摘要
考查了石墨炉原子吸收测定硅铁合金中钼的最佳灰化、原子化条件，酸介质及共存元素的影响。研究和比较了硝酸镍、氟化钙、氯化钙、氟化铵、酒石酸、EDTA、抗坏血酸对钼测定的增敏作用。以盐酸为介质，氟化钙作基体改进剂的测定体系对抑制干扰，提高分析灵敏度，扩大线性范围具有满意效果。本文还对钼的原子化机理及氟化钙增敏作用作了初步的探讨。
Determination of trace Mo in ferrosilicon alloy by graphite furnace atomic absorption spectrometry is studied.The optimum conditions of ashing and atomization,effect of varying acid medium and the coexisting elements on the determinat nio of Moare investigated. The enhancement effect of Ni(NO3)2, CaF2, CaCl2,NH4F, tartaric acid, EDTA,ascorbic acid in the determination of trace Mo is also examined.It can raise the sensitivity of the method that HCl is selected as acid medium and CaF2 is selected as matrix modifier to determine Mo.The linear range is greater than the concentration range of Mo alibration curve. In addition the atomization mechanism of molybdenum and priciple of enhancing effect of CaF2 are discussed.
关键词
硅铁合金
钼
光谱分析
低合金钢
Graphite furnace atomic absorption spectrometry, Matrix modifier, Ferrosilicon alloy, Molybdenum
