Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1244565 | Talanta | 2008 | 5 Pages |
Abstract
In this work, nickel hexacyanoferrate-modified electrode was developed to determine potassium ions in biodiesel by potentiometry. The modified electrodes exhibit a linear response to potassium ions in the concentration range of 4.0 × 10−5 to 1.0 × 10−2 mol L−1, with a detection limit of 1.9 × 10−5 mol L−1, and a near-Nernstian slope (53–55 mV per decade) at 25 °C. The method developed in this work was compared with flame photometry and the potassium concentration found in biodiesel showed that the modified electrode method gives results similar to those obtained by flame photometry.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Michelle de Souza Castilho, Nelson Ramos Stradiotto,