Barium(II)-PVC Membrane Sensor Based on 4-4′-Methylenediantipyrine as a Neutral Carrier

Abstract

A highly selective and sensitive poly(vinyl chloride) membrane electrode, using 4-4 0 -Methylenediantipyrine as an ionophore, has been prepared and examined as a Ba 2þ -selective electrode. The influence of the anion excluder (sodium tetraphenyl borate, NaTPB) and the effect of the plasticizers dibutyl phthalate (DBP), nitrobenzene (NB), and benzyl acetate (BA) were studied. The best performance was obtained with the sensor having a membrane composition (w=w) of (MAP, 2.0%), (PVC, 30%), (NB, 66%), (NaTPB, 2.0%) with a wide working concentration range of 1.0 Â 10 À6 to 1.0 Â 10 À2 M between the pH values of 3.4 and 10.6. Furthermore, a Nernstian slope of 29.7 AE 0.3 mV= decade of activity was demonstrated with a response time of 15 s. The sensor could be used over a period of 2 months with no potential divergence, revealing a good selectivity for a broad variety of cations including alkali, alkaline earth, heavy and transition metals. Regarding the practical applicability of this sensing device, it was successfully applied for the Ba 2þ ions detection in a lithophone pigment and as an indicator electrode in the potentiometric titration of the under study cations.

Quantitative Analysis of Holmium Ion by a Ho3+ Ion‐Selective Sensor Based on a Symmetric Thio‐Schiff's Base

“…In line with the information of this Table, electrodes reported in the literature by other researchers. [14][15][16][17][18] From the data given in Table 3, the proposed sensor in terms of not only response time, but also selectivity is superior to the previously reported Ho 3＋ ion-selective membrane electrode.…”

“…12 There are some reports on the literature for selective determination of holmium ion by potentiometric electrodes. [13][14][15][16][17][18] In this work, selectivity of N- (Figure 1), which is a thio-Schiff's base was conductometrically studied in acetonitrile. Since TPA showed a selective behavior toward holmium ion, it was applied in construction of a Ho(III) selective PVC membrane sensor.…”

Fabrication of a PVC membrane samarium(III) sensor based on N,N′,N″-tris(4-pyridyl)trimesic amide as a selectophore

“…Then A Pyrex tube (5-mm o.d.) was dipped into the oily mixture for~10 s, to achieve a transparent membrane of 0.3 mm in thickness at the tip [28][29][30][31][32][33][34][35][36][37][38][39][40][41]. The tube were then kept at room temperature for 24 h and filled with an internal solution (1.0 × 10 −3 mol L −1 SmCl 3 ), and finally conditioned for 36 h by soaking in a 1.0 × 10 −2 mol L −1 SmCl 3 solution.…”

PVC-membrane potentiometric sensors based on a recently synthesized Schiff base for Fe(III) ion

“…However very few Fe(III)-selective sensors which offer simplicity, rapidity and reliability as an analytical tool have been reported [8][9][10]. Recently, several highly selective and sensitive PVC-membrane ion selective electrodes (ISEs) for various metal ions have been reported [11][12][13][14][15]. In this study, we were also motivated to investigate the fabrication and characterization of a new ISE based on (DEDIO) (Figure 1) as a suitable ionophore.…”