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本文首次提出了以硫胺素为荧光剂测定微量钒的新方法。该法基于 V(V)-硫胺素反应生成荧光物质,其λ_(ex)=400nm,λ_(em)=464nm,当钒的浓度在2.5×10~(-7)～1.75×10~(-5)mol/L 范围内与荧光强度呈良好的线性关系,用本法测定了粮食样品中的微量钒,获得了满意结果。
This article for the first time proposed a new method for the determination of trace vanadium with thiamine as a fluorescent agent. The method is based on the reaction of V (V) -thiamin to form the fluorescent substance. The results show that when the concentration of vanadium is between 2.5 × 10 -7 ~ 1.75 × 10 ~ (λ) -5) mol / L with the fluorescence intensity showed a good linear relationship between the determination of trace amounts of trace vanadium food samples obtained satisfactory results.