HI4011

Description

The HI4011 is a solid state, half-cell ion selective electrode (ISE) for the determination of iodide (I-) in solution. The silver iodide sensing pellet produces a potential change due to the iodide ion exchange between the inorganic pellet membrane and the sample. The internal sensing elements are housed within a durable epoxy body. The HI4011 is ideal for a variety of applications in food production and environmental monitoring.

• Detection from 0.01 to 127,000 mg/L I-
• For use with HI5315 reference half-cell
• Solid state sensor

The HI4011 iodide selective electrode is a potentiometric half-cell sensor housed within an epoxy body. The internal elements are isolated from the sample by a compressed silver iodide sensing membrane. This solid state sensor requires a separate reference electrode to complete the measurement system.

Hanna’s solid state half-cell ISEs are designed for use with the HI5315 reference half-cell. The reference half-cell features a cone style junction. The skirted cone geometry of the reference 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 HI4011 to measure iodide accurately, it is important that the ionic strength of the standards and sample be adjusted to a high and constant value with the halide ionic strength adjuster (ISA) solution. The halide ISA ensures that the activity coefficient is constant so the concentration of free iodide ions can be measured. Measuring all solutions with a constant ionic strength reduces the margin of error between measurements. The HI4011 iodide solid state ISE can measure from 0.1µM (0.01 mg/L) to1M (127,000 mg/L).

Conversion Table for I^–

	Multiply
moles/L (M) to ppm (mg/L) :	1.269 x 10⁵
ppm (mg/L) to M (moles/L) :	7.88 x 10^-6

Features at-a-glance
BNC Connection
• The HI4011 has a universal BNC connector for easy connection to any benchtop meter with a female BNC probe input.

Durable Epoxy Body
• The probe body of the iodide half-cell is composed of durable epoxy resin.

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 HI4011 iodide half-cell by a fixed sensing module for ease of use.

SPECIFICATIONS

Type :	solid state; half-cell
Measurement Range :	Iodide (I^–) 1M to 1•10^-7M, 127,000 to 0.01 mg/L (ppm)
Optimum pH Range :	pH 2 to 13
Temperature Range :	0 to 80 °C
Approximate Slope :	-56 mV
Diameter :	12 mm
Overall Length :	120 mm
Body Material :	epoxy
Cable :	coaxial; 1 m (3.3’)
Connection :	BNC
Warranty :	6 months