B族维生素对B-Z振荡的扰动及其测定

Effect of concentration of vitamin B on the B-Z oscillating chemical reaction and its measurement

研究了维生素B1、B2和B6对以丙二酸．硫酸铈铵-溴酸钾-硫酸振荡体系的扰动，得出不同浓度的维生素B1、B2和B6能够对该振荡反应曲线的△E（振幅即振荡强度）和△t（振荡周期）产生明显影响；组成浓度、反应温度和自由基对该振荡反应也有影响；得出不同B族维生素的浓度与振荡周期变化值及振幅变化值均有良好的线性关系；

The oscillating reaction of vitamins B1,B2 and B6 in the CH2(COOH)2-BrO-3-Ce4+-H2SO4 system was studied in a batch reactor,and the characteristics of the oscillating curve were described at the same time.The effect of concentration of reactants,temperature,and free radicals on the oscillating reaction was also studied.The results showed a linear relationship between the changes in the oscillation period and the amplitude of the chemical system with the concentration of vitamin B1,vitamin B2,and vitamin B6 being in the range of 1.10×10-5～3.26×10-4 mol/L,4.65×10-5～2.40×10-4 mol/L,and 7.30×10-3～1.50×10-2 mol/L,respectively.Accordingly,the quantitative analysis of vitamins B1,B2 and B6 can provide reliable information and basic data.