人工养殖赤子爱胜蚓中重金属及有害元素的测定

Determination of Heavy Metal and Deterious Elements in Breeding State of Eisenia Foetida Savigny

关键词:  赤子爱胜蚓  重金属  有害元素  石墨炉原子吸收法  原子荧光光谱法

Key words:  Eisenia foetida Savigny  heavy metal  deterious elements  atomic absorption spectrometry  atomic flrourescene

摘要:

目的 建立人工养殖赤子爱胜蚓中铅、镉、砷、汞、铜含量测定的方法，并测定6批赤子爱胜蚓药材中铅、镉、砷、汞、铜的含量。方法 采用微波消解样品，用石墨炉原子吸收法测定铅、镉的含量；火焰原子吸收法测定铜的含量；原子荧光光谱法测定砷、汞含量。结果 铅的回收率为103.6%（RSD=6.4%），镉的回收率在92.0%（RSD=7.7%），铜的回收率在101.6%（RSD=8.1%），砷的回收率在94.4%（RSD=4.7%），汞的回收率在93.6%（RSD=5.4%）。结论 本方法操作简便、快速，且准确度和精密度高，适合于赤子爱胜蚓药材中铅、镉、铜、汞和砷的含量测定。

Abstract:

OBJECTIVE To establish a determination method of Pb, Cd, Cu, As and Hg in breeding state of Eisenia foetida Savigny, and the contents of Pb, Cd, Cu, As and Hg were quantitatively determined in 6 batches of Eisenia foetida savigny.. METHODS The sample was digested by microwave, the content of Pb and Cd was measured by graphite furnace atomic absorption spectrometry (GFAAS), the content of Cu was measured by flame atomic absorption spectrometry (FAAS); the content of As and Hg was measured by atomic fluorescence spectrometry. RESULTS The recovery of Pb was 103.6%(RSD=6.4%), the recovery of Cd was 92.0%(RSD=7.7%), the recovery of Cu was 101.6%(RSD=8.1%), the recovery of As was 94.4%(RSD=4.7%) and the recovery of Hg was 93.6%(RSD=5.4%). CONCLUSION These methods are simple and rapid for operating. Moreover, the accuracy of these methods is high. Experiments show the method is suitable for the determination of the contents of Pb, Cd, Cu, As and Hg in Eisenia foetida Savigny.