维生素C对奶粉化学振荡体系的扰动性研究

Disturbance of Vitamin C on Chemical Oscillation System of Milk Powder

摘要:

研究了维生素C对(NH4)4Ce(SO4)4-NaBrO3-丙二酸化学振荡系统振荡的影响规律。以奶粉与纯水空白样为检测样本，将检测样本加入反应池后进行数据采集，当振荡曲线平稳进行到8min时，分别加入不同质量的维生素C，考察维生素C添加量对相应振荡图谱直观信息与特征参数的影响。结果表明：当每克奶粉中维生素C添加量大于0.0015g时，奶粉与纯水空白样的直观图谱及部分特征参数均变化较为明显，尤其当维生素C添加量大于0.0106g时，奶粉振荡图谱的特征参数干扰后的最大振幅基本不变，振荡状态基本停止。随着不同添加量维生素C的加入，空白样品化学振荡图谱存在一定的差异，当维生素C添加量大于0.0203g时，干扰后的最大振幅基本达到平稳状态，而干扰后的峰谷电位则随着维生素C添加量的逐渐增加而降低，当维生素C添加量大于等于0.0254g时，干扰后的峰谷电位基本不再发生变化。本研究可为奶粉样本中维生素C含量的定性与定量检测分析提供理论依据。

Abstract:

The effect of vitamin C on the oscillation of (NH4)4Ce(SO4)4-NaBrO3-malonic acid chemical oscillation system was studied. The blank samples of milk powder and pure water were taken as test samples, and the data were collected by clicking the menu. When the oscillation curve was smooth for 8min, different amounts of vitamin C were added to investigate the influence of each amount of vitamin C on the visual information and characteristic parameters of the corresponding oscillation spectrum. The results showed that when the amount of vitamin C was more than 0.0015g per gram milk powder, the visual spectrum and some characteristic parameters of milk powder and pure water blank samples were changed significantly, especially when the amount of vitamin C was more than 0.0106g, the maximum amplitude of characteristic parameters of milk powder oscillation spectrum after interference was basically unchanged, and the oscillation state basically stopped. For the interference of vitamin C to the blank sample, when the vitamin C content was greater than 0.0203g, the maximum amplitude after interference basically reached a stable state, and the peak valley potential after interference was decreased with the gradual increase of vitamin C content. When the vitamin C content was greater than or equal to 0.0254g, the peak valley potential after interference basically did not change. The research result provided a theoretical basis for the qualitative and quantitative analysis of vitamin C content in milk powder samples.