【摘要】 采用不同微波消解条件对太和贡椿椿芽样品进行消解,结合石墨炉原子吸收光谱法对Cu、Mn两种微量元素的含量进行测定。以加标回收率为衡量指标,设置微波消解程序A、样品消解质量B和消解液配方C三个因素,通过正交试验确定了微波消解的最优条件A₂B₂C₂,即微波消解预设程序2、消解样品质量1. 00g、消解液配方3:1。在此条件下,Cu、Mn元素的加标回收率分别为98. 78%和98. 33%,RSD在5%以内,实现了快速精密测定的目标。更多还原

【Abstract】 Different microwave digestion conditions were used to digest the bud samples of toona sinensis（ Taihe county）,and the concentrations of some trace elements such as Cu and Mn were determined by atomic absorption spectra. The optimal conditions for microwave digestion were determined by orthogonal experiment based on the recovery rate. By taking recovery rate as a measure indicator,orthogonal experiment was applied to determine the optimum condition of microwave digestion. The study indicated that the optimum conditions of Cu and Mn were A₂ B₂ C₂—microwave digestion procedure 2,digestion sample 1. 00 g,digestive solution formula 3. Under this condition,the recoveries for Cu and Mn were 98. 78% and 98. 33% respectively with RSD under 5%,which achieved the goal of rapid and precise measurement.更多还原