标准物质稀释法-电感耦合等离子体发射光谱快速测定磷矿石中的氧化镁

Rapid Determination of Magnesium Oxide in Phosphate Rock by Reference Material Dilution-Inductively Coupled Plasma Atomic Emission Spectrometry

用王水对磷矿石标准物质GBW07211进行处理,将处理后的溶液作为母液逐级稀释建立标准曲线,曲线线性相关系数为0.9994,可用于快速测定磷矿石中氧化镁含量。该法最大程度的做到基体匹配,其结果准确度高。以10倍标准偏差为下限,校准曲线最高点为上限,可检测0.03%~20%氧化镁含量的磷矿石样品,满足日常生产、研发过程样品检测需求。

The phosphate rock reference material GBW07211 was treated with aqua regia.The treated solution was diluted step by step as mother liquor to establish a standard curve.The linear correlation coefficient of the curve was 0.9994.It can be used for rapid determination of magnesium oxide content in phosphate rock.This method can achieve matrix matching to the greatest extent,and the result accuracy is high.With 10 times of standard deviation as the lower limit and the highest point of calibration curve as the upper limit,phosphate rock samples with 0.03~20%magnesium oxide content can be detected to meet the sample detection requirements in daily production and R&D process.