Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1246051 | Talanta | 2007 | 5 Pages |
Abstract
Advantages of using sequential injection analysis lab-on-valve (SIA-LOV) in potentiometric measurements are studied with Ca2+ sensitive solid-contact ion-selective electrodes (SC-ISE) and pH electrode based on polyaniline (PANI). Experiments show that Ca2+-SC-ISE requires a stopped flow mode to be used in order to get longer equilibration time. On the other hand, PANI based pH electrode gives better results under flow conditions. SIA-LOV was found to be a flexible solution handling system for potentiometric measurements. The technique gives a possibility to fine-tune the calibration range or even recondition the electrode before every measurement without losing in linear range of calibration.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Timo Kikas, Ari Ivaska,