Determination of Cu, Cd, Pb, Mn,Al in Fructus Amomi Rotundus by Microwave Digestion-High Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrophotometry
An effective method is developed for sequential rapid determination of five trace elements in Fructus Amomi Rotundus by microwave digestion-high resolution continuum source graphite furnace atomic absorption spectrophotometry.The interferences are eliminated effectively by appropriate analytical spectral lines and matrix modifiers.Under the selected work conditions,the contents of Cu,Cd,Pb,Mn,Al in Fructus Amomi Rotundus are 9.59,0.134,0.363,249.8,624.4 μg/g respectively,the recoveries are 103.0％,106.4％,99.7％,95.6％,96.4％ respectively,the detection limits of the instrument are 1.22,0.077,1.53,0.614,1.54 ng/mL respectively by this method,the precision relative standard deviations are all less than 3.7％.Therefore,this method is rapid,accurate,stable and with less pollution,and it has high practical value.It has provided scientific basis for sequential rapid determination of many trace elements in food.
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