原子荧光光谱法测定新疆薰衣草中的铅、砷和汞

Determination of Pb,As and Hg in Lavandula angustifolia Mill. of Xinjiang by Atomic Fluorescence Spectrometry

采用原子荧光光谱法对新疆不同产地薰衣草样品中的铅、砷和汞3种重金属元素的含量进行了测定。结果表明,测定薰衣草中的铅、砷和汞元素的线性范围分别在0.1~20μg·L-1、0.5~50μg·L-1和0.1~10μg·L-1之间,检出限分别为0.05μg·L-1、0.03μg·L-1和0.05μg·L-1,相对标准偏差（RSD）≤3.03%（n=6）,各元素的加标回收率在97.0%~103.0%之间。该方法快速、简便、数据准确可靠。

In the present paper, the contents of Pb, As and Hg in Lavandula angustifolia Mill. from different regions of Xinjiang were determined by atomic fluorescence spectrometry. The relative standard deviation（RSD） of each result was less than 3.03%, and the recovery of each sample was between 97.0% and 103.0%. The linear range of the method was 0.1-20 μg.L-1 for Pb,0.5-50 μg.L-1 for As and 0.1-10μg.L-1 for Hg. The limits of detection were 0.05 μg.L-i ,0.03 μg.L-1 and 0.05μg.L-1 for Pb,As and Hg,respectively. The results showed that the contents of harmful elements Pb,As and Hg were found to be lower than those qualified in the national standards GB2762-2005. The obtained data provide the new scientific evidences for the further studies and comprehensive utilization of Lavandula angusti folia Mill..