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Cadmium Combination Ion-Selective Electrode (ISE) – HI4103

The HI4103 is a solid state, combination ion selective electrode (ISE) for the determination of cadmium (Cd2+) in solution. The mixed cadmium sulfide/silver sulfide sensing pellet produces a potential change due to the cadmium ion exchange between the inorganic pellet membrane and the sample. The internal sensing elements are housed within a durable polyetherimide (PEI) body.

The HI4103 is ideal for a variety of applications in electroplating, battery construction, and in the laboratory.

  • Solid state sensor
  • Skirted cone geometry
  • Detection from 0.01 to 11, 200 mg/L Cd2+

AED

Estimated delivery: 20 - 21 May

SKU:HI4103

The HI4103 cadmium 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 potassium nitrate electrolyte. The internal elements are isolated from the sample by a compressed cadmium sulfide/silver sulfide sensing membrane.

Hanna’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.

For the HI4103 to measure cadmium accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the HI4000-00 ionic strength adjuster (ISA) solution. The ISA ensures that the activity coefficient is constant so the concentration of free cadmium ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI4103 cadmium solid state ISE can measure from 0.1µM (0.01 mg/L) to 0.1M (11, 200 mg/L).

Conversion Table for Cd2+

Multiply

moles/L (M) to ppm (mg/L)

1.124 x 105

ppm (mg/L) to M (moles/L)

8.896 x 10-6

Features at-a-glance

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.

BNC Connection – The HI4103 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.

Theory of Operation

A 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.

Specifications

SKU HI4103
Name Cadmium Combination Ion-Selective Electrode (ISE) – HI4103
Description combination
Measurement Range cadmium (Cd2+) 0.1M to 1 10-7M, 11,200 to 0.01 mg/L (ppm)
Temperature Range 0 to 80 °C
Body Material PEI
Optimum pH Range pH 2 to 12.5
Body Length/Overall Length 120 mm
Outer Diameter 12 mm
Cable coaxial; 1 m (3.3’)
Connector Type BNC
Notes Approximate Slope +28 mV

Manuals

Cadmium Combination Ion-Selective Electrode (ISE) – HI4103

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