Fabrication of a novel holmium(III) PVC membrane sensor based on 4-chloro-1,2-bis(2-pyridinecarboxamido)benzene as a neutral ionophore

Abstract

This paper introduces the development of an original PVC membrane electrode, based on 4-chloro-1,2-bis(2-pyridinecarboxamido)benzene (CBPB) as a suitable carrier for the Ho 3+ ion. The electrode presents a Nernstian slope of 19.7 ± 0.3 mV per decade for the Ho 3+ ions across a broad working concentration range from 1.0 · 10 -6 to 1.0 · 10 -2 M. The lower detection limit was 8.5 · 10 -7 M in the pH range 2.7-9.8, while the response time was rapid (<15 s). Therefore, this potentiometric sensor displayed good selectivity for a number of cations such as alkali, alkaline earth, transition and heavy metal ions. The practical applicability of the electrode was demonstrated by its use as an indicator electrode in the potentiometric titration of Ho 3+ ions with EDTA and in the determination of F -in mouth wash samples.

Comparative studies of neodymium (III)-selective PVC membrane sensors

“…Thus, a quick, convenient, fast method is required to monitor neodymium in large number of environmental samples. Recently many papers for lanthanide ions have been reported La [12][13][14], Ce [15][16][17][18][19][20][21], Pr [22], Sm [23], Tb [24], Ho [25] and Yb [26] ions.…”

A Silver(i) PVC-Membrane Sensor Based on Synthesized Dilaktam Crown Ether

“…was dipped into the mixture for about 5 s, so that a transparent membrane of about 0.3 mm thickness was formed. [40][41][42][43][44][45][46][47][48][49][50] The tube was then pulled out from the mixture and kept at the room temperature for about 24 h. The tube was then filled with internal filling solution (1.0 × 10 -3 M of AgNO 3 ). The electrode was finally conditioned by soaking in a 1.0 × 10 -3 M AgNO 3 solution for 24 h. A silver/silver chloride wire was used as an internal reference electrode.…”

Fabrication of a Praseodymium(III) PVC-Membrane Sensor Based on N′1,N′2-Bis(2-oxo-1,2-diphenylethylidene) ethanedihydrazide

“…Recently, several studies concerning the selective and sensitive PVCmembrane ion-selective electrodes have been reported for some ions (Zamani, Abedini-Torghabeh, and Ganjali 2006a;Zamani, Rajabzadeh, Ganjali, and Nourozi 2007;Liu et al 2006;Zamani, Rajabzadeh, and Ganjali 2006a, 2007c, 2007dLuo, Chai, and Yuan 2007;Zamani, Ganjali, Norouzi, Adib, and Aceedy 2006;Zhang et al 2007;Zamani, 556 H. A. Zamani et al Ganjali, andAdib 2007a, 2007b;Zamani, Ganjali, Nourozi, and Meghdadi 2007;Behmadi et al 2007;Zamani, Ganjali, and Seifi 2007;Pooyamanesh et al 2007). The aim of this work is fabrication of a highly selective and sensitive praseodymium(III) PVC membrane electrode based on N 01 ,N 02 -bis(2-oxo-1,2-diphenylethylidene)ethanedihydrazide (BEH) as an excellent ionophore for the selective and sensitive potentiometric determination of Pr(III) ion over a wide concentration range (Fig.…”