Suggestion for deep learning approach to solve the interference effect of ammonium ion on potassium ion-selective electrode

• Published in: 한국표면공학회지 Vol. 55; no. 3; pp. 156 - 163
• Main Authors: Kim, Min-Yeong, Heo, Jae-Yeong, Oh, Eun Hun, Lee, Joo-Yul, Lee, Kyu Hwan
• Format: Journal Article
• Language: Korean
• Published: 2022
• Subjects: deep learning; NH_4^+$ interference behavior; K^+$ sensor; K ion detection; ion-selective electrode
• ISSN: 1225-8024

An ammonium ion with a size and charge similar to that of potassium can bind to valinomycin, which is used as an ion carrier for potassium, and cause a meaningful interference effect on the detection of potassium ions. Currently, there are few ion sensors that correct the interference effect of ammonium ions, and there are few studies that specifically suggest the mechanism of the interference effect. By fabricating a SPCE-based potassium ion-selective electrode, the electromotive force was measured in the concentration range of potassium in the nutrient solution, and the linear range was measured to be 10-5 to 10-2 M, and the detection limit was 10-5.19 M. And the interference phenomenon of the potassium sensor was investigated in the concentration range of ammonium ions present in the nutrient solution. Therefore, a data-based analysis strategy using deep learning was presented as a method to minimize the interference effect.