基于四氧化三铁磁性纳米材料检测油炸食品中特丁基对苯二酚的研究

Determination of Tert-Butylhydroquinone in Fried Food Based on Fe3O4 Magnetic Nanomaterials

以四氧化三铁(Fe3O4)磁性纳米材料为基质,玻碳电极(glassy carbon electrode,GCE)为工作电极,制备Fe3O4/GCE传感器对油炸食品中的特丁基对苯二酚(tert-butylhydroquinone,TBHQ)进行定量分析。研究发现:Fe3O4具有良好的导电性和催化作用,能够有效地促进电极表面电子的转移速率,增大电流响应,提高电极灵敏度。在最佳试验条件下,利用Fe3O4/GCE对薯条中的TBHQ进行定量分析,结果显示:TBHQ浓度与其氧化峰电流在0.5μg/mL^35μg/mL范围内呈良好的线性关系,线性方程为:Y=2.9841X+0.0480(X为TBHQ浓度,Y为氧化峰电流),R2=0.9996,检出限(3σ)为0.21μg/mL,加标回收率在99.60%~106.25%之间,精密度较高,与气相色谱法相比,结果一致,可信度较高,符合试验要求,且Fe3O4/GCE稳定性、重复性较好,可用于实际样品中TBHQ的定量分析。

Ferric oxide(Fe3O4)/glassy carbon electrode(GCE)biosensor was prepared based on Fe3O4 magnetic nanomaterials and GCE.And The quantitative analysis of tert butyl hydroquinone(TBHQ)in fried food was carried out by Fe3O4/GCE.It was found that Fe3O4 had a good conductivity and catalysis,could effectively promote the electron transfer on the electrode surface,increase the current response and improve the electrode sensitivity.TBHQ in fried food was detected by Fe3O4/GCE under optimal conditions.The study found that there was a wide linear from 0.5μg/mL-35μg/mL between the TBHQ concentration and oxidation peak current,the equation was Y=2.9841X+0.0480(X stand for TBHQ concentration,Y stand for oxidation peak current),R2=0.9996,the detection limit(3σ)for TBHQ was 0.21μg/mL.The recovery was 99.60%-106.25%,recycling was very better and the accuracy of the method was very high,the results were consistent with the outcome that obtained by gas chromatography and reliable,which can afford for the requirement of the applition.And Fe3O4/GCE has good stability and repeatability,which can be used for the quantitative analysis of TBHQ in samples.