Simultaneous Determination of Antioxidants in Edible Oils Using Graphene Oxide/β‐Cyclodextrin‐modified Electrochemical Sensor

Abstract

In this work, graphene oxide/β‐cyclodextrin (GO/β‐CD) composite was synthesised and applied to construct a highly sensitive electrochemical sensor for the determination of propyl gallate (PG) and butyl hydroxy anisole (BHA) in edible oil, simultaneously. Various methods were used to characterize the properties of GO/β‐cyclodextrin composite. Furthermore, the oxidation peak currents of PG and BHA were increased obviously at the modified glassy carbon electrode, which improved the sensitivity of proposed method. Under optimal conditions, the peak currents of PG and BHA increased linearly with its concentration in the range of 0.1–30.0 μmol/L and 0.05–30 μmol/L, respectively. The limit of detections were as low as 0.01 μmol/L and 0.03 μmol/L, respectively. Finally, the sensor was successfully applied to edible oil sample analysis. The recoveries varied from 95.3 % to 108.6 % with the RSDs 2.9 %–4.9 %, indicated that the proposed sensor can be used for the simultaneous determination of PG and BHA in edible oil.

A lab-made screen-printed sensing strip for sensitive and selective electrochemical detection of butylated hydroxyanisole

“…To compare the sensing performance of Pt/g-C 3 N 4 –Fe 3 O 4 /LabSPE, the analytical characteristics (linear range, LOD, and analysis technique) of BHA sensors reported in recent years were summarized in Table 3. As can be clearly seen in Table 3, the sensing performance of our proposed sensor is greater than that of the other BHA sensors except for glassy carbon electrode modified with graphene oxide/β-cyclodextrin composite 60 and molecularly imprinted electrode based on 3D-flower-like MoS 2 decorated with silver nanoparticles. 48 This sensing performance of Pt/g-C 3 N 4 –Fe 3 O 4 /LabSPE may be attributed to the high catalytic activity of Pt NPs, 21,61 and efficient electron transfer at the interface of the sensor due to the synergistic effect of g-C 3 N 4 –Fe 3 O 4 and Pt NPs.…”

PEDOT for Sensitive Electrochemical Detection of Trimetazidine Hydrochloride in Biological Fluids: Synthesis, Characterization and Mechanism Insights

“…The obtained results suggest that the second peak observed in the voltammogram of TMZ is attributed to the oxidation of methoxy groups in anisole molecules. 64 The difference between the two peaks observed in TMZ (1.27 V) and anisole (1.50 V) in terms of shape and potential value may be linked to the piperazine part in TMZ chemical structure which affects the oxidation process. Furthermore, we can also assume that the wave seen at higher potential could be related to the oxidation of that same group.…”