维生素K_3对Cu(Ⅱ)-H_2O_2-NaSCN化学振荡反应的影响

The effect of vitamin K_3 on Cu(Ⅱ)-H_2O_2-NaSCN chemical oscillation

研究了在碱性条件下,维生素K3(以下简称VitK3)对Cu2+催化H2O2和NaSCN的化学振荡反应(以下简称铜体系)的影响.结果表明,VitK3的加入会使振荡图形的周期和振幅均增大,且VitK3浓度与加入VitK3后第一周期的改变值(ΔT1)呈良好的线性关系.线性范围分别为5 26×10-7～2 17×10-4mol/L和3 21×10-4～8 87×10-3mol/L,相关系数分别为0 9981和0 9975.初步探讨了VitK3对铜体系振荡反应影响的机理.

The effects of vitamin K3 on the c opper(Ⅱ)-cataly zed oscillating reaction between hydrogen peroxide and sodium thiocyanate are studied.Results show that adding of vitamin K3 can perturb the oscollating period and amplitude.The changes of the oscillation period are linearly proportional to the vitamin K3 concentration both from 5.26×10-(-7_ to 2.17×10-(-4_ mol/L and from 3.21×10-(-4_ to 8.87×10-(-3_ mol/L ,respectively. The related coefficients are 0.998 1 and 0.997 5. Some aspects of the interaction of vitamin K3 with the oscillation chemical system are discussed.