“…[39][40][41][42] Therefore, CNT-based ISEs exhibit high analytical performance to detect many ions of biological and environmental importance such as K + , Na + , Mg 2+ , NH 4 + , Ca 2+ , SiO 3 2− , Hg 2+ , Cd 2+ , Pb 2+ , NO 3 − , Al 3+ , ClO 4 − , I − , and Cr 3+ . [43][44][45][46][47][48][49][50][51][52][53] Additionally, the CNT-based SC-ISEs were used extensively for the detection of chemical and pharmaceutical compounds such as bisphenol S, 54 fluoxetine, 55 barbital, 56 nalbuphine. 57 Rius et al 58 pioneered the application of CNTs in SC-ISEs by using single-walled carbon nanotubes (SWCNTs) as an ionto-electron transducer, which exhibited good signal stability (25 days) and a short response time (fewer than 10 s for activi-ties over 10 −5.5 M) for the detection of K + .…”