Product Overview

HI4107 is a solid-state combination ion-selective electrode (ISE) for the determination of chloride (Cl-) in solutions. The silver chloride sensing pellet generates a potential change due to the chloride ion exchange between the inorganic pellet membrane and the sample. The internal sensing element is housed within a durable polyetherimide (PEI) body.

• HI4107 is ideal for a variety of applications in food and beverage, agriculture, and water treatment.

• Solid-state sensor

• Tapered cone geometry

• Detection from 1.8 to 35500 mg/L Cl-

• The HI4107 chloride ion-selective electrode is a complete potentiometric cell that contains a silver/silver chloride (Ag/AgCl) reference located within a PEI plastic body with potassium nitrate electrolyte. The internal element is isolated from the sample by a compressed silver chloride sensing membrane.

• Hanna's solid-state combination ISE features a conical connection design. The sensor's skirt cone geometry forms a liquid junction with the test solution at the tip of the connection cone, producing a highly stable reference potential and a consistent flow rate of electrolyte into the solution. A simple press on the top of the ISE makes it easy to empty the electrolyte fill solution and replace it when necessary.

• For the HI4107 to accurately measure chloride, it is important to adjust the ionic strength of both standards and samples to a high and constant value using a halide ionic strength adjuster (ISA) solution. The halide ISA ensures that the activity coefficient is constant, so the concentration of free chloride ions can be measured. Measuring all solutions at a constant ionic strength reduces errors between measurements. The HI4107 chloride solid-state ISE has a measuring range of 50µM (1.8 mg/L) to 1M (35500 mg/L).

• Conversion table for Cl-

• Multiply

• moles/L (M) to ppm (mg/L)

• 3.500 x 104

• ppm (mg/L) to M (moles/L)

• 2.857 x 10-5

• Features at a glance

• Fixed sensing module - The combination solid-state ISE is an electrode for detecting free ions in solution. The highly insoluble compressed sensing pellet is attached to the electrode via a fixed sensing module for ease of use.

• Durable PEI body - The probe body is made of durable polyetherimide (PEI) plastic.

• BNC connection - The HI4107 has a universal BNC connector that easily connects to any benchtop meter with a female BNC probe input.

• Theory of operation

• Solid-state sensor electrodes generate a voltage due to the ion exchange that occurs between the solution and the inorganic membrane. Equilibrium occurs because the membrane material has very limited solubility in the sample. When the ionic strength of the solution is fixed by adding ISA, the voltage is proportional to the concentration of free ions in the solution.