TY - JOUR

T1 - Designing new sulfate ionophores for potentiometric membrane sensors: Selectivity assessment and practical application

AU - Iurgenson, N.

AU - Vladimirova, N.

AU - Polukeev, V.

AU - Mikhelson, K.

AU - Kirsanov, D.

N1 - Export Date: 5 October 2024 CODEN: SABCE Адрес для корреспонденции: Kirsanov, D.; ITMO UniversityRussian Federation; эл. почта: d.kirsanov@gmail.com

PY - 2024/10

Y1 - 2024/10

N2 - Developing potentiometric chemical sensors for sulfate determination is a rather challenging task due to a considerable hydrophilicity of this anion and its poor affinity to lipophilic plasticized polymeric membranes – one of the most popular sensor membrane materials nowadays. Not too many research works were devoted to this problem in the last years. Here we report on the successful development of several novel sulfate ionophores based on the synthetic modification of the commercially available sulfate ionophore I. The newly developed sensors outperform commercial analogue in terms of elelctrochemical sensitivity and selectivity. We have highlighted certain problems with numerical selectivity assessment in case when primary and interfering ions have different charges. The counterintuitive results yielded by conventional selectivity quantification methods implies the relevance of using alternative approach – visualizing sensor response curves towards primary ion in the presence of interfering ions. Novel sulfate sensors were applied for direct potentiometric measurements of sulfate content in river water samples demonstrating real applicability of the developed sensor membranes. © 2024 Elsevier B.V.

AB - Developing potentiometric chemical sensors for sulfate determination is a rather challenging task due to a considerable hydrophilicity of this anion and its poor affinity to lipophilic plasticized polymeric membranes – one of the most popular sensor membrane materials nowadays. Not too many research works were devoted to this problem in the last years. Here we report on the successful development of several novel sulfate ionophores based on the synthetic modification of the commercially available sulfate ionophore I. The newly developed sensors outperform commercial analogue in terms of elelctrochemical sensitivity and selectivity. We have highlighted certain problems with numerical selectivity assessment in case when primary and interfering ions have different charges. The counterintuitive results yielded by conventional selectivity quantification methods implies the relevance of using alternative approach – visualizing sensor response curves towards primary ion in the presence of interfering ions. Novel sulfate sensors were applied for direct potentiometric measurements of sulfate content in river water samples demonstrating real applicability of the developed sensor membranes. © 2024 Elsevier B.V.

KW - Ion-selective sensors

KW - Potentiometric sensors

KW - Selectivity

KW - Sulfate

KW - Sulfate ionophore

KW - Anionic polymerization

KW - Ion selective membranes

KW - Ionophores

KW - Potentiometers (electric measuring instruments)

KW - Potentiometers (resistors)

KW - Interfering ions

KW - Ion selective sensors

KW - Membrane sensors

KW - Potentiometrics

KW - Primary ions

KW - Sensors membranes

KW - Sulphate ionophore

KW - Sulphates

KW - Nafion membranes

UR - https://www.mendeley.com/catalogue/f0ff0616-ac1d-30f0-adcf-df60c2b3f82b/

U2 - 10.1016/j.snb.2024.136663

DO - 10.1016/j.snb.2024.136663

M3 - статья

VL - 422

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

M1 - 136663

ER -