电感耦合等离子体质谱法(ICP-MS)同时测定正山小种红茶中18种微量元素

Simultaneous Determination of 18 Trace Elements in Lapsang Souchong Black Tea by Inductively Coupled Plasma Mass Spectrometry(ICP-MS)

采用微波消解样品,应用电感耦合等离子体质谱法(ICP-MS)同时测定正山小种红茶中Na、Mg、K、Ca、Fe、Al、Zn、Mn、Cu、Ge、Cd、Cr、Ni、Se、Mo、Hg、As和Pb 18种元素。对于所测元素校准曲线的相关系数>0.9990,回收率范围为90.1%～108.1%,相对标准偏差为1.54%～7.57%。正山小种红茶中Na、Mg、K、Ca、Fe、Al、Zn、Mn、Cu、Ge、Cd、Cr、Ni、Se、Mo、Hg、As和Pb 18种元素可用ICP-MS法同时测定,方法简便、快速、准确,灵敏度高。

Inductively coupled plasma mass spectrometry （ICP-MS） together with microwave sample di- gestion method were employed to establish an analytical method for simultaneous detection of 18 trace ele- ments in Lapsang souchong black tea. The 18 trace elements are Na,Mg,K,Ca,Fe,Al,Zn,Mn,Cu,Ge, Cd,Cr,Ni,Se,Mo, Hg,As and Pb. The correlation coefficients of the calibration curves for all analyzed el- ements were over 0. 9990;the recoveries were 90. 1 % -108.1%and the relative standard deviations were 1.54%-7.57%. The 18 trace elements in Lapsang souchong black tea can be simultaneously determined by ICP-MS. The method was simple, rapid, accurate and highly sensitive.