火焰原子吸收光谱法直接测定食用菌中的铅和镉

Direct Determination of Lead and Cadmium in Edible Fungi by FAAS

采用火焰原子吸收法直接测定了食用菌中铅和镉的含量。方法灵敏、准确 ,测定时无须富集、萃取 ,操作简便 ,快速 ,铅和镉的相对标准偏差分别在 3 3 %～ 7 3 %和 3 1 %～ 7 5 %之间 ,回收率在 94%～ 1 0 6%和 95 %～ 1 0 5 %之间 ;检出限为 0 0 1 6mg/L和 0 0 0 8mg/L。

A method for direct determination of Pb and Cd in edible fungi by flame atomic absorption spectrometry (FAAS) has been developed with high sensitivity and fine accuracy.The preconcentration and extraction are not necessary for the determination,so the method is rapid and easy to operate.The relative standard deviation of Pb and Cd are 3.3%～7.3% and 3.1%～7.5%,the recovery of Pb and Cd are 94%～106% and 95%～105%,the detection limit of Pb and Cd are 0.016 mg/L and0.008 mg/L.