【摘要】 本文提出了一种全新的以酸直接提取煤中的矿物元素、ICP AES测定其含量的方法。考察了最佳酸配比、酸用量、最佳提取时间、仪器最佳操作参数以及元素间的干扰等诸多因素。与其灰分含量相比 ,煤中矿物质的提取率在 95 %以上 ,各元素加标回收率为 96%～ 1 0 4 %,九次测定相对标准偏差小于 4 %。方法准确、快速、适合于不同煤样中矿物元素的分析测定。更多还原

【Abstract】 A new mehtod is described for the analysis of whole coal for the major ash forming elements by ICP AES.The major ash forming elements were extracted with HF and HNO 3 in an ultrasonic water bathe.The best proportion of the acid and the time of extraction were studied.Compared with the ash content of coal,the extraction ratio is more than 95%.Recovery ratio is between 96%—104%.RSD of extractio and determination is less than 4% (n=9).更多还原