A PRACTICAL APPROACH TO ION SELECTIVE ELECTRODES PERFORMANCE IN STATIC AND DYNAMIC CONDITIONS |
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| O. Postolache, P. Girão, Helena Ramos, M. Pereira |
- Abstract:
- The paper presents a practical approach to ion selective electrodes (ISE). The behaviour of Pb+2 ISE (ELIT8231) and Cd+2 ISE (ELIT8241) for pure (only Cd+2 or Pb+2) and mixed solutions (Cd+2 and Pb+2) in static and dynamic conditions is studied. The pH variation of ISE test solution is considered in order to perform the pH correction of the ISE potentiometric selectivity coefficient determined under static conditions using a neural network processing structure. The dynamic test is performed in order to evaluate sensor’s transient response and time constant as well as ion interference and pH influence on sensor’s output. The experimental set-up is expressed by a multisensor virtual measurement system that acquires the voltage of the sensor channels, controls the ISE dynamic test and performs the data processing using a software implemented in LabVIEW.
- Keywords:
- ion selective electrodes, virtual instrument, neural processing
- Download:
- PWC-2003-TC4-042.pdf
- DOI:
- -
- Event details
- Event name:
- XVII IMEKO World Congress
- Title:
Metrology in the 3rd Millennium
- Place:
- Dubrovnik, CROATIA
- Time:
- 22 June 2003 - 28 June 2003