We developed a potentiometric ion-selective electrode (ISE) for detecting the food dye sunset
yellow (SY). Sunset yellow-Methyltrioctylammonium chloride ion pairs were synthesized.
The ion pair that was synthesized was employed as ionophorein the configuration of the
electrode membrane. PVC membrane ion-selective electrodes in various compositions were
produced using the ion pairs that were synthesized and then, potentiometric performance
characteristics of these electrodes were investigated. It was determined that the electrode with
the composition of 3.0 % sunset yellow-Methyltrioctylammonium (Sunset-MTOA) ion pair,
64.8 % nitrophenyloctyl ether (NPOE), 32.0 % polyvinylchloride (PVC) and 0.2 % potassium
tetrakis (4-chlorophenylborate) (KTpClPB) demonstrated the best potentiometric performance
properties. The linear range, slope, limit of quantification, pH range, and the response time of
the electrode were determined as 1.0 × 10-5
-5.0 × 10-2 M, 23.6 mV,1.0 × 10-5 M,6.4-9.1, and
≈ 5 sec, respectively. The electrode exhibited a highly repeatable potentiometric response.