电感耦合等离子体质谱法测定烟叶中的14种稀土元素  

Simultaneous Determination of 14 Rare Earth Elements in Tobacco Leaves by Inductively Coupled Plasma Mass Spectrometry

作　　者：张晓静 秦存永[2] 尚静静[3] 刘伟 任志强 张艳芳 郑松锦 马桂芹 

机构地区：[1]河北中烟工业有限责任公司技术中心,石家庄市维明南大街1号050051 [2]河北白沙烟草有限责任公司,石家庄市珠江大道366号050035 [3]安徽省烟草质量监督检测站,合肥市桐城南路372号230001

出　　处：《烟草科技》2014年第9期44-47,51,共5页Tobacco Science & Technology

摘　　要：建立了一种同时测定烟叶中钪（Sc）,钇（Y）,镧（La）,铈（Ce）,镨（Pr）,钕（Nd）,钐（Sm）,铕（Eu）,钆（Gd）,铽（Tb）,镝（Dy）,钬（Ho）,镱（Yb）和镥（Lu） 14种稀土元素（REEs）的微波消解-电感耦合等离子体质谱（ICP-MS）方法,并采用该方法对玉溪（C3F,201 1年）,红河（C3F,2012年）,昭通、铜仁和许昌（X2F,2011年）5种烤烟烟叶样品进行了分析.结果表明：①方法的线性相关系数0.9992～0.9998,相对标准偏差（RSD）0.05％～2.03％,加标回收率94.5％～117.7％,检出限（3SD） 0.005～0.050 μg/L,定量限（10 SD）0.017～0.167 μg/L;②该方法对国家标准物质灌朱枝叶GBW07602（GSV-1）的测定值与标准值基本一致;③5个产区烟叶样品中的稀土元素以Sc,Y,La,Ce和Nd为主,且14种稀土元素的含量随原子序数的增大呈下降趋势;玉溪、昭通和红河3个产区烟叶中轻稀土元素总量（ΣLREEs）高于重稀土元素总量（ΣHREEs）,铜仁和许昌产区烟叶则与之相反;许昌产区烟叶中的稀土元素总量明显低于其他4个产区.该方法适用于烟叶中14种稀土元素含量的测定.A method for simultaneously determining 14 rare earth elements （REEs）, including Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Yb and Lu, in tobacco leaves by microwave digestion- inductively coupled plasma mass spectrometry was developed, and the leaf samples of flue-cured tobacco collected from Yuxi （C3F, 2011）, Honghe （C3F, 2012）, Zhaotong, Tongren and Xuchang （X2F, 2011） were determined by the developed method. The results showed that： 1） The linear correlation coefficients of the method for the 14 REEs ranged from 0.9992 to 0.9998, the recoveries for the spiked standards ranged from 94.5% to 117.7% with the relative standard deviations of 0.05%-2.03%, and the detection limits and quantitation limits of the method were in the range of 0.005-0.050 and 0.017-0.167 μg/L, respectively. 2） The determined values of national standard reference material, bush twigs and leaves, GBW07602（GSV-1）, by the developed method agreed with the certified reference values. 3） The major REEs in all samples were Sc, Y, La, Ce and Nd, and the total content of the 14 REEs decreased with the increase of atomic number. The total amount of the light REEs （∑LREEs） werehigher than that of the heavy REEs （∑ HREEs） in the samples from Yuxi, Zhaotong and Honghe, while lower than that of the heavy REEs （∑ HREEs） in the samples from Tongren and Xuchang. Comparing with the other four areas, the total REEs content in the samples from Xuchang was significantly lower. This method is suitable for the determination of the 14 REEs in tobacco leaves.

关 键 词：电感耦合等离子体质谱(ICP-MS) 微波消解 烟叶 稀土元素 

分 类 号：TS411.1[农业科学—烟草工业]