Determination of Trace Elements in Some Seasonings by Microwave Digestion-high Resolution Continuum Source Graphite Furnace Atomic Absorption Spectrophotometry
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Abstract:
An effective method was developed for sequential rapid determination of trace elements in some seasonings by microwave digestion-high resolution continuum source graphite furnace atomic absorption spectrophotometry. The interferences were eliminated by adding the corresponding matrix modifiers. Results showed that the instrument detection limits of Cu, Cd, Pb, Mn and Al were 1.22 ng/mL, 0.077 ng/mL, 1.53 ng/mL, 0.614 ng/mL and 1.54 ng/mL, respectively by this method. The recoveries were 95.2~106.4%. The precision relative standard deviations were less than 5.22%. Therefore, this method was rapid, accurate, stable and less pollution, and had a high practical value. It provided scientific basis for sequential rapid determination of many trace elements in food.
