【摘要】 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^-5mol/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。更多还原

【Abstract】 A new fluorometric method was developed for the determination trace amount of vanadium by using the reaction of V（V）with thiamine in sulfuric acid.A linear rela- tionship between fluorescent intensity and concentration was in the range of 2.50×10^-7～1.75× 10^-5mol/L at 400(λ_ex)and 464(λ_em)nm.Tho method has been applied to the determination of vanadium in grain samples with satisfactory results.更多还原