聚L-苏氨酸修饰电极法测定特丁基对苯二酚含量

基金项目:

山东省高校科技计划项目(J17KB062)

菏泽学院牡丹研究院科研基金培育计划项目(PR120)。

详细信息

Determination of Tert-butylhydroquinone by a Poly-L-threonine Modified Electrode

College of Chemistry and Chemical Engineering, Heze University, Heze 274015, China

摘要: 利用电化学方法将L-苏氨酸聚合到玻碳电极(glassy carbon electrode,GCE)表面,制备了聚L-苏氨酸修饰电极(poly L-threonine modified glassy carbon electrode,PLTE/GCE)。研究了特丁基对苯二酚在该修饰电极上的电化学行为,建立了测定食品中添加剂特丁基对苯二酚(tert-butylhydroquinone,TBHQ)的新方法。在浓度为2.0×10^-7~2.0×10^-5 mol·L^-1范围内,特丁基对苯二酚在聚L-苏氨酸修饰电极上的氧化峰电流(i_pa)与其浓度呈良好的线性关系,相关系数r=0.9994,检出限为8.6×10^-9 mol·L^-1。对样品中特丁基对苯二酚的进行检测,回收率范围在98.5%~102.6%之间。
- L-苏氨酸 /
- 特丁基对苯二酚 /
- 玻碳电极
Abstract: Poly L-threonine modified glassy carbon electrode was prepared by electropolymerization of L-threonine. The electrochemical behavior of tert-butyl hydroquinone(TBHQ)was studied by cyclic voltammetry(CV). A new method for the determination of TBHQ in food was established. Under the optimal conditions,good liner relationships between current intensities and TBHQ concentrations were obtained in the ranges of 2.0×10^-7~2.0×10^-5 mol·L^-1,with correlation coefficients(r)of 0.9994,the detection limit was 8.6×10^-9 mol·L^-1. The modified electrode can be applied to the analysis of TBHQ in sample with recoveries of 98.5%~102.6%.
- L-threonine /
- tert-butylhydroquinone /
- glassy carbon electrode

1.	孙力博，刘远晓，李萌萌，关二旗，卞科. 发酵面团持气性及品质改良研究进展. 食品与发酵工业. 2023(20): 323-330 . 百度学术
2.	刘思彤，李红民，刘贵巧，王慧珍，宋慧月，张纪英. 面筋蛋白对馒头加工品质影响的研究进展. 现代食品. 2021(04): 42-46 . 百度学术
3.	Feng Jia，Changfu Zhang，Qi Wang，Jinhe Li，Yu Chen，Jinshui Wang. Physicochemical and structural characteristics of the Venn components of wheat gliadin. Grain & Oil Science and Technology. 2020(01): 18-24 . 必应学术