微波消解电感耦合等离子体原子发射光谱法测定煤中砷和磷

Determination of arsenic and phosphorus in coal by inductively coupled plasma atomic emission spectrometry with microwave digestion

利用硝酸和过氧化氢的混合体系于高压密闭微波消解仪中消解试样,采用电感耦合等离子体原子发射光谱法同时测定煤中的砷和磷。微波消解电感耦合等离子体原子发射光谱法的砷检出限为0.005 4μg/g、磷检出限为0.000 34%。该方法操作简便、快速,通过测定标准物质,其检测值和标准值基本一致,测试相对标准偏差小于5%,可满足煤中砷和磷的准确测定。

Samples were digested by the mixed system of nitric acid and hydrogen peroxide with the assistance of high pressure hermetic microwave digestion instrument,arsenic and phosphorus were simultaneously determined by inductively coupled plasma atomic emission spectrometry.The detection limit for arsenic is 0.005 4μg/g and for phosphorus is 0.000 34%.This method is simple and fast.The detection values are basically consistent with the standard values by determining certified reference materials,the relative standard deviations are below 5% for both of them,this method could reach the determination requirements of arsenic and phosphorus in coal.