Novel potentiometric copper (II) selective membrane sensors based on cyclic tetrapeptide derivatives as neutral ionophores

Electroanalytical and naked eye determination of Cu2+ ion in various environmental samples using 5-amino-1,3,4-thiadiazole-2-thiol based Schiff bases

“…Potentiometric sensors based on ion-selective electrodes are especially suited for such determination because they offer advantages such as selectivity, sensitivity, good precision, simplicity and low cost. A literature survey revealed that the sensors developed for Cu 2+ ion make use of Schiff's bases [17][18][19], crown ethers [20][21], macrocycles [22], porphyrins [23] and variety of other ligands [24][25][26][27] as sensor materials. Some of these are suffering with high detection limit, low working concentration, low pH range and low selectivity.…”

Potentiometric detection and removal of copper using porphyrins

“…This is the reason why a lot of copper-selective sensors based on different ionophores were reported. Several organic compounds, such as: 1-(2-hydroxybenzylidene) thiosemicarbazide [7], Schiff bases [8,9], 2-mercaptobenzoxazole [10], bezo-substituted macrocyclic diamide [11], 6-methyl-4-(1-phenylmethylidene)amino-3-thioxo-1,2,4-triazin-5-one [12], porphyrin derivatives [13], cyclic tetrapeptide derivatives [14], 7-hydroxy-3-(2-methyl-2,3-dihydrobenzo[d]thiazol-2-yl)-2H-chromen-2-one [15], tetraazacyclotetradecane derivative [16], dimethyl 4,4’-( o -phenylene)bis(3-thioallophanate) [17], succinimide derivative [18], polyindole [19] were tested as ionophores.…”

Modified carbon paste electrodes for Cu(II) determination

“…Urgent need for selective potentiometric determination of trace amounts of Cu 2+ ion lead to application of various coordination compounds as ionophore for the construction of copper selective electrodes (ISEs) [17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Due to their ease of preparation, simple operation, fast response, reasonable selectivity, and wide linear working concentration ranges, the ion selective electrode is an attractive alternative method for the determination of organic and inorganic species [31].…”

“…The most selective interaction trend for the preparation of copper selective electrodes is based on the application of chemical recognition elements (organic or inorganic hydrophobic chelating agent) with selective tendency for binding of Cu 2+ ion [21][22][23][24][25][26][27][28][32][33][34][35]. Most of these previously reported electrodes have their own advantage and disadvantages.…”