用电感耦合等离子体原子发射光谱法测定烟叶中矿物质元素

Determination of Mineral Elements in Tobacco Leaf by Inductively Coupled Plasma-Atomic Emission Spectrometry

采用电感耦合等离子体原子发射光谱法（ICP-AES）测定了烟叶样品中的钾、钙、铁、锰、铜、锌等矿质元素的含量。结果表明：此方法的检测限低，为0．002-0．004μg／mL；精密度高，相对标准偏差≤3．0％；准确率高，加标回收率在98％以上；标准物质对比分析的相对误差为1．08％～2．61％。

The contents of some mineral elements （potassium, calcium, iron, manganese, copper and zinc） in tobacco leaf samples were determined by adopting inductively coupled plasma-atomic emission spectrometry （ICP-AES）. The results showed that： the detection limit of this measurement method was low, being 0.002～ 0.004 mg/L; its precision was high, and relative stand- ard deviation was equal to or less than 3.0% ; its accuracy was high, and standard-adding recovery was more than 98% ; the relative error varied from 1.08% to 2.61% in the contrastive analysis of tobacco leaf samples and standard substances.