福建师范大学化学与化工学院
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黄颖, 陈丽飞, 郑思宁. Ag-SiO2 石墨复合电极测定电子产品中四溴双酚A[J]. 分析测试学报, 2016,35(5):545-550.
Detection of Tetrabromobisphenol A in Electronic Products Using Ag-SiO2 Modified Carbon Paste Electrode[J]. 2016,35(5):545-550.
制备了银与白炭黑复合物修饰碳糊电极(Ag-SiO2/CPE),建立了一种简便、灵敏的检测四溴双酚A(TBBPA)的电化学方法。 合成了Ag-SiO2复合物并用扫描电子显微镜(SEM)、红外光谱法(FT-IR)和X射线光电子能谱法(XPS)对其形貌和结构进行表征。采用循环伏安法(CV)及交流阻抗法(EIS)对Ag-SiO2/CPE的电化学性能进行表征。 以CV和线性扫描伏安法(LSV)探讨了TBBPA在Ag-SiO2/CPE上的电化学氧化行为。 结果表明:与裸CPE相比,Ag-SiO2/CPE对TBBPA的电催化氧化活性明显提高。优化了测定过程中的实验条件如修饰剂含量、pH值与扫速,考察了该修饰电极的重现性、稳定性和干扰性。 在最佳条件下,TBBPA浓度在0.010~0.10 μmol/L和0.10~25 μmol/L范围内与氧化峰电流呈良好的线性关系,检出限为1.9 nmol/L。 以此方法测定电子产品中TBBPA的含量,回收率为96%~103%,测定结果与毛细管电泳法吻合。
A simple and sensitive electrochemical method was developed for the determination of 3,3′5,5′-tetrabromobisphenol A(TBBPA) based on Ag-loading white carbon black composites modified carbon paste electrode(Ag-SiO2/CPE).Ag-SiO2 composite was synthesized and its morphology and structure were characterized by scanning electron microscopy(SEM),fourier infrared spectrometry(FT-IR) and X ray photoelectron spectroscopy(XPS).The electrochemical property of Ag-SiO2/CPE was characterized by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).Futhermore,CV and linear sweep voltammetry(LSV) were proposed to study the electrochemical oxidation behavior of TBBPA at the modified electrode.The CV results showed that,compared with bare electrode,the modified electrode displayed an enhanced electrocatalytic activity toward the oxidation of TBBPA with a well defined cyclic voltammetric peak.Conditions influencing the detection process such as content of modifier,pH value of buffer solution and scan rate were optimized.Also,the repeatability,stability and selectivity were further studied.Under the optimized conditions,the oxidation current increased linearly with the increase of TBBPA concentration in the ranges of 0.010-0.10 μmol/L and 0.10-25 μmol/L,and the detection limit(S/N=3) was found to be 1.9 nmol/L.The proposed method was applied in the direct determination of TBBPA in electronic products with satisfactory results,and the recoveries were in the range of 96%-103%.The results agreed quite well with those obtained by capillary electrophoresis(CE).
银与白炭黑复合物四溴双酚A电化学电子产品
Ag-loading white carbon black composites33′55′ tetrabromobisphenol Aelectrochemistryelectronic product
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