The EDT direction Ammonia combination ISE is a traditional pH glass sensor with a refillable membrane cap.
This electrode does not have the solid state advantage of the Ammonium ISE 3051 but is able to detect dissolved Ammonia down to around 50ppb. For successful operation NaOH ISAB should be added to the samples and standards to ensure all the Ammonium is converted to NH3. The analysis is best done in 100ml conical flasks to reduce the loss of NH3 gas.
In principle the Ammonia penetrates the membrane and causes a change in the pH of the internal solution locally at the interface. This pH change is directly proportianal to NH3 concentration. Each EDT directION Combination ISE has a 1 metre cable and a BNC connector (other connectors available on request) allowing use on all types of pH/ION meter including laboratory bench and research models.
For direct concentration reading and absolute simplicity the EDT DR359TX pH/ION meter is the perfect instrument for these ISEs.
EDT are a UK based manufacturer and produce ISEs for many prominent companies in the water testing sector. As a result our ISEs are very competitively priced and come complete with technical support provided from our vast library of applications and our in house electrochemistry technicians.
For optimum results use EDT direction standards and Ionic Strength Adjustment Buffers ( ISABs).
Click here to see a simple calibration procedure or learn more about the principles of ISE measurement
|Combination ISE Range brochure.pdf File Size 1.59MB Downloaded: 519|
|Ammonia ISE Brochure 3302.pdf File Size 1.65MB Downloaded: 787|
|Ammonia 3302 Manual.pdf File Size 1.42MB Downloaded: 545|
|Body Type||Polymer body with replaceable membrane caps.|
|Endpoint time||Typically 10-60 seconds|
|Potential Drift||2mV per Day|
|Reference Type||Single Junction Ag/AgCl|
|Resistance at 25 Deg C||< 5 MOhm|
|Temperature range||5-50 Degrees C|
Ammonia Combination ISE
- Brand: Made in the UK for EDT
- Product Code: 3302
- Availability: In Stock