurs between the solution and the polymer membrane that contains organic ion exchange resin. When the ionic strength of the solution is fixed by the addition of ISA, the voltage is proportional to the concentration of free ions in solution.
|Type||polymer membrane; combination|
|Optimum pH Range||1.5 to 12.0|
|Temperature Range||0 to 40°C|
|Cable||1 m coaxial|
|Common Applications||determination of potassium ions in wine, waters, soils and biological samples|