伸筋草中重金属和农药残留量分析

Analysis of Heavy Metals and Pesticide Residue in Lycopodium japonicum Thunb

目的对来自不同产地不同海拔高度的伸筋草药材中重金属和有机氯农药残留量进行分析,为控制其质量和标准制订提供科学依据。方法采用原子荧光测定砷和汞残留量,等离子体发射法测定铅和铝的残留量,气相色谱法测定五氯硝基苯(PCNB)、有机氯农药六六六和滴滴涕的残留量。结果伸筋草药材中含砷、铅、汞和铝的残留量分别为0.53～1.42,0.11～0.49,0.27～1.74 mg/kg及0.47%～1.05%。在所有样品中均未检出五氯硝基苯(PCNB),均检出微量六六六及滴滴涕。结论伸筋草药材中含有一定量的重金属,虽符合国家标准,但铝含量较高,应予以重视;所有样品农药残留量均未超过国家行业标准——《药用植物及制剂进出口绿色行业标准(2001年)》,产地不同对重金属残留有影响,但海拔高度影响不明显。产地及海拔高度对农药残留均无规律性影响。

Objective To analyze the residual amount of heavy metals and pesticide in Chinese medicinal material Lycopodium japonicum Thunb from different areas and different altitudes and to provide the scientific foundation for the quality control and standard establishment of Lycopodium japonicum Thunb. Methods The residual amount of As and Hg was determined by AFS, Pb and A1 were measured by ICP,the organic-chlorine pesticide residue was determined by GC--MS. Results The content of As,Pb,Hg and A1 were 0. 53 -1. 42, 0.11- 0. 49, 0. 27 -1. 74mg/kg and 0.47% -1.05% ,respectively. No PCNB was found in the samples, but a few BHC and DDT were detected in all samples. Conclusion A few amount of heavy metals can be detected in Lycopodium japonicum Thunb. The pesticide residues in all samples do not exceed the national industrial standard the Medicinal Plants and Preparation Import and Export Green Industry Standard（2001）. It should be paid attention to high amount of Al in samples. Different areas have different effects on heavy metal residues,but the altitudes have no obvious influence on pesticide residue.