Simultaneous Determination of Rosmarinic Acid and Protocatechuic Acid at Poly(o‐Phenylenediamine)/Pt Nanoparticles Modified Glassy Carbon Electrode,Electroanalysis

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Simultaneous Determination of Rosmarinic Acid and Protocatechuic Acid at Poly(o‐Phenylenediamine)/Pt Nanoparticles Modified Glassy Carbon Electrode
Electroanalysis ( IF 2.7 ) Pub Date : 2019-07-26 , DOI: 10.1002/elan.201900144
Kemal Volkan Özdokur ₁ , Çağrı Ceylan Koçak ₂

Affiliation

A system of Pt nanoparticles and poly(ortho‐phenylenediamine) film electrochemically deposited onto a glassy carbon electrode (GCE/PoPD/Pt) was fabricated. Scanning electron microscopy, Fourier‐transform infrared spectroscopy, and atomic force microscopy techniques were used to identify the surface characteristics of the composite electrode. The conductive polymers and Pt nanoparticles together resulted in a synergistic effect, and the new formed surface was highly active against polyphenolic structures. Rosmarinic acid (RA) and protocatechuic acid (PCA) are phenolic compounds found in plants, and they are used in many applications, particularly as pharmaceuticals. The GCE/PoPD/Pt was used for the simultaneous determination of RA and PCA in a pH 2.0 H₂SO₄ solution for the first time. The RA and PCA concentrations were determined using differential pulse voltammetry (DPV) and chronoamperometry. By the amperometry measurement, for RA and PCA, a linear relation was observed in the concentration ranges of 1–55 μmol L⁻¹ and 1–60 μmol L⁻¹, with detection limits of 0.5 μmol L⁻¹ and 0.6 μmol L⁻¹, respectively. In the simultaneous determination with DPV, the detection limits for both RA and PCA were calculated as 0.7 μmol L⁻¹. The GCE/PoPD/Pt was successfully used for the simultaneous determination of RA and PCA in a real sample, and its accuracy was verified by high‐performance liquid chromatography studies.

中文翻译：

聚邻苯二胺/铂纳米粒子修饰玻碳电极同时测定迷迭香酸和原儿茶酸

制备了将Pt纳米颗粒和聚（邻苯二胺）膜电化学沉积到玻璃碳电极（GCE / PoPD / Pt）上的系统。扫描电子显微镜，傅立叶变换红外光谱和原子力显微镜技术被用来识别复合电极的表面特性。导电聚合物和Pt纳米颗粒共同产生协同作用，新形成的表面对多酚结构具有很高的活性。迷迭香酸（RA）和原儿茶酸（PCA）是植物中发现的酚类化合物，它们被用于许多应用中，尤其是作为药物。GCE / PoPD / Pt用于同时测定pH 2.0 H ₂ SO _4中的RA和PCA第一次解决。RA和PCA浓度使用差分脉冲伏安法（DPV）和计时电流法测定。由电流分析法测量，RA和PCA，在1-55的微摩尔L中的浓度范围中观察到的线性关系^-1和1-60微摩尔大号^-1，具有为0.5μmolL检测限^-1和0.6微摩尔大号^-分别为¹。在用DPV同时测定时，RA和PCA的检出限均计算为0.7μmolL ^-1。GCE / PoPD / Pt成功地用于同时测定真实样品中的RA和PCA，并通过高效液相色谱研究验证了其准确性。

更新日期：2019-11-18

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