电感耦合等离子体原子吸收光谱法测定木菠萝树叶与树干中12种元素

Simultaneous ICP-AES Determination of 12 Elements in Leaves and Trunk of Artocarpus Heterophyllus Lam

摘要: 采用用电感耦合等离子体原子发射光谱法测定了木菠萝树叶与树干中铁、锰、铜、锌、钙、镁、钠、钾、铝、铅、镉和镍等12种元素含量.试样用灰化法处理,其残渣用稀硝酸和过氧化氢溶解.选择硝酸(2+98)溶液作为介质,选择波长为238.204,257.610,327.393,206.200,317.933,285.213,589.592,404.721,396.153,220.353,228.802,221.648 nm 12条谱线依次作为铁、锰、铜、锌、钙、镁、钠、钾、铝、铅、镉和镍的分析线,测得12种元素的检出限(3s)均低于0.100 mg·L-1.方法用于木菠萝树叶和树干试样分析,所得测定值的相对标准偏差(n=6)为0.38%~5.52%.

Abstract: An ICP-AES method for the simultaneous determination of Fe,Mn,Cu,Zn,Ca,Mg,Na,K,Al,Pb,Cd and Ni in leaves and trunk of Artocarpus heterophyllus Lam was proposed.The sample was treated by ashing and the residue was dissolved in dil.HNO3+H2O2.Nitric acid (2+98) was chosen as the solution medium,and spectral lines with wavelengths of 238.204,257.610,327.393,206.200,317.933,285.213,589.592,404.721,396.153,220.353,228.802,221.648 nm were selected as analytical lines for the determination of Fe,Mn,Cu,Zn,Ca,Mg,Na,K,Al,Pb,Cd and Ni respectively.Detection limits (3s) for the 12 elements found were less than 0.100 mg·L-1.The proposed method was applied to the analysis of samples of leaves and trunk of artocarpus heterophyllus Lam,giving values of RSD′s (n=6) in the range of 0.38%-5.52%.