Coated-wire ion-selective electrode for the determination of gold(III)

Chromium(III)-selective electrode based on a macrocyclic compound

“…Only a few electrodes have been reported, such as an Au(iii)-selective electrode based on the membrane of tetraphenylarsonium tetrachloroaurate immobilized in PVC, which was employed for the determination of gold in minerals. 2 Ortuno and co-workers 3 used an Au(iii)selective electrode based on a mixture of 1,2,4,6-tetraphenylpyridinium tetrachloroaurate, dibutyl phthalate and poly-(vinyl chloride) (PVC) for the determination of gold in Ag-Pd-Au alloys. A coated graphite-epoxy ion-selective electrode for Bi(iii) based on the ion pair between the [Bi(EDTA)] anion and tricaprylmethylammonium cation (Aliquat 3365) incorporated on a PVC matrix was developed by Teixeira and co-workers.…”

Coated wire chromium(III) ion-selective electrode based on azamacrocycles

“…Numerous types of ion-selective electrodes (ISEs) for alkali and alkaline earth metal ions based on crown ethers [2,3,4] have been prepared and studied. In contrast, only a few ionselective electrodes for trivalent ions, namely, Au(III) [5], Bi(III) [6], Al(III) [7], Cr(III) [7,8], Ce(III) [9], and La (III) [10], have been reported. Owing to the well-known fact that nitrogen-and sulfur-containing macrocycles show increased affinity towards transition metal ions than their oxygen-containing analogues [11], coated wire ionselective electrodes (CWISEs) for Ag(I) ISE based on cyclam [12] and Cu(II) ISE based on dibenzodiaza 15C4 [13] have been fabricated.…”

Chromium(III) Ion Selective Electrode Based on Oxalic Acid Bis(Cyclohexylidene Hydrazide)

“…A literature survey revealed that among the reported ISEs base on PVC membrane very little was published on trivalent ions, e.g., Au(III) [2,3], Bi(III) [4], Al (III) [5 ± 8] and Cr(III) [9 ± 16]. The reported chromium selective electrodes are based on Aliquate 336 S À Cr(SCN) 4 À ion pair [9], 8-quinoline-dithiocarboxilate [10], chromium dithizonate [11], (2,4,9,11-tetraphenyl-1,5,8,12-tetraazacyclotetradeca-1,4,8,11-tetraene dihydrogen perchlorate) [12], macrocyclic compound [13], 4-methylaminazobenzene [14], glyoxal bis (2-hydroxyanil) [15] and 2,3,8,9-tetraphenyl-1,4,7,10-tetraazacyclododeca-1,3,7aene [16].…”