Collect. Czech. Chem. Commun. 2010, 75, 563-575
Published online 2010-05-17 12:36:37

Novel palladium(II) selective membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol

Moslem Mohammadia,*, Mehdi Khodadadianb and Mohammad K. Rofoueia

a Faculty of Chemistry, Tarbiat Moallem University, 31979-37551 Tehran, Iran
b Faculty of Chemistry, Razi University, 6714967346 Kermanshah, Iran


A plasticized poly(vinyl chloride) membrane electrode based on 4-[(5-mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol (L) for highly selective determination of palladium(II) (in PdCl42– form) is developed. The electrode showed a good Nernstian response (29.6 ± 0.4 mV per decade) over a wide concentration range (3.1 × 10–7 to 1.0 × 10–2 mol l–1). The limit of detection was 1.5 × 10–7 mol l–1. The electrode has a response time of about 20 s, and it can be used for at least 2 months without observing any considerable deviation from Nernstian response. The proposed electrode could be used in the pH range of 2.5–5.5. The practical utility of the electrode has been demonstrated by its use for the estimation of palladium content in aqueous samples.

Keywords: Palladium(II); Ion selective electrodes; PVC membrane; Potentiometry; 4-[(5-Mercapto-1,3,4-thiadiazol-2-ylimino)methyl]benzene-1,3-diol; Electrochemistry; Electroanalysis.

References: 43 live references.