Does Hach sell an Ion Selective Electrode (ISE) that can be used for direct measurement of Cyanide?

Document ID

Document ID TE6217

Version

Version 4.0

Status

Status Published

Published Date

Published Date 07/03/2018
Question
Does Hach sell an Ion Selective Electrode (ISE) that can be used for direct measurement of Cyanide?
Summary
Cyanide ISE.
Answer
The Radiometer Analytical ISE25CN-9 Cyanide Ion Selective Electrode (ISE) (half-cell, screw cap) (Catalog number/Order code E41M005) is available. However, This probe is commonly used in inflection point titrations rather than direct measurement. Standards for calibration as well as Ionic Strength Adjuster (ISA) are not available and would need to be sourced elsewhere or more commonly prepared by the end user. The guidelines for sample preparation and preparation of ISA sections of the manual outline information for use as direct measurement ISE. ( Is there a manual available for the Radiometer Analytical ISE25CN-9 Cyanide Ion Selective Electrode (ISE)?)

This probe is a screw cap electrode, so the cable would need to be ordered separately. CL114 Electrode Cable: S7 to BNC (1 meter cable) (Catalog number/Order code A94L114) is recommended as most meters that this electrode would be used with use BNC connectors.

This probe is a half cell so a separate reference electrode would also be needed as well. Radiometer Analytical REF201 Red Rod Reference Electrode (banana plug) (Catalog number/Order code E21M009) is recommended in many cases, but would not be suitable in sample that would react with Potassium or Chloride as it uses a Saturated KCl reference system. For these types of samples a double junction reference electrode like the Radiometer Analytical REF251 Red Rod Reference Electrode (double junction, banana plug) (Catalog number/Order code E21M001) would be required. 

With these recommendations, they would of course require a meter as well with a BNC connection that is capable of running ISE with a separate reference using a banana plug. The sensION+ MM 374 GLP 2 channel Benchtop Meter for pH, ORP, ISE and Conductivity (Catalog number/Order code LPV4110.97.0002) would meet these requirements.