Lead/Sulfate Half-Cell Ion Selective Electrode (ISE) - HI4012
The HI4012 is a solid state, half-cell ion selective electrode (ISE) for the determination of lead (Pb2 ) in solution and indicator for sulfate in titrations. The lead sulfide sensing pellet produces a potential change due to the ion exchange between the inorganic pellet membrane and the sample. The internal sensing elements are housed within a durable epoxy body. The HI4012 is ideal for a variety of applications in the plating industry and environmental monitoring.
- Solid state sensor
- Detection from 0.21 to 20,700 mg/L Pb2
- For use with HI5315 reference half-cell
moles/L (M) to ppm (mg/L)
2.072 x 105
ppm (mg/L) to M (moles/L)
4.826 x 10-6
Fixed Sensing Modules
- Solid state half-cell ISEs are electrodes that detect free ions in a solution. The highly insoluble, compressed sensing pellet is attached to the HI4012 lead/sulfate half-cell by a fixed sensing module for ease of use.
Durable Epoxy Body
- The probe body of the lead/sulfate half-cell ISE is composed of durable epoxy resin.
- The HI4012 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; half cell|
|Measurement Range||0.1M to 1•10-6M 20700 to 0.21 mg/L (ppm)|
|Optimum pH Range||4 to 7|
|Temperature Range||0 to 80°C|
|Cable||1 m coaxial|
|Common Applications||determination of lead ions in plating baths and as an indicator for titrations|