CAJ | 학술논문

研究了α-山竹黄酮和γ-山竹黄酮在玻璃碳电极上的电化学行为, 研究了pH和静置时间等因素的影响, 探讨了α-山竹黄酮和γ-山竹黄酮在玻璃碳电极上的氧化机理, 建立了差分脉冲伏安法同时测定α-山竹黄酮和γ-山竹黄酮的方法. 在pH 3.1的BR缓冲介质中, α-山竹黄酮在0.822 V产生灵敏的氧化峰, γ-山竹黄酮在0.426 V和0.700 V产生灵敏的氧化峰. 对α-山竹黄酮, 相应的氧化峰的峰高与浓度在5.00×10~(-6) mol/L～2.00×10~(-4) mol/L范围内呈良好的线性关系, 线性相关系数为0.9950;对γ-山竹黄酮, 其在0.426 V氧化峰的峰高与浓度在2.00×10~(-5) mol/L～6.00×10~(-4) mol/L浓度范围内呈良好的线性关系, 线性相关系数为0.9904. 该方法测量2.00×10~(-4) mol/L 的α-山竹黄酮和γ-山竹黄酮相对标准偏差分别为3.3%和4.1% (n=10).
연구료α-산죽황동화γ-산죽황동재파리탄전겁상적전화학행위, 연구료pH화정치시간등인소적영향, 탐토료α-산죽황동화γ-산죽황동재파리탄전겁상적양화궤리, 건립료차분맥충복안법동시측정α-산죽황동화γ-산죽황동적방법. 재pH 3.1적BR완충개질중, α-산죽황동재0.822 V산생령민적양화봉, γ-산죽황동재0.426 V화0.700 V산생령민적양화봉. 대α-산죽황동, 상응적양화봉적봉고여농도재5.00×10~(-6) mol/L～2.00×10~(-4) mol/L범위내정량호적선성관계, 선성상관계수위0.9950;대γ-산죽황동, 기재0.426 V양화봉적봉고여농도재2.00×10~(-5) mol/L～6.00×10~(-4) mol/L농도범위내정량호적선성관계, 선성상관계수위0.9904. 해방법측량2.00×10~(-4) mol/L 적α-산죽황동화γ-산죽황동상대표준편차분별위3.3%화4.1% (n=10).
Electrochemical behavior of α-mangostin and γ-mangostin on a glassy carbon disk electrode was studied through investigation of the effect of pH, quit time etc. A novel differential pulse voltammetry (DPV) for the simultaneous determination of α-mangostin and γ-mangostin in the mixture was established. In Britton-Robinson buffer (pH 3.1), α-mangostin and γ-mangostin can be oxidized on the electrode to produce oxidative peaks at the potentials of 0.822 V and 0.426 V (vs SCE) respectively. The corresponding peak currents are proportional to the concentration within 5.00×10~(-6)～2.00×10~(-4) mol/L for α-mangostin and within 2.00×10~(-5)～6.00×10~(-4) mol/L for γ-mangostin respectively. The linear correlation coefficients are 0.9950 and 0.9904 for α-mangostin and γ-mangostin respectively. The RSDs are 3.3% and 4.1% (n=10) for 2.00×10~(-4) mol/L α-mangostin and γ-mangostin separately.