微波消解火焰原子吸收法测定中草药中痕量铅、铬、镉和镍的研究  

Study on the Determination of Pb,Cd,Cr and Ni in Chinese Herbal Medicine by Microwave Digestion and Atomic Absorption Spectrometry

作　　者：李银科[1,2] 徐袆然 范鹏[1] 胡秋芬[1] 

机构地区：[1]云南民族大学化学与生物技术学院,云南昆明650031 [2]玉溪师范学院资源环境学院,云南玉溪653100

出　　处：《云南民族大学学报（自然科学版）》2010年第2期116-118,共3页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家自然科学基金(29961012);云南省中青年学术带头人培养基金(2005PY01-32)

摘　　要：研究了用火焰原子吸收法测定中草药中痕量铅、铬、镉和镍的方法，中草药样品采用HNO3-H2O2消化体系微波消化，然后用原子吸收光谱法测定．在最佳微波消化条件和测定条件下，检出限为0．3～0．8ug／L，测定结果的相对标准偏差为1．8％～2．4％，回收率为94％～105％，结果令人满意．A new method for the determination of Pb, Cd, Cr and Ni in Chinese herbal medicine by the microwave digestion and atomic absorption spectrometry was studied. The sample was digested by microwave digestion through using HNO3 -H2O2 system. The Pb,Cd, Cr and Ni were determined by the atomic absorption spectrometry. Under the optimum microwave digestion and determination conditions, the detection limit is 0.3 - 0.8ug/L. The relative standard deviations are 1.8% -2.4% and the recoveries are 94% -105%. The results are satisfactory.

关 键 词：原子吸收法 铅 铬 镉和镍 微波消化 中草药 

分 类 号：O657.36[理学—分析化学]