微波灰化ICP-AES法测定竹笋中的微量金属元素研究

Determination of micro metal elements in bamboo by microwave incinerate ICP-AES

采用微波灰化竹笋,盐酸溶解,ICP-AES法测定竹笋中对人体有益的微量金属元素钾、钙、镁、铁、锰、锌和铜的含量,考察了微波灰化的条件。结果表明:微波灰化温度700℃、恒温15min、样品量0.5000g,结果的相对标准偏差0.41%～4.5%、回收率95.3%～107.8%。t检验法显示,微波灰化法与传统的湿法消解之间差异不明显。微波灰化法处理竹笋样品,具有准确、节能、环保、快速等优点。

Some of elements including K,Ca, Mg, Fe, Mn,Zn and Cu in bamboo, which were beneficial to human health,were analyzed by ICP-AES after bamboo was incinerated by microwave and dissolved by hydrochloric acid respectively.The optimal conditions of incineration by microwave were also investigated and were as follows： 700℃ for incinerating, 15min for held time,and 0.5000g of bamboo sample. The results showed that the relative standard deviation was from 0.41% to 4.5% and recovery rate was from 95.3% to 107.8%.Although there was no significant difference in analytical results when incinerations by microwave and traditional method were completed respectively, incineration by microwave exhibited some of characteristics in treatment of sample such as accuracy, energy-saving ,benign environment and time-saving.