Determination of the Mineral Compositions of in Six Beans by Microwave Digestion with Inductively Coupled Plasma Atomic Emission Spectrometry

In the study, microwave digestion procedure optimized was applied for digesting beans. Nineteen mineral element concentrations were determined by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The result indicated detection limits for the 19 elements were less than 0.0998, and relative standard deviations were 1.01% similar to 5.02% for all the elements, and recoveries were 90.89% similar to 104.55% by adding standard recovery experiment. The study showed the beans selected were abundant in mineral element contents in human nutrition, determination mineral element contents by ICP-AES with microwave digestion technology were a lot of merits of small environmental pollution, fast and accurate determination result, which could satisfy the examination request of bean samples. The results provided evidence that the six beans were a good source of K, P, Mg and Ca. This study is to give important reference value to people due to individual differences by adjusting the dietary to complement the different mineral elements.