Abstract A highly sensitive and selective voltammetric method was developed for the determination of curcumin using sodium dodecyl sulfate modified carbon nanocomposite paste electrode. The electrochemical performance for curcumin was characterized by the use of linear sweep voltammetry, cyclic voltammetry, and differential pulse voltammetry. These measurements showed that the sodium dodecyl sulfate modified carbon nanocomposite paste electrode provided excellent electrocatalytic enhancement for the oxidation of curcumin compared to an unmodified carbon nanocomposite paste electrode. Using the optimized conditions, the oxidation peak current showed a linear response from 2 × 10−7 to 1 × 10−6 M and 1.5 × 10−6 to 4.5 × 10−6 M with a detection limit equal to 2.7 × 10−8 M and limit of quantification equal to 9.2 × 10−8 M. The simultaneous determination of curcumin and vitamin B2 included a well resolved peaks, that provides rapid and selective analysis in the presence of vitamin B2. Moreover, the practical application of the developed electrode was performed for the analysis of a natural food supplement for curcumin.

中文翻译：

---

基于阴离子表面活性剂改性碳纳米复合材料的低成本伏安传感器快速测定天然食品补充剂中的姜黄素

摘要 采用十二烷基硫酸钠修饰的碳纳米复合糊状电极，建立了一种高灵敏度和选择性伏安法测定姜黄素。姜黄素的电化学性能通过使用线性扫描伏安法、循环伏安法和微分脉冲伏安法进行表征。这些测量表明，与未改性的碳纳米复合糊电极相比，十二烷基硫酸钠改性的碳纳米复合糊电极为姜黄素的氧化提供了优异的电催化增强。使用优化条件，氧化峰电流显示线性响应从 2 × 10−7 到 1 × 10−6 M 和 1.5 × 10−6 到 4.5 × 10−6 M，检测限等于 2.7 × 10−8 M 和定量限等于 9.2 × 10−8 M。姜黄素和维生素 B2 的同时测定包括分离良好的峰，可在维生素 B2 存在的情况下提供快速和选择性分析。此外，所开发的电极的实际应用还用于分析姜黄素的天然食品补充剂。