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本文报道了双柱碳纤维微电极的研究及应用.分别用循环伏安法,计时电流法考察了该电极的性能,并用实验验证了双柱微电极的稳态电流理论公式,探讨了理论曲线与实验结果偏离的原因.采用发生-收集模式,提出间接测定维生素B_1的方法,并取得了满意的结果,维生素B_1的检测限为1.0×10~(-6)mol·dm~(-3),线性范围为7.5×10~(-6)～7.5×10~(-4)mol·dm~(-3).
In this paper, the research and application of double-column carbon fiber microelectrode was studied.The cyclic voltammetry and chronoamperometry were respectively used to investigate the performance of the electrode, and the steady-state current theoretical formula of double column microelectrode was verified by experiments, The reason for the deviations of the experimental results was discussed.The method of indirect determination of vitamin B 1 was proposed by using the genesis-collection model, and the satisfactory results were obtained.The detection limit of vitamin B 1 was 1.0 × 10 -6 mol · dm -3, The linear range was 7.5 × 10 ~ (-6) ~ 7.5 × 10 ~ (-4) mol · dm -3.