ICP–AES法测定稀土硅铁球化剂和孕育剂中钙、镁、铝、锰、镧、铈

建立了电感耦合等离子体原子发射光谱法(ICP–AES)测定稀土硅铁球化剂和孕育剂中Ca,Mg,Al,Mn,La,Ce等元素含量的方法。通过基体匹配消除了铁基体的干扰,Ca,Mg,Al,Mn,La,Ce的分析谱线分别为317.933,279.553,394.401,257.610,333.749,456.236 nm。各元素标准曲线的线性相关系数均在0.999以上,检出限在0.000 1%~0.000 4%之间。方法的加标回收率为99.4%~102.8%,测定结果的相对标准偏差均小于3%(n=11)。用该方法测定标准样品,测定结果与认证值相吻合。该法适用于稀土硅铁球化剂和孕育剂中钙、镁、铝、锰、镧、铈的测定。

Determination of Ca,Ma, Al,Mn, La and Ce in Rare-Earth Ferrosilicom Nodulizer and Inoculant by Inductively Coupled Plasma Atomic Emission Spectrometry

A method for the determination of the content of calcium, magnesium, aluminum, manganese, lanthanum and cerium elements in rare-earth ferrosilicon nodulizer and inoculant by inductively coupled plasma atomic emission spectrometry was established. The interference of iron matrix was eliminated by matching the matrix. The analysis lines of Ca, Mg, Al, Mn, La, Ce were 317.933,279.553,394.401,257.610,333.749,456.236 nm, respectively. The results showed that the linear correlation coefficients of standard curves of each element were more than 0.999 and the detection limits of the elements were between 0.000 1% and 0.000 4%. The standard addition recoveries of the elements ranged from 99.4% to 102,8%, and the relative standard deviations of detection results were less than 3% （n=11）. The determination results of reference materials were consistent with the certified values. The method is suitable for determination of the content of Ca, Mg, Al, Mn, La Ce in rare-earth ferrosilicon inoculant and inoculant.