非线性电化学图谱技术鉴别山茶油的应用研究

Application of Nonlinear Electrochemical Mapping Technology to Identify Camellia Oil

本文主要探索了山茶油为底物的BrO_(3)^(-)-Mn^(2+)-H^(+)-丙酮振荡体系的反应机理,考察了微量(0~0.5 mL)、常量(0.5~2.5 mL)及过量(3.5~4.5 mL)加入山茶油对指纹图谱特征参数的影响。振荡体系随着Br^(-)浓度的变化,周期性发生Mn^(3+)与Mn^(2+)(氧化或还原)转化反应,丙酮和山茶油为耗散物,其他物质则周期性复原。因而在确定的振荡体系中(丙酮量一定),山茶油用量(微量、常量、过量)与波数、振荡周期以及振幅呈一定的规律变化,该研究为油脂、食品、药品等复杂体系非线性电化学指纹图谱鉴别中取样量的确定提供了一定的理论依据。

This paper mainly explored the reaction mechanism of the BrO_(3)^(-)-Mn^(2+)-H^(+)-acetone oscillating system with camellia oil as the substrate,and investigated the influence of camellia oil on the fingerprint characteristic parameters when it was added in trace(0~0.5 mL),constant(0.5~2.5 mL)and excessive(3.5~4.5 mL).The oscillating system periodically undergoes the conversion reaction of Mn^(3+)and Mn^(2+)(oxidation or reduction)with the change of Br^(-)concentration.Acetone and camellia oil are dissipative substances,and other substances are recovered periodically.Therefore,in the determined oscillating system(with a certain amount of acetone),the amount of camellia oil(micro,constant,excessive)varies regularly with the wave number,oscillating period and amplitude.This study provides a theoretical basis for the determination of the sampling amount in the non-linear electrochemical fingerprint identification of complex systems such as oils,food,drugs,etc.