【摘要】 采用石墨炉原子吸收光谱法和原子荧光光谱法分别对金银花中微量铅、镉、汞和砷进行测定。给出了仪器的工作条件,及详细描述了4种元素的标准曲线数据包括线性回归方程、相关系数、线性范围和检出限。往金银花样品中加入铅、镉、汞和砷标准溶液,4种元素的加标回收率分别为94.2%,97.2%,107.2%,91.5%,相对标准偏差(n=6)均小于3%。用该法分析了3个中国产地的金银花,4种有害元素含量未见超标。更多还原

【Abstract】 Four harmful elements(Pb,Cd,Hg and As) of microamounts in honeysuckle were determined by GFAAS(for Pb and Cd) and by AFS(for Hg and As).Working conditions of the instruments were given.Data of standard curves of the 4 elements(including linear regression equations,correlation coefficients,ranges of linearity and detection limits) were deseribed in detail.Recovery was tested by adding standard solutions of Pb,Cd,Hg and As to a sample of honeysuckle,and the average values of recovery(n=6) found were 94.2%,97.2%,107.2% and 91.5% respectively.Precision was tested with standard solutions of the 4 elements,and values of RSD′s(n=6) found were less than 3%.Honeysuckle samples grown in 3 different areas in China were taken and analyzed by the proposed method,and amounts of the 4 elements found in these samples were all lower than the limit of allowance.更多还原