Iodide Combination Ion Selective Electrode (ISE) - HI4111
- Solid state sensor
- Skirted cone geometry
- Detection from 0.01 to 127,000 mg/L I-
The HI4111 iodide selective electrode is a complete potentiometric cell that contains a silver/silver chloride (Ag/AgCl) reference housed within a PEI plastic body with a potassium nitrate electrolyte. The internal elements are isolated from the sample by a compressed silver iodide sensing membraHanna’s solid-state combination ISEs are designed with a cone style junction. The skirted cone geometry of the sensor forms the liquid junction with the test solution at the tip of the junction cone, producing a highly stable reference potential and consistent flow rates of electrolyte into the solution. A simple press of the top portion of the ISE makes it easy to empty the electrolyte fill solution and replace when necessary.
Conversion Table for I-
moles/L (M) to ppm (mg/L)
ppm (mg/L) to M (moles/L)
7.88 x 10-6
Fixed Sensing Modules
- Combination solid-state ISEs are electrodes that detect free ions in a solution. The highly insoluble, compressed sensing pellet is attached to the electrode by a fixed sensing module for ease of use.
Durable PEI Body
- The probe body is composed of durable polyetherimide (PEI) plastic.
- The HI4111 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.
Theory of OperationA solid-state sensor electrode develops a voltage due to the ion exchange that occurs between the solution and the inorganic membrane. An equilibrium occurs due to the highly limited solubility of the membrane material in the sample. 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||solid state; combination|
|Optimum pH Range||2 to 13|
|Temperature Range||0 to 80°C|
|Cable||1 m coaxial|
|Common Applications||determination of free iodide ions in emulsified food samples (iodized table salt), plants and for titration|