火焰原子吸收光谱法测定桑叶中Cu、Pb、Cd的含量

The Ditermination of Copper Lead and Cadmium in Mulberry Leaves by AAS

本文用火焰原子吸收光谱法测定了桑叶中Ｃｕ、Ｐｂ、ｃｄ的含量，并研究了样品的不同消化方法对其测定的影响，选择了ＨＮＯ＿３＋ＨＣｌＯ＿４＋ＨＦ消化苯系用于实际测定。方法的灵敏度依次为０．３１４μｇ／ｍｌ／１％，０．０３２μｇ／ｍｌ／１％，０．０５４μｇ／ｍｌ／１％。相对标准偏差依次为４．９％，３．４％，２．１％。加标回收率依次为９７－１０２％，９８－１０２％，９７－１０１％。

The titel method is used to analyze Cu,Pb and Cd in mulberry leaves. Thedigestion system was studied.The sample digested by HNO_3-HClO_4-HF system ForCu,Pb and Cd, respectively,theli limit of detection is 0.314 μg/ml/1%,0.032μg/ml/1%and 0.054μg/ml/1%,the standard deviation of meansurement is 4.9%,3.4%and2.1%,and the rate of recovery is 97-102%,98-102%and 97-101%.