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Eco-friendly flow injection amperometric determination of tert-butylhydroquinone in edible oil samples using micelle-mediated reverse-phase dispersive liquid-liquid microextraction and unmodified screen-printed carbon electrode
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DOI：10.1039/D6AY01019A.png)
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Abstract
En 中文
Lipid oxidation compromises the stability of edible oils; especially refined ones; due to reduced natural antioxidants. Synthetic antioxidants like tert-butylhydroquinone (TBHQ) are widely used but require careful monitoring. This study developed a rapid; low-cost; and environmentally friendly method using micelle-mediated reverse-phase dispersive liquid-liquid microextraction (RP-DLLMEM) combined with flow injection analysis (FIA) and electrochemical detection for TBHQ determination in oils. Oil samples (1.0 mL) were mixed with 2 mL Triton X-100 (30 mM) containing TBHQ; vortexed for 60 s; and centrifuged. Detection of TBHQ was carried out by using an FIA system and an unmodified screen-printed carbon electrode at 0.7 V. The method achieved recoveries of 95–109% in soybean; corn; and sunflower oils; with linearity from 15.2–1200 µmol L-1 (R² = 0.997); LOD of 5.0 µmol L-1; LOQ of 15.2 µmol L-1. RP-DLLMEM/FIA offers a simple; efficient; and green alternative to TBHQ analysis in edible oils.
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