Zn(II)‐Selective Membrane Electrode Based on Tetraazamacrocycle [Bzo₂Me₂Ph₂(16)hexaeneN₄]

Abstract

A PVC membrane electrode using [Bzo 2 Me 2 Ph 2 (16)hexaeneN 4 ] (I) as ionophore, oleic acid as lipophilic additive and o-nitrophenyloctyl ether as plasticizer has been investigated as Zn(II)-selective electrode. The membrane incorporating 34.9% (w/w) PVC, 2.3% I, 4.7% OA and 58.1% o-NPOE gave linear response over the concentration range 2.82 Â 10 À6 À 1.0 Â 10 À1 M with a Nernstian slope of 28.5 AE 0.2 mV/decade of concentration with a detection limit of 2.24 Â 10 À6 M (0.146 ppm) and showed a response time of less than 10 s and could be used in pH range 2.5 -8.5. High selectivity was obtained over a wide variety of metal ions. The proposed electrode was successfully used as an indicator electrode in potentiometric titration of zinc ions with EDTA and for determination of zinc in real samples.

Potentiometric multi-walled carbon nanotube Zn-sensor based on a naphthalocyanine neutral carrier: experimental and theoretical studies

“…27,28 Based on various parameters, the high stability and selectivity of its metal ion complex, its solubility and high ability to extract the metal ion into the paste phase, 2,11,20,29-tetra-tert-butyl-2,3naphthalocyanine was explored as an active material in carbon paste electrode for the fabrication of Zn 2+ selective sensor. Comparison between the proposed electrode and the reported Zn 2+ sensors based on macrocyclic ionophores [27][28][29][30][31][32][33][34][35] showed that the developed sensor has superiority over the reported electrodes in terms of low detection limit and fast response time (Table 1).…”

New solid-state membrane and coated wire potentiometric sensors for the determination of Zn(II) ions based on nanoparticles

“…As an alternative to these approaches, ion-selective membrane sensors are comparatively affordable, fast, and quite simple. Numerous PVC-based membrane sensors using different ionophores for the determination of Zn 2+ ions have been described [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Solid-contact zinc(II) PVC membrane sensors have also been reported [29,30].…”

Acyclic Arylamine-Based Ionophores as Potentiometric Sensors for Zn2+ and Ni2+ Ions

“…A number of ions selective membranes (ISMs) have been reported with various compounds for the detection of both zinc and nickel. This includes [Bzo2Me2Ph2 (16)hexaeneN4] [36], PME-6,7:14,15-Bzo2-10,11-(4-methylbenzene)- [15]-6,8,12,14-tetraene-9,12-N2-1,5-O2 [37], Dibenzo-24-crown-8 [26], 3-[(2-Furylmethylene)amino]-2-thioxo-1,3-thiazolidin-4-one [38], N,N-Bis(acetylacetone)ethylene diamine [25] for zinc ions and porphyrins, crown ethers, cyclams, amines, and Schiff bases-based molecules for nickel ions [33,34,[39][40][41][42][43].…”