Sulphide Half Cell ISE

The EDT directION Sulphide Half Cell ion selective electrode has a solid state Crystalline membrane.

Features:

• Solid State Electrode
• No internal Filling solutions required
• Rugged Robust and Maintenance free
• Waterproof and Submersible
• Fixed or Detachable lead versions
• Compatible will all pH or Ion meters
• Long life and Low Cost

It requires the use of a double junction reference electrode which has its outer chamber filled with the Ionic strength adjustment buffer (ISAB) detailed below. The electrode is designed for the detection and analysis of Sulphide ions in aqueous solutions. It is suitable for use in the laboratory and in on line analysers.

Operation:

Please note that both the ISE and the reference electrode need to be placed in the standards or samples simultaneously and should not be more than around 10cm apart. The side filling cap of the double junction reference electrode should be open during measurements and closed during storage.

The EDT Half Cell ISE can be used immediately, however pre-soaking for 5 minutes in a 100 ppm Sulphide solution along with the double junction reference electrode is recommended.

The ionic strength of the standards and solutions should be kept constant between all standards and samples. This is achieved by the simple addition of an Ionic strength adjustment buffer (ISAB). Sulphide Anti Oxidant buffer is ideal. For low level measurements below around 50 ppm in relatively pure samples no ISAB is needed. Sulphides can be noxious and should be kept in a fume cupboard. Be sure to use SAOB as ISAB.

No temperature correction is possible it is therefore important that all standards and samples should be measured at the same temperature to ensure that temperature effects are eliminated.

Begin calibration from the lowest concentration standard to avoid cross contamination. Calibration should cover the anticipated range of the samples. Rinse tips of both electrodes with de-ionised water between measurements and dab off excess water.

When the response time or slope of your crystalline ISE reduces you can lightly polish the tip with very fine emery paper to refresh.

EDT directION produce a full range of Stock Standards and Ionic Strength Adjustment Buffers (ISABs). This saves valuable time and gives confidence in the quality of your results.

Visit our YouTube Channel for more information about our products.