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本文研究了硫酸介质中痕量Se(Ⅳ)催化加速碘酸钾、过氧化氢和中性红之间的褪色反应及动力学条件,建立了动力学光度法测定痕量Se(Ⅳ)的新方法,其灵敏度为1.6×10~(-11)g/mL Se(Ⅳ),测定范围0～0.2μg/25mL Se(Ⅳ)。本方法用于测定人发中的Se(Ⅳ),获得了满意的结果。
In this paper, the catalytic reaction of trace Se (Ⅳ) in sulfuric acid medium to accelerate the discoloration reaction and kinetic conditions between potassium iodate, hydrogen peroxide and neutral red was studied. The kinetic spectrophotometric method for the determination of trace Se (Ⅳ) Method with the sensitivity of 1.6 × 10 ~ (-11) g / mL Se (Ⅳ) and the determination range of 0 ~ 0.2μg / 25mL Se (Ⅳ). The method was applied to the determination of Se (Ⅳ) in human hair and satisfactory results were obtained.