Highly Selective Thiocyanate Electrode Based on Bis-[N-(2-hydroxyethyl)salicylaldimino]copper(II) Complex as a Neutral Carrier

A New Composition for Co(II)-porphyrin-based Membranes Used in Thiocyanate-selective Electrodes

“…The selectivity coefficients of the electrode having the optimal membrane composition are comparatively presented with the corresponding values of the thiocyanate-selective electrodes having the ionophores 5,10,15,20-tetratolylporhine manganese(III) chloride [5], 5,10,15,20-tetraphenyl-porphine rhodium(III) chloride [10] or bis-[N-(2-hydroxyethyl)salicylaldimino]copper(II) [11], as can be seen in Table 1.…”

“…A lot of thiocyanate sensors based on different ionophores were reported for the selective determination of this compound from biological samples (saliva and urine), for example: 5,10,15,20-tetratolylporhine manganese(III) chloride [5], 5,10,15,20-tetraphenylporphine rhodium(III) chloride [10] or bis-[N-(2-hydroxyethyl)salicylaldimino]copper(II) [11]. We have chosen the above mentioned thiocyanate-selective electrodes, because the selectivity coefficients were determined by separate solution method (SSM) [12], which was also used in the present study.…”

A Novel Poly(vinyl chloride) Matrix Membrane Sensor for Batch and Flow-Injection Determinations of Thiocyanate, Cyanide and Some Metal Ions

“…Polymer membrane sensors incorporating lipophilic organo-metallic compounds or metal-ligand complexes show potentiometric selectivity patterns that deviate significantly from the Hofmeister sequence. [14][15][16][17][18] Various anion carriers have been reported for the development of thiocyanate membrane sensors, including organo silver, 19 nickel, 20 copper, 21 mercury, 22 zinc, 23 cadmium, 24 manganese, 25 and palladium 26 complexes. Metal porphyrin, 27 metallophthalocyanine, 28 metal azamacrocyclic, 29 and calixarene 30 derivatives have also been used.…”

Application of surfactant modified zeolite membrane electrode towards potentiometric determination of perchlorate

“…The development of selective and sensitive liquid polymeric membrane electrodes for anions is of increasing interest for clinical, industrial, as well as environmental applications. The traditional anion-selective membrane electrodes based on ion exchangers always display a Hofmeister selectivity sequence, as follows; perchlorate > thiocyanate > iodide % salicylate > nitrate > bromide > nitrite > chloride > sulfate, in which a membrane selectivity is controlled by the free energy of hydration of the ions involved, and recent studies have been more concerning on the electrodes using plasticized poly vinyl chloride (PVC) membranes incorporating different complexes as a carrier [18].…”