熔融制样-X射线荧光光谱法测定锰铁中硅、锰、磷、铬、镍和铜

XRFS Determination of Silicon,Manganese,Phosphorus,Chromium,Nickel and Copper in Ferromanganese with Sample Preparation by Fusion

采用熔融制样-X射线荧光光谱法测定锰铁中硅、锰、磷、铬、镍和铜的含量。样品以四硼酸锂为熔剂，在300℃下加热15min，慢速升温至1100℃，熔融15min，冷却后制成玻璃片，用于x射线荧光光谱分析。6种元素在一定的质量分数范围内与其信号强度呈线性关系，方法的检出限在15～59μg·g叫之间。方法用于锰铁样品的分析，测定值的相对标准偏差（n=11）在0．16％～3．6％之间。

XRFS was applied to the determination of silicon, manganese, phosphorus, chromium, nickel and copper in ferromanganese. Using Li2B4O2 as flux, the sample was first heated at 300 ℃ for 15 min, and then the temperature was gradually raised to 1 100℃, where the sample was fused for 15 min. After cooling, the glassy melt obtained was used directly as sample for XRFS analysis. Linear relationships between values of signal intensity and mass fraction of the 6 elements were kept in definite ranges. Detection limits found were ranged from 1S to 59 μg · g-1 The proposed method was applied to the analysis of substantial ferromanganese sample, giving values of RSD＇s （n=11） in the ranges of 0. 16%-3.6%.