【摘要】 在pH 9.56的NaBH4-NaOH缓冲溶液中,Se(Ⅳ)催化亚甲基蓝(Methylene Blue)氧化硫离子褪色,由此建立了测定硒的动力学光度法,并确定了反应的最佳条件。结果表明,测定Se(Ⅳ)的线性范围为0~0.18μg/L,检测下限为22μg/L,方法应用于魔芋飞粉中硒含量的测定,简单快速,结果令人满意。更多还原

【Abstract】 In 9.56 NaBH₄-NaOH buffer solution and in the presence of methylene blue（MB）,MB was catalysised by Selenium（Ⅳ）to oxidize S^2- fade ultraviolet photometric and to determine the content of Se.A catalytic spectrophotometric method for the determination of selenium has been developed.The optimal detection conditions were found out.The range of linear was 0～0.18 μg/L and the detection limit was 22 μg/L.The method has been applied to determine the content of selenium in the flyer powder of konjac.The developed method is rapid and easy to operate.更多还原