Fabrication of a new samarium(III) ion-selective electrode based on 3-{[2-oxo-1(2h)-acenaphthylenyliden]amino}-2-thioxo -1,3-thiazolidin-4-one

Abstract

Este trabalho apresenta o desenvolvimento de um eletrôdo de membrana de PVC, que contém 3-{[2-oxo-1(2H)-acenonaftilideno]amino}-2-tioxido-1,3-tiazolidino-4-ona (ATTO), que mostrou ser seletivo para íons Sm 3+. Os dados obtidos mostram uma resposta Nernsteniana com inclinação de 19,3 ± 0,6 mV por década para íons Sm 3+ em uma ampla faixa de concentração , de 1,0 × 10. O limite de detecção encontrado foi (5,5± 0.3) × 10 -7 mol L -1 numa faixa de pH entre 3,5 e 7,5, com tempo de resposta pequeno (~10 s). O sensor potenciométrico mostrou boa seletividade para diferentes cátions, como os alcalinos, alcalinos terrosos e para íons de metais pesados. This paper introduces the development of an original PVC membrane electrode, based on 3-{[2-oxo-1(2H)-acenaphthylenyliden]amino}-2-thioxo-1,3-thiazolidin-4-one (ATTO) which has revealed to be a suitable carrier for Sm 3+ ions. The resulting data illustrated that the electrode shows a Nernstian slope of 19.3 ± 0.6 mV per decade for Sm 3+ ions over a broad working concentration range of 1.0 × 10 -6 to 1.0 × 10 -1 mol L -1 . The lower detection limit was found to be equal to (5.5± 0.3) × 10 -7 mol L -1 in the pH range of 3.5-7.5, and the response time was very short (~10 s). The potentiometric sensor displayed good selectivities for a number of cations such as alkali, alkaline earth, transition and heavy metal ions.

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

“…In this work, the selectivity coefficients were determined with the aid of the matched potential method (MPM). [59][60][61][62][63][64][65][66][67] According to this method, the specified activity (concentration) of the primary ions (A = 5 × 10 −5 M) is added to a reference solution (1.0 × 10 −5 M of AgNO 3 ), and the potential is measured. In a separate experiment, the interfering ions (B = 1 × 10 −5 to 1.0 × 0 −1 M) are successively added to an identical reference solution, until the measured potential matches that obtained before the addition of the primary ions.…”

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

“…The tube was, then, removed from the mixture, kept at room temperature for about 24 h and filled with an internal filling solution (1.0 · 10 -3 M of HoCl 3 ). Finally, the electrode was conditioned by soaking in a 1.0 · 10 -2 M HoCl 3 solution for 36 h [19][20][21][22][23][24][25][26][27][28]. As an internal reference electrode, a silver-silver chloride wire was used.…”