It was found that under the UV irradiation ,uranium ( Ⅵ) can be reduced by isopropyl alcohol to form uranium (Ⅵ) ,and uranium ( Ⅳ) can induce the precipitation reaction of iron ( Ⅲ) with potassium ferricyanide, resulting in the decreasing of resonance frequency of a wireless magnetoelastic sensor on which the precipitation was deposited. Based on these findings , a new wireless sensing method for the determination of uranium ( Ⅵ) has been developed. Under the condition of the concentrations of iron ( Ⅲ ) ,potassium ferricyanide and sulphunc acid being 0. 01 ,0. 01 and 0. 5 mol/L, respectively , the linear range for the determination of uranium (Ⅵ) was 0. 12 ～ 14. 1 μg/mL with the detection limit of 0. 02 μg/mL.The proposed method was applied successfully for the determination of uranium ( Ⅵ) in water samples with the recoveries of 96. 7％ ～ 104.0 ％.%发现铀(Ⅵ)在紫外光的照射下可以被异丙醇还原成铀(Ⅳ),而铀(Ⅳ)可以使铁(Ⅲ)与铁氰化钾溶液产生沉淀,产生的沉淀可沉积到磁弹性传感器上使其共振频率发生变化.基于这些发现,建立了无线传感法测定铀(Ⅵ)的新方法.在铁(Ⅲ)、铁氰化钾和硫酸浓度分别为0.01、0.01和0.5 mol/L的条件下,测定铀(Ⅵ)的线性范围为0.12～14.1μg/mL,检出限为0.02μg/mL.应用该方法测定了实际样品中的铀(Ⅵ),回收率为96.7%～104.0%.
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