【摘要】 使用Meso-四(3,5-二溴-4-羟基苯基)卟啉分光光度法测定食用菌样品中的微量铅。在0.08mol/L的NaOH介质中,铅与Meso-四(3,5-二溴-4-羟基苯基)卟啉试剂形成黄色配合物,定量测试结果表明,在波长479nm处,铅含量在0.04~4.8mg/kg内,符合朗伯-比尔定律,可直接测得样品中的铅含量。该方法具有精度高、回收率高、操作简便、速度快和易于推广等优点。更多还原

【Abstract】 The trace Lead in edible fungi and cultural media were determined by meso-tetra(3,5-dibromo-4-hydroxyphenyl)porphyrin spectrophotometric method.In 0.08mol/L NaOH medium,an orange complex was formed by Lead and T(DBHP)P.The determination results showed that the concentration was in0.04～4.8mg/kg at λ=479nm,which was in accordance with Beer’s law.The proposed method was proved to be sensitive,stable,rapid and convenient comparing to the traditional methods such as Dithizone’s method,etc.更多还原