化学
检出限
硫脲
单宁酸
微分脉冲伏安法
电极
缓冲溶液
碳糊电极
循环伏安法
玻璃碳
吡咯烷
橙汁
核化学
校准曲线
无机化学
色谱法
有机化学
电化学
物理化学
食品科学
作者
Ümmihan T. Yilmaz,Elif Çalık,Demet Uzun,Fatma Karipçin,Haşim Yılmaz
标识
DOI:10.1016/j.jelechem.2016.06.037
摘要
In this study the selective determination of tannic acid (TA) was performed using a glassy carbon (GC) electrode modified with 1-benzoyl-3-(pyrrolidine) thiourea (PrTu). PrTu was deposited on the GC electrode in nonaqueous media by cyclic voltammetry. PrTu-GC electrode demonstrated an electrocatalytic effect on the oxidation of TA using differential pulse voltammetry (DPV) method in 0.1 M Britton Robinson (BR) buffer solution of pH 2. Under optimum conditions, linear calibration graphs were obtained over the TA concentration range 2.0 × 10− 6 to 4.2 × 10− 5 M. The limit of detection (LOD) was found as 0.6 μM. The proposed electrode was applied to the determination of spiked TA in tea. The proposed method was also applied for the determination of TA in orange juice samples and the results of the experiments were in agreement with that obtained by the spectrophotometric comparison method.
科研通智能强力驱动
Strongly Powered by AbleSci AI