Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (55권3호 156-163)

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


Min-Yeong Kima, Jae-Yeong Heoa, Eun Hun Ohc, Joo-Yul Leea, and Kyu Hwan Leea, b,*


aDepartment of Electrochemistry, Surface Technology Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, Republic of Korea bAdvanced Materials Engineering, University of Science and Technology (UST), Changwon, 51508, Republic of Korea cDepartment of Mechanical Engineering, Pusan National University (PNU), Busan 46241, Republic of Korea

DOI : 10.5695/JSSE.2022.55.3.156

Abstract

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.

Keywords

: K ion detection; ion-selective electrode; NH4 + interference behavior; K+ sensor; deep learning.